GB 3095-2026 Ambient air quality standards English, Anglais, Englisch, Inglés, えいご
ICS 13. 040. 20
CCS Z 50
National Standard of the People’s Republic of China
GB 3095-2026
Replaces GB 3095-2012
Ambient air quality standards
环境空气质量标准
(English translation)
Issue date: 2026-02-13 Implementation date: 2026-03-01
Issued by the Ministry of Ecology and Environment of the People's Republic of China
the State Administration for Market Regulation of the People's Republic of China
Contents
Foreword II
1 Scope of application 1
2 Normative references 1
3 Terms and definitions 2
4 Classification and quality requirements of ambient air functional zones 3
5 Monitoring 4
6 Validity requirements for data statistics 6
7 Implementation and supervision 6
Annex A (Informative) Reference concentration limits for cadmium, mercury, arsenic, hexavalent chromium, and fluoride in ambient air 7
Ambient air quality standards
1 Scope of application
This standard specifies the classification of ambient air functional zones, standard grading, pollutant items, average time and concentration limits, monitoring methods, validity requirements for data statistics, as well as implementation