CIRCULAR

PROMULGATING 3 NATIONAL TECHNICAL REGULATIONS ON QUALITY OF SURROUNDING ENVIRONMENT

Pursuant to the Law on Technical Regulations and Standards dated June 29, 2006;  

Pursuant to the Law on Environmental Protection dated November 17, 2020;

Pursuant to Decree No. 08/2022/ND-CP dated January 10, 2022 of  the Government of Vietnam elaborating on several articles of the Law on Environmental Protection and Decree No. 05/2025/ND-CP dated January 6, 2025 of the Government of Vietnam on amendments to Decree No. 08/2022/ND-CP dated January 10, 2022 of the Government of Vietnam elaborating on several articles of the Law on Environmental Protection;  

Pursuant to Decree No. 127/2007/ND-CP dated August 1, 2007 of the Government of Vietnam elaborating on several articles of the Law on Technical Regulations and Standards and Decree No. 78/2018/ND-CP dated May 16, 2018 of the Government of Vietnam on amendments to Decree No. 127/2007/ND-CP dated August 1, 2007 of the Government of Vietnam elaborating on several articles of the Law on Technical Regulations and Standards;

Pursuant to Decree No. 35/2025/ND-CP dated February 25, 2025 of the Government of Vietnam on functions, tasks, entitlements, and organizational structure of the Ministry of Agriculture and Environment of Vietnam;

At the request of the Director of the Department of Environment and Director of the Department of Science and Technology;

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Article 1. 3 national technical regulations on the quality of the surrounding environment are promulgated together with this Circular, including:

1. QCVN 26:2025/BNNMT – National Technical Regulation on Noise;

2. QCVN 27:2025/BNNMT – National Technical Regulation on Vibration;

3. QCVN 43:2025/BNNMT – National Technical Regulation on Sediment Quality.

Article 2. Entry into force

1. This Circular comes into force as of November 14, 2025.

2. From the effective date of this Circular, the following National Technical Regulations shall cease to have effect:

a) QCVN 26:2010/BTNMT – National Technical Regulation on Noise (promulgated together with Circular No. 39/2010/TT-BTNMT dated December 16, 2010 of the Minister of Natural Resources and Environment of Vietnam);

b) QCVN 27:2010/BTNMT – National Technical Regulation on Vibration (promulgated together with Circular No. 39/2010/TT-BTNMT dated December 16, 2010 of the Minister of Natural Resources and Environment of Vietnam);

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Article 3. Transitional provisions

Facilities that have operated and projects with decisions on approval for the appraisal results of environmental impact assessment reports or with adequate and valid applications for appraisal of environmental impact assessment reports, issuance of environmental licenses, or environmental registration received by competent authorities before the effective date of this Circular shall continue to apply QCVN 26:2010/BTNMT, QCVN 27:2010/BTNMT, and regulations of local authorities until December 31, 2026.

Article 4. Application roadmap

1. From the effective date of this Circular, investment projects (including new investment projects and investment projects on scale expansion and capacity improvement applying for appraisal of environmental impact assessment reports, issuance of environmental licenses, or environmental registration after the effective date of this Circular) shall apply QCVN 26:2025/BNNMT and QCVN 27:2025/BNNMT.

2. From January 1, 2027, the cases prescribed in Article 3 of this Circular shall meet the requirements prescribed in QCVN 26:2025/BNNMT and QCVN 27:2025/BNNMT.

3. The cases prescribed in Article 3 of this Circular are encouraged to apply QCVN 26:2025/BNNMT and QCVN 27:2025/BNNMT from the effective date of this Circular.

Article 5. Implementation

1. Ministries, ministerial agencies, People’s Committees at all levels, Departments of Agriculture and Environment of provinces and centrally affiliated cities, and relevant organizations and individuals shall implement this Circular.

2. Any difficulty arising during the implementation of this Circular shall be promptly reported (in writing) to the Ministry of Agriculture and Environment of Vietnam for consideration and settlement./.

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PP. MINISTER
DEPUTY MINISTER




Le Cong Thanh

QCVN 26:2025/BNNMT

NATIONAL TECHNICAL REGULATION ON NOISE

QCVN 26:2025/BNNMT

Foreword

QCVN 26:2025/BNNMT is compiled by the Department of Environment, proposed by the Department of Science and Technology, appraised by the Ministry of Science and Technology of Vietnam, and promulgated by the Minister of Agriculture and Environment of Vietnam under Circular No. 01/2025/TT-BNNMT dated May 15, 2025.

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NATIONAL TECHNICAL REGULATION ON NOISE

1. GENERAL PROVISIONS

1.1. Scope

This Regulation provides for the maximum noise limit in areas where humans live, operate, and work to reduce negative impacts, protect health, and improve life quality for humans.

This Regulation provides for noise emitted from production, business, and service facilities, construction works in progress, traffic vehicles, and civic activities.

This Regulation shall not be applied to assess noise encountered in the labor environment or workplace or in the premises of production, construction, trade, and service facilities affected by their own noise.

1.2. Regulated entities

This Regulation applies to environmental authorities, organizations, and individuals relevant to noise emission in the territory of the Socialist Republic of Vietnam.

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1.3.1. Noise in this regulation shall be construed as loud sounds emitted from the use of devices, machinery, instruments, tools, and other sources that affect specific areas and cause discomfort to humans.

1.3.2. Affected areas refer to areas where noise measurement, monitoring, and control are carried out.

1.3.3. Production, business, and service facilities and civic activities that can emit noise according to this regulation include:

1.3.3.1. Production, business, and service facilities and civic activities that use devices, machinery, instruments, and tools that emit noise by capacity, type, and quantity are prescribed in the Appendix enclosed with this Regulation.

1.3.3.2. Production, business, and service facilities and civic activities that do not use devices, machinery, instruments, and tools that emit noise by capacity, type, and quantity are prescribed in the Appendix enclosed with this Regulation.

1.3.4. Background noise level refers to the noise level measured at the measurement location of the affected area when no noise is emitted from the noise source to be measured.

1.3.5. Noise classification

a) Continuous noise refers to noise emitted continuously from a noise source without interruption.  Continuous noise includes:

- Stationary noise refers to continuous noise with a sound pressure level that does not vary significantly during the time the noise is emitted;

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b) Impulsive noise refers to noise emitted during a very short duration (under 1 second) from a determined noise source that may recur during the measurement duration;

c) Intermittent noise refers to noise emitted continuously from a determined noise source that is interrupted for a specific duration, with each noise emission lasting at least 1 second.

1.3.6. Measurement duration refers to the duration used as the noise emission duration during which the measurement is carried out continuously.

1.3.7. Frequency-weighted sound pressure level (LA) is ten times the base-10 logarithm of the ratio between the time-based squared sound pressure level and the squared reference value in decibels (dBA):

p_a and p₀ are sound pressure levels in pascals (Pa)

p₀ = 20 µPa

1.3.8. Equivalent continuous sound pressure level (L_eq,T) is ten times the base-10 logarithm of the ratio between the time-averaged sound pressure p_a during measurement duration T and the squared reference sound pressure p₀.

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p_A(t) is the instantaneous A-weighted sound pressure at time t;

p₀ = 20 µPa.

T: noise measurement duration (starts at t1 and ends at t2)

L_Aeq,T: A-weighted equivalent sound pressure.

1.3.9. 90th percentile sound pressure level (L₉₀) refers to the sound pressure level that is exceeded for 90% of the measurement duration.

1.3.10. Sound exposure level (L_E) is ten times the base-10 logarithm of the ratio between the sound exposure (E) and the reference value E₀.

Where:

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2. TECHNICAL PROVISIONS

2.1. Affected area classification

The classification of affected areas in this Regulation shall be carried out as follows:

2.1.1. Area A includes the following facilities and works:

- Educational institutions according to the Law on Education and vocational education institutions according to the Law on Vocational Education;

- Medical examination and treatment facilities according to the Law on Medical Examination and Treatment; senior care facilities according to the Law on the Elderly;

- Museums and libraries;

- Religious works;

- Offices of agencies of the CPV, National Assembly of Vietnam, Government of Vietnam, and President of Vietnam and offices of Ministries, central authorities, People’s Committees, and affiliates at various levels; headquarters of political organizations, socio-political organizations, and socio-vocational political organizations and headquarters and offices of organizations and individuals.

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- Houses: apartment buildings and other types of collective houses; separate houses;

- Hotels, guesthouses, motels, and other accommodation service establishments;

2.1.3. Area C includes the following facilities and works:

Livestock, cultivation, and aquaculture facilities.

2.1.4. Area D includes the following facilities and works:

- Outdoor and indoor works of sports;

- Parks;

- Conference centers, theaters, cultural houses, clubs, cinemas, circuses, dance halls, amusement/entertaining works, and other cultural works;

- Malls, supermarkets, markets, stores, restaurants, and other similar works.

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- Airport, waterway, and railway terminals, bus stations, and parking lots;

- Concentrated production, business, and service areas and industrial works according to the law;

- National defense and security works that are not used for purposes similar to those of works in areas A, B, C, and D;

- Other works.

2.2. Permissible maximum value of noise emitted from production, business, and service facilities and civic activities according to Section 1.3.3.1 measured in affected areas

The permissible maximum value of noise emitted from production, business, and service facilities and civic activities according to Section 1.3.3.1 measured in affected areas is prescribed in the following Table:

Table 1. Permissible maximum value of noise emitted from production, business, and service facilities and civic activities according to Section 1.3.3.1

[Unit: dBA]

Affected area

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Day
(06:00 to before 18:00)

Evening
(18:00 to before 22:00)

Night
(22:00 to before 06:00)

Area A

50

45

40

Area B

55

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45

Area C

60

55

50

Area D

65

60

55

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70

65

60

Where:

It is permitted to adjust the permissible maximum value threshold of noise prescribed in Table 1 according to specific noise emission duration as follows:

Table 2. Adjustment values of thresholds according to noise emission duration from production, business, and service facilities and civic activities according to Section 1.3.3.1

Noise emission duration

Difference in value thresholds in Table 1 allowed to be adjusted

One of the following cases:

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≤ 0,5 hour in the evening

≤ 0,25 hour at night

+15 dBA

One of the following cases:

> 1 hour and ≤ 2 hours during the day

> 0,5  hour and ≤ 1 hour in the evening

> 0,25  hour and ≤ 0,5 hour at night

+10 dBA

One of the following cases:

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> 1  hour and ≤ 2 hours in the evening

> 0,5  hour and ≤ 1 hour at night

+5 dBA

One of the following cases:

> 4 hours and ≤ 6 hours during the day

> 2  hours and ≤ 3 hours in the evening

> 1  hour and ≤ 1,5 hours at night

+3 dBA

One of the following cases:

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> 3 hours in the evening

> 1,5 hours at night

Apply the thresholds in Table 1

2.3. Permissible maximum value of noise emitted from other sources

The permissible maximum value of noise emitted from other sources is prescribed in Table 3.

Table 3. Permissible maximum value of noise emitted from other sources

[Unit: dBA]

Affected area

Period

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Evening (18:00 ~ before 22:00)

Night (22:00 ~ before 06:00)

Noise source

Areas A, B, and C

Speaker ^(*)

Installed outdoor

65

60

60

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55

50

45

Production, business, or service facilities in the same building^(***)

50

45

40

Other production, business, or service facilities and civic activities

55

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45

Construction sites in progress ^(**)

65

60

50

Areas D and E

Speaker (*)

Installed outdoor

70

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60

Noise emitted from the inside of the building to the outside

65

60

55

Production, business, or service facilities in the same building (***)

55

50

45

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65

60

55

Construction sites in progress (**)

70

65

50

Where noise is emitted from construction sites in progress during the day, it is permitted to adjust the permissible maximum value threshold prescribed in Table 4 as follows:

Table 4. Adjustment values of thresholds according to noise emission duration during the day from construction sites in progress

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Difference in value thresholds in Table 3 allowed to be adjusted

≤ 3 hours

+10 dBA

> 3 hours and ≤ 6 hours

+5 dBA

6 hours

Apply the thresholds in Table 3

Note:

i) ^(*) Noise emitted from speakers does not apply to speakers or horns of specialized vehicles of agencies or units permitted for use under the law and speakers of licensed art performance programs.

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iii) In addition to the application of threshold adjustments prescribed in Table 4, it is mandatory to adjust -5dBA to the permissible maximum value of construction sites in progress during off days according to regulations for areas A and B.

iv) ^(***) “In the same building” refers to a building with a roof, pillars, or walls that are in a monolithic structure of construction works according to the law. The permissible maximum value for noise emitted from other sources for “in the same building” shall only apply to the following production, business, and service facilities:

- Gym and fitness facilities, martial arts dojos, and dance clubs;

- Music teaching facilities;

- Bars, restaurants, supermarkets, and karaoke facilities.

2.4. Permissible maximum value for noise emitted from traffic vehicles

The permissible maximum value for noise emitted from traffic vehicles is prescribed in Table 5.

Table 5. Permissible maximum value for noise emitted from traffic vehicles

[Unit: dBA]

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Limit

Day
(06:00 ~ before 22:00)

Night
(22:00 ~ before 06:00)

1. Roads

Areas A, B, and C

68

58

Areas D and E

73

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2. Railways

Areas A, B, and C

70

60

Areas D and E

75

65

2.5. Adjustment value based on background noise level

Continuous background noise level measurement shall be carried out when no noise is emitted from the noise source, which will be measured in an affected area for at least 5 minutes, using the Leq results as the background noise level. Where it is impossible to separate the noise emitted from the noise source to measure the noise level, conduct the measurement in the affected area for at least 5 minutes, using the L90 value as the background noise level.

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- Where the background noise level is lower than the emitted noise level and the difference between the background noise level and the emitted noise level is lower than 10 dBA, apply adjustment values to the noise level measurement results as follows:

Table 6. Adjustment value of measurement results based on background noise level

Difference between the noise level and background noise level in the measurement area (dBA)

3

4 ÷ 5

6 ÷ 9

Adjustment value of the noise level measurement results (dBA)

-3

-2

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3. DETERMINATION METHODS

3.1. Noise level measurement locations

- The measurement location is inside the boundary of an affected area;

- The measurement location shall have the nature of general representativeness, provide accurate measurement results, and properly reflect the emitted noise; it is permitted to conduct the measurement at a location that may be most affected;

- The measurement location shall avoid other noise sources that are not relevant to the noise source to be measured. When it is impossible to avoid the effects of other noise sources, select a reasonable measurement time to maximize the elimination of impacts from other noise sources;

- Regarding outdoor measurement locations, select a location that is at least 3,5 m away from possible echoes and at least 1,2 m or 1,5 m above the ground.

- Regarding indoor measurement locations, select a location that is at least 1 m away from possible echoes and at least 1,2 m or 1,5 m above the ground.

3.2. Noise level meters

- The monitoring and measurement of noise levels to assess conformity with this Regulation shall use type-1 sound level meters according to TCVN 12527-1:2018 – Electroacoustics – Sound level meters – Part 1: Specifications

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3.3. Noise level measurement conditions

Noise levels are affected by meteorological conditions, especially when the transmission distance is large. Therefore, it is mandatory to maximize the elimination of the effects of meteorological conditions during the measurement.

- The measurement shall be carried out when there is no rain;

- The meter must have a windshield. The measurement shall not be carried out when there are level-4 winds or higher (wind speed from 5,5 m/s or higher) at the noise level measurement location.

The weather conditions at the measurement location shall be described and recorded in noise level measurement minutes throughout the measurement.

3.4. Noise level measurement duration

- Noise levels shall be measured continuously during the measurement for at least 15 minutes.  When conducting a continuous measurement, use the measurement duration as the noise emission duration.

- Regarding impulsive noise, the noise level measurement shall be carried out for at least 15 minutes.  Where a 15-minute measurement does not obtain 50 measurement values, continue the measurement until there are 50 values.

3.5. Noise level measurement methods

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- TCVN 7878 - 1:2018 (ISO 1996 - 1:2016) Part 1: Basic quantities and assessment procedures.

- TCVN 7878 - 2:2018 (ISO 1996 - 2:2017) Part 2: Determination of sound pressure levels.

3.6. Measurement results and conformity assessment

3.6.1. Regarding continuous noise

The measurement results shall be used as the equivalent sound pressure level L_eq,T during the measurement duration to calculate and assess conformity with this regulation.

3.6.2. Regarding intermittent noise and impulsive noise

Determine the equivalent sound pressure level for each occurrence of intermittent noise or impulses (for impulsive noise), and then determine the equivalent sound level during the whole measurement duration as follows:

- Determine the sound exposure level LE for each occurrence of intermittent noise or each impulse following the formula prescribed in Section 1.3.10.

- Determine the equivalent sound level during the whole measurement duration as follows:

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Where:

- L_E1, L_E2… L_En: sound exposure level by each occurrence of intermittent noise of each impulse during the measurement duration (dBA);

- T: measurement duration (s);

- T₀: reference duration.  T₀ = 1s.

L_eq,T shall be used for calculation and assessment of conformity with this regulation.

4. MANAGEMENT PROVISIONS

4.1. The monitoring of noise levels and use of monitoring results for state management objectives concerning the environment shall be carried out by organizations meeting the requirements and conditions for environmental monitoring capacity according to the law.

4.2. When conducting the measurement and assessment of the background noise level, where the background noise level measured in the affected area has Leq higher than the respective level prescribed in this Regulation, refrain from conducting the assessment of noise emitted from the noise source to be measured and adopt measures to reduce noise emitted to the affected area.  Noise emission shall be assessed as complying and conforming with this Regulation when the noise level measurement and monitoring results in the affected area do not exceed the respective permissible value prescribed in Section 2 on technical provisions.

4.3. When the noise level in affected areas exceeds the respective permissible value prescribed in this Regulation, state management authorities, organizations, and individuals shall adopt measures to reduce the impacts of emitted noise on affected areas.

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5. RESPONSIBILITIES OF ORGANIZATIONS AND INDIVIDUALS

5.1. Organizations and individuals that may cause noise shall ensure that the noise levels emitted to affected areas do not exceed the permissible limit prescribed in this Regulation.

5.2. State management authorities shall conduct noise level measurement and monitoring in affected areas and develop comprehensive plans for noise control, ensuring compliance with the permissible limit prescribed in this Regulation.

6. IMPLEMENTATION

6.1. Environmental authorities shall instruct, inspect, and supervise the implementation of this Regulation.

6.2. Where any document cited in this Regulation is amended or replaced, comply with its new edition./.

APPENDIX

List of types and quantities of devices emitting noise regarding production, business, and service facilities and civic activities

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1.1.) Air compressors with a capacity of 7,5kW or more or screw compressors with a capacity of 37,5kW or more;

1.2) Ventilation fans with a capacity of 7,5kW or more;

1.3) Metal forging and forming machines with a capacity of 7,5kW or more (excluding pneumatic ones);

1.4) Metal cutting machines with a capacity of 7,5kW or more;

1.5) Non-hydraulic presses with a capacity of 7,5kW or more or hydraulic presses with a capacity of  22,5kW or more (excluding hydraulic metal bending machines);

1.6) Sand separators with a capacity of 7,5kW or more;

1.7) Grinders (including coarse and fine grinders) with a capacity of 7,5kW or more;

1.8.) Actuators with a capacity of 22,5kW or more;

1.9) Mechanical equipment combinations with a capacity of 7,5kW or more;

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1.11) Concrete mixers and asphalt mixers with a capacity of 15kW or more or other mixers with a capacity of 37,5kW or more;

1.12) Other mechanical processing machines (lathes, milling machines, grinders, and drills) with a capacity of 37,5kW or more;

1.13) Fine powder grinders with a capacity of 22,5kW or more;

1.14) Power saws with a capacity of 15kW or more;

1.15) Wood processing machines (planers, cutters, grinders, CNC machines, and drills) with a capacity of 15kW or more;

1.16) Letterpress printing machines (typo) with a capacity of 15kW or more, offset printing machines with a capacity of 75kW or more, or other printing machines with a capacity of 37,5kW or more;

1.17) Rollers with a capacity of 37,5kW or more;

1.18) Rice mills with a capacity of 22,5kW or more;

1.19) Extrusion and injection molding machines with a capacity of 37,5kW or more;

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1.21) Concrete pipe and pile manufacturing machines with a capacity of 15kW or more;

1.22) Pumps with a capacity of 15kW or more;

1.23) Metal spinning machine with a capacity of 22,5kW or more (including wet drawing machines, twisting machines, and winding machines);

1.24) Paper-making machines with a capacity of 22,5 or more;

1.25) Coal briquette machines with a capacity of 7,5kW or more;

1.26) Production, business, and service facilities using devices prescribed in Section 1.1 through Section 1.25 with a smaller capacity for each type of machine, and the total capacity of all the devices in the list above exceeds 37,5kW (or exceeds 75kW in cases where offset printers are used). 

2. Devices, machinery, and tools according to quantity at facilities

2.1.) At least 100 industrial sewing machines;

2.2) At least 4 block and cement brick manufacturing machines;

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2.4) At least 1 metal box manufacturing machine;

2.5) At least 2 automatic packaging machines;

2.6) At least 40 weaving machines (excluding knitting machines);

2.7) At least 1 spinning machine or 5 winding machines.

3. Devices, machinery, and other tools

3.1) Heavy metal forging and forming machines with a hammer weight greater than 0,5 tons;

3.2) Power generators with a capacity of 120kW or more (excluding hydraulic power generators);

3.3) At least 2 grinders, each with a capacity of 3,75kW or more;

3.4) At least 1 stone cutting machine with a capacity of 7,5kW or more.

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QCVN 27:2025/BNNMT

NATIONAL TECHNICAL REGULATION ON VIBRATION

Foreword

QCVN 27:2025/BNNMT is compiled by the Department of Environment, proposed by the Department of Science and Technology, appraised by the Ministry of Science and Technology of Vietnam, and promulgated by the Minister of Agriculture and Environment of Vietnam under Circular No. 01/2025/TT-BNNMT dated May 15, 2025.

QCVN 27:2025/BNNMT replaces QCVN 27:2010/BTNMT.

NATIONAL TECHNICAL REGULATION ON VIBRATION

1. GENERAL PROVISIONS

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This Regulation provides for the permissible maximum limit of vibration acceleration levels (vibration levels) in affected areas where humans live, operate, and work to prevent potential effects of the vibration on human health, comfort, and perception.

This Regulation provides for vibration generated from production, business, and service facilities, construction works in progress, traffic vehicles, and civic activities.

This Regulation shall not be applied to assess vibration encountered in the labor environment or workplace or in the premises of production, construction, trade, and service facilities affected by their own vibration.

1.2. Regulated entities

This Regulation applies to environmental authorities, organizations, and individuals relevant to vibration generation in the territory of the Socialist Republic of Vietnam.

1.3. Interpretation of terms

1.3.1. Vibration in this regulation refers to strong shaking generated by devices, machinery, instruments, tools, and other sources, which affects specific areas and causes discomfort to humans.

1.3.2. Affected areas refer to areas where vibration measurement, monitoring, and control are carried out.

1.3.3. Production, business, and service facilities and civic activities that can cause vibration include:

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1.3.3.2. Production, business, and service facilities and civic activities that do not use devices, machinery, instruments, and tools that generate vibration by capacity, type, and quantity are prescribed in the Appendix enclosed with this Regulation.

1.3.4. Background vibration level refers to the vibration level measured at the measurement location of an affected area when no vibration is generated from the vibration source to be measured.

1.3.5. Vibration classification

- Continuous vibration refers to vibration generated continuously from a determined source within a specific duration without interruption;

- Impulsive vibration refers to vibration that peaks and decays abruptly over a short duration (less than 2 seconds) from a determined vibration source that may recur during the measurement duration;

- Intermittent vibration refers to vibration generated continuously from a determined vibration source that is interrupted for a specific duration, with each vibration generation lasting at least 2 seconds.  Intermittent vibration may be the combination of multiple impulsive vibrations.

1.3.6. Measurement duration refers to the duration used as the vibration generation duration during which the measurement is carried out continuously.

1.3.7. Vibration acceleration A refers to the time derivative of vibration velocity

1.3.8. Root mean square (r.m.s) value of vibration acceleration refers to the root mean square value of acceleration, measured directly using a vibration meter or determined using the following formula:

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a_r.m.s: r.m.s value of vibration acceleration (m/s²)

a(t): vibration acceleration (m/s2)

T: measurement duration (s)

1.3.9. Equivalent peak value (EQ peak) refers to the average of the peak values of vibration acceleration over a specific duration.

1.3.10. Vibration acceleration (VL_A) refers to the unit in dB, calculated using the following formula:

A refers to vibration acceleration measured directly on the meter according to r.m.s or determined using the following formula:

A_n(m/s₂) refers to r.m.s vibration acceleration at frequency n (Hz);

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A₀ = 10^-5 m/s².

1.3.11. Calibrated vibration acceleration level (VL_w) refers to the vibration acceleration level after calibrating influencing factors according to each frequency band. 

1.3.12. Integral equivalent vibration acceleration level (VL_eq) refers to the average value of the calibrated vibration acceleration level over a specific duration. The equivalent vibration acceleration level shall be measured directly on an integral meter or determined using the following formula:

Where:

VL_w (t) refers to the equivalent vibration acceleration level over determined measurement duration (dB);

T: measurement duration.

1.3.13. 90th percentile vibration acceleration level (L90) refers to the vibration acceleration level that is exceeded for 90% of the measurement duration.

1.3.14. Maximum integral equivalent vibration acceleration level (VLmax) refers to the maximum value of the equivalent vibration level over a determined duration.

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2.1. Affected area classification

The classification of affected areas in this Regulation shall be carried out as follows:

2.1.1. Area A includes the following facilities and works:

- Educational institutions according to the Law on Education and vocational education institutions according to the Law on Vocational Education;

- Medical examination and treatment facilities according to the Law on Medical Examination and Treatment; senior care facilities according to the Law on the Elderly;

- Museums and libraries;

- Religious works;

- Offices of agencies of the CPV, National Assembly of Vietnam, Government of Vietnam, and President of Vietnam and offices of Ministries, central authorities, People’s Committees, and affiliates at various levels; headquarters of political organizations, socio-political organizations, and socio-vocational political organizations and headquarters and offices of organizations and individuals.

2.1.2. Area B includes the following facilities and works:

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- Hotels, guesthouses, motels, and other accommodation service establishments.

2.1.3. Area C includes the following facilities and works:

- Outdoor and indoor works of sports;

- Parks;

- Conference centers, theaters, cultural houses, clubs, cinemas, circuses, dance halls, amusement/entertaining works, and other cultural works;

- Livestock, cultivation, and aquaculture facilities.

- Malls, supermarkets, markets, stores, restaurants, and other similar works.

2.1.4. Area D includes the following facilities and works:

- Airport, waterway, and railway terminals, bus stations, and parking lots;

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- National defense and security works that are not used for purposes similar to those of works in areas A, B, and C;

- Other works.

2.2. Permissible maximum value of vibration generated from production, business, and service facilities and civic activities according to Section 1.3.3.1 measured in affected areas

The permissible maximum value of vibration generated from production, business, and service facilities and civic activities according to Section 1 measured in affected areas is prescribed in Table 1.

Table 1. Permissible maximum value of vibration generated from production, business, and service facilities and civic activities according to Section 1.3.3.1

[Unit: dB]

Affected area

Period

Day (06:00 ~ before 22:00)

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...

Area A

60

55

Area B

65

60

Area C

70

65

...

...

...

75

70

Where:

It is permitted to adjust the permissible maximum value threshold for vibration generated from production, business, and service facilities and civic activities according to Section 1.3.3.1 as follows: 

Table 2. Adjustment values of thresholds according to vibration generation duration from production, business, and service facilities and civic activities according to Section 1.3.3.1

Vibration generation duration

Difference in value thresholds in Table 1 allowed to be adjusted

One of the following cases: 

≤ 2 hours during the day 

...

...

...

+10 dB

One of the following cases: 

> 2 hours and ≤ 4 hours during the day   

> 0,75  hour and ≤ 1,5 hours at night

+5 dB

One of the following cases: 

> 4  hours during the day 

> 1,5 hours at night

Apply Table 1

...

...

...

The permissible maximum value of vibration generated from other sources is prescribed in Table 3.

Table 3. Permissible maximum value of vibration generated from other sources

[Unit: dB]

Affected area

Day (06:00 ~ before 22:00)

Night (22:00 ~ before 06:00)

Area A

65

60

...

...

...

70

65

Note:

Where vibration is generated from construction sites in progress during the day, it is permitted to adjust the permissible maximum value threshold for generated vibration levels as follows: 

Table 4. Adjustment values of thresholds according to vibration generation duration during the day from construction sites in progress

Vibration generation duration

Difference in value thresholds in Table 3 allowed to be adjusted

≤ 2 hours per day

+10 dB

...

...

...

+5 dB

> 4  hours during the day

Apply Table 3

2.4. Permissible maximum value for vibration generated from traffic vehicles

The permissible maximum value for vibration generated from traffic vehicles is prescribed in Table 5.

Table 5. Permissible maximum value for vibration generated from traffic vehicles

[Unit: dB]

Affected area

Limit

...

...

...

Night
(22:00 ~ before 06:00)

Area A

65

60

Areas B, C, and D

70

65

2.5. Adjustment value based on background vibration level

Continuous background vibration level measurement shall be carried out in an affected area for at least 5 minutes, using results VL_eq as the background vibration level.

...

...

...

- Where the background vibration level is lower than the generated vibration level, and the difference between the background vibration level and the generation vibration level is lower than 10 dB, apply adjustment values to the vibration level measurement results as follows:

Table 6. Adjustment value of measurement results based on background vibration level

Difference between the vibration level and background vibration level in the measurement area (dB)

3

4 ÷ 5

6 ÷ 9

Adjustment value of the vibration level measurement results (dB)

-3

-2

...

...

...

3. DETERMINATION METHODS

3.1. Vibration level measurement locations

- The measurement location is inside the boundary of an affected area;

- To determine the effect of vibration on public areas and areas where people live and operate, conduct measurement at specific points on the ground, floors, walls, road surfaces, or solid surfaces; it is also permitted to conduct the measurement at locations that may be most affected;

- The measurement location shall have the nature of general representativeness, provide accurate measurement results, and properly reflect the generated vibration.

3.2. Vibration level meters

- The meters must meet the technical characteristics for vibration level measurement; measurement frequency bands of meters must be able to measure vibration levels generated from the operations of production, business, and service facilities and activities causing vibration in domestic activities and vibration levels from traffic vehicles;

- Vibration meters must display the vibration acceleration A, integral equivalent vibration acceleration level (VL_eq), 90th percentile vibration acceleration level (VL₉₀), and maximum integral equivalent vibration acceleration level (VL_max).

3.3. Vibration level measurement conditions

...

...

...

- The vibration measurement surface must be solid, such as concrete, ground, asphalt, or other similar surfaces;

3.4. Vibration level measurement duration

- The measurement duration must be adequate to ensure statistical accuracy and confirm that the measured vibration represents the affected subject being assessed.  The measurement duration must be written in the report.

- Vibration levels shall be measured continuously during the measurement for at least 15 minutes.  When conducting a continuous measurement, use the measurement duration as the vibration generation duration.

- Regarding impulsive vibration, the vibration level measurement shall be carried out for at least 15 minutes.  Where a 15-minute measurement does not obtain 10 measurement values, continue the measurement until there are 10 values.

3.5. Vibration level measurement methods

Vibration shall be measured simultaneously in all 3 perpendicular directions, ensuring that the direction exhibiting the highest vibration level is determined and the respective value is used for assessment. The methods for measuring vibration and shock levels shall comply with the following standards:

- TCVN 6963:2001 – Vibration and shock. Vibration emitted by construction works and factories. Method of measurement;

- TCVN 6964-1:2001 – Mechanical vibration and shock – Evaluation of human exposure to whole-body vibration. Part 1: General requirements;

...

...

...

3.6. Measurement results and conformity assessment

3.6.1. Regarding continuous vibration

The measurement results shall be used as the equivalent vibration acceleration level VLeq during the measurement duration to calculate and assess conformity with this regulation.

3.6.2. Regarding intermittent and impulsive vibration

The measurement results shall be calculated using the arithmetic mean of the peak vibration values from each occurrence regarding intermittent vibration or from each pulse as follows: 

- Measure the vibration levels during the duration where measurement is required and record the values of each occurrence of vibration;

- Determine the peak measurement value of each occurrence of vibration;

- Calculate the arithmetic mean of the peak vibration values from each occurrence of vibration.

The calculation results shall be used to assess conformity with this Regulation.

...

...

...

4.1. The monitoring of vibration levels and use of monitoring results for state management objectives concerning environmental protection shall be carried out by organizations meeting the requirements and conditions for environmental monitoring capacity according to the law.

4.2. When conducting the measurement and assessment of the background vibration level, where the background vibration level measured in the affected area has VLeq higher than the respective level prescribed in this Regulation, refrain from conducting the assessment of vibration generated from the vibration source to be measured and adopt measures to reduce vibration generated to the affected area.  Vibration generation shall be assessed as complying and conforming with this Regulation when the vibration level measurement and monitoring results in the affected area do not exceed the respective permissible value prescribed in Section 2 on technical provisions.

4.3. When the vibration level in affected areas exceeds the respective permissible value prescribed in this Regulation, state management authorities, organizations, and individuals shall adopt measures to reduce the impacts of generated vibration on affected areas.

4.4. The results of the assessment of compliance and conformity with this Regulation shall be the ground for state management authorities to conduct assessment and handling according to the law.

5. RESPONSIBILITIES OF ORGANIZATIONS AND INDIVIDUALS

5.1. Organizations and individuals that may cause vibration shall ensure that the vibration levels generated to affected areas do not exceed the permissible limit prescribed in this Regulation.

5.2. State management authorities shall conduct vibration level measurement and monitoring in affected areas and develop comprehensive plans for vibration control, ensuring compliance with the permissible limit prescribed in this Regulation.

6. IMPLEMENTATION

6.1. Environmental authorities shall instruct, inspect, and supervise the implementation of this Regulation.

...

...

...

APPENDIX

List of types and quantities of devices generating vibration regarding production, business, and service facilities and civic activities

1. Non-hydraulic presses with a capacity of 15kW or more;

2. Grinders (including coarse and fine grinders) with a capacity of 22,5kW or more;

3. Forging machines with a capacity of 22,5kW or more;

4. Rice mills with a capacity of 22,5kW or more;

5. Wood processing machines (planers, cutters, grinders, CNC machines, and drills) with a capacity of 22,5kW or more;

6. Extrusion and injection molding machines with a capacity of 37,5kW or more;

...

...

...

8. At least 4 block and cement brick manufacturing machines.

Note: The capacity of devices, machinery, and tools generating vibration shall be calculated for 1 device. 

QCVN 43:2025/BTNMT

NATIONAL TECHNICAL REGULATION ON SEDIMENT QUALITY

Foreword

QCVN 43:2025/BNNMT is compiled by the Department of Environment, proposed by the Department of Science and Technology, appraised by the Ministry of Science and Technology of Vietnam, and promulgated by the Minister of Agriculture and Environment of Vietnam under Circular No. 01/2025/TT-BNNMT dated May 15, 2025.

QCVN 43:2025/BNNMT replaces QCVN 43:2017/BTNMT.

...

...

...

1. GENERAL PROVISIONS

1.1. Scope

1.1.1. This Regulation provides for the limit values for the quality parameters of surface water sediment and marine sediment.

1.1.2. This Regulation shall be applied to assess and control sediment quality to protect aquatic life

1.2. Regulated entities

This Regulation applies to environmental authorities, organizations, and individuals engaging in environmental monitoring and assessment of sediment quality onshore and in the waters of the Socialist Republic of Vietnam.

1.3. Interpretation of terms

For the purpose of this Regulation, the following terms shall be construed as follows:

1.3.1. Sediment refers to particles of various sizes, shapes, and minerals originating from different sources located at the bottom of the surface water and marine areas. Sediment includes clay, mud, sand, gravel, decomposed organic matter, shells of organisms, and others. Sediment sampling methods shall comply with the regulations on sediment monitoring techniques and determination methods prescribed in this Regulation.

...

...

...

2. TECHNICAL PROVISIONS

The permissible maximum value of sediment quality parameters is prescribed in Table 1.

Table 1: Permissible maximum value of parameters in sediment

No.

Parameter

Unit (according to dry weight)

Limit value

Surface water sediment

Marine sediment

...

...

...

Arsenic (As)

mg/kg

17,0

41,6

2

Cadmium (Cd)

mg/kg

3,5

4,2

...

...

...

Lead (Plumbum) (Pb)

mg/kg

91,3

112

4

Chromium (Cr)

mg/kg

90

160

...

...

...

Copper (Cuprum) (Cu)

mg/kg

197

108

6

Zinc (Zincum) (Zn)

mg/kg

315

271

...

...

...

Iron (Ferrum) (Fe)

mg/kg

20000

20000

8

Mercury (Hydrargyrum) (Hg)

mg/kg

0,5

0,7

...

...

...

Cyanide (CN^-)

mg/kg

0,1

0,1

10

Phenol (C6H5OH)

mg/kg

0,42

0,42

...

...

...

Total Petroleum Hydrocarbons (TPH)

mg/kg

100

100

12

Chlordane (C₁₀H₆Cl₈)

μg/kg

8,9

4,8

...

...

...

DDD (2,2-bis (parachlorophenyl)- 1,1- dichloroethane) (C₁₄H₁₀Cl₄) ⁽¹⁾

μg/kg

8,5

7,8

14

DDE (1,1-Dichloro-2,2- bis(p- chlorophenyl) ethylene) (C₁₄H₈Cl₄) ⁽²⁾

μg/kg

6,8

374,0

...

...

...

DDT (1,1'-(2,2,2-Trichloroethane-1,1- diyl) bis(4-chlorobenzene) (C₁₄H₉Cl₅) ⁽³⁾

μg/kg

4,8

4,8

16

Dieldrin (C₁₂H₈Cl₆O)

μg/kg

6,7

4,3

...

...

...

Endrin (C₁₂H₈Cl₆O)

μg/kg

62,4

62,4

18

Heptachlor epoxide (C₁₀H₅Cl₇O)

μg/kg

2,7

2,7

...

...

...

Lindane (C₆H₆Cl₆)

μg/kg

1,4

1,0

20

Polychlorinated biphenyls (PCBs) ⁽⁴⁾

μg/kg

277

189

...

...

...

Dioxin/Furan (PCDD/PCDF)

ng/kg TEQ

21,5

21,5

22

Polycyclic Aromatic Hydrocarbons (PAHs)

...

...

...

Acenaphthene (C₁₂H₁₀)

μg/kg

88,9

88,9

22.2.

Acenaphthylene (C₁₂H₈)

μg/kg

128

128

...

...

...

Anthracene (C₁₄H₁₀)

μg/kg

245

245

22.4.

Benzo [a] anthracene (C₁₈H₁₂)

μg/kg

385

693

...

...

...

Benzo [a] pyrene (C₂₀H₁₂)

μg/kg

782

763

22.6.

Chrysene (C₁₈H₁₂)

μg/kg

862

846

...

...

...

Dibenz [a,h] anthracene (C₂₂H₁₄)

μg/kg

135

135

22.8.

Fluoranthene (C₁₆H₁₀)

μg/kg

2355

1494

...

...

...

Fluorene (C₁₃H₁₀)

μg/kg

144

144

22.10.

2-Methylnaphthalene (C₁₁H₁₀)

μg/kg

201

201

...

...

...

Naphthalene (C₁₀H₈)

μg/kg

391

391

22.12.

Phenanthrene (C₁₄H₁₀)

μg/kg

515

544

...

...

...

Pyrene (C₁₆H₁₀)

μg/kg

875

1398

Note:

⁽¹⁾ DDD: total of p,p’ and o,p’ isomers;

⁽²⁾ DDE: total of p,p’ and o,p’ isomers;

⁽³⁾ DDT: total of p,p’ and o,p’ isomers;

⁽⁴⁾ PCBs: total concentration of PCB 28; PCB 52; PCB 101; PCB 138; PCB 153; PCB 180.

...

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...

3.1. Monitoring methods for determining the concentration values of parameters in sediment shall comply with Table 2 or technical regulations on environmental monitoring as prescribed by the law.

Table 2. Methods of sampling and determining values of sediment quality parameters

No.

Parameter

Monitoring method and standard number

1

Sampling

TCVN 6663-19:2015;

TCVN 6663-15:2004;

...

...

...

2

Arsenic (As)

TCVN 8467:2010;

US EPA Method 200.7;

US EPA Method 200.8;

US EPA Method 7010;

US EPA Method 7062;

US EPA Method 6020B

3

...

...

...

TCVN 6496:2009;

US EPA Method 200.7;

US EPA Method 200.8;

US EPA Method 7000B;

US EPA Method 7010;

US EPA Method 6020B

4

Lead (Plumbum) (Pb)

5

...

...

...

6

Copper (Cuprum) (Cu)

7

Chromium (Cr)

US EPA Method 200.7;

US EPA Method 200.8;

US EPA Method 7000B;

US EPA Method 7010;

US EPA Method 6020B

...

...

...

Iron (Ferrum) (Fe)

US EPA Method 200.7;

US EPA Method 7000B;

US EPA Method 7010;

US EPA Method 6020B

9

Mercury (Hydrargyrum) (Hg)

TCVN 8882:2011;

US EPA Method 200.8;

...

...

...

US EPA Method 200.7;

US EPA Method 6020B

10

Cyanide

ISO 17380:2013

11

Phenol

ISO 17182:2014;

US EPA Method 8041A

...

...

...

Total Petroleum Hydrocarbons (TPH)

US EPA 8015B

13

Chlordane

US EPA Method 8081B;

US EPA Method 8270D;

US EPA Method 8270E

14

DDD

...

...

...

DDE

16

DDT

17

Dieldrin

18

Endrin

19

Lindane

...

...

...

Heptachlor epoxide

21

Polychlorinated biphenyls (PCBs)

US EPA Method 1668B;

US EPA Method 8270D;

US EPA Method 8270E

22

Dioxin/Furan (PCDD/PCDF)

US EPA Method 1613B;

...

...

...

23

Polycyclic Aromatic Hydrocarbons (PAHs)

US EPA Method 8100;

US EPA Method 8270D;

US EPA Method 8270E

Acenaphthene

Acenaphthylene

...

...

...

Anthracene

Benzo [a] anthracene

Benzo [a] pyrene

Chrysene

Dibenz [a,h] anthracene

...

...

...

Fluoranthene

Fluorene

2-Methylnaphthalene

Naphthalene

Phenanthrene

...

...

...

Pyrene

4. MANAGEMENT PROVISIONS

4.1. The periodic sediment quality monitoring and use of monitoring results for direct provision and announcement of environmental quality information to the community shall be carried out by organizations meeting the requirements and conditions for environmental monitoring capacity according to the law.

4.2. Periodic sediment quality monitoring must be based on monitoring objectives to select appropriate parameters.

5. RESPONSIBILITIES OF ORGANIZATIONS AND INDIVIDUALS

5.1. Organizations and individuals engaging in sediment quality assessment and monitoring under this Regulation shall comply with the prescribed monitoring methods.

5.2. Environmental authorities shall assess sediment quality and adopt management measures according to the law.

6. IMPLEMENTATION

6.1. Environmental authorities shall instruct, inspect, and supervise the implementation of this Regulation.

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Thông tư 01/2025/TT-BNNMT về 03 quy chuẩn kỹ thuật quốc gia về chất lượng môi trường xung quanh do Bộ trưởng Bộ Nông nghiệp và Môi trường ban hành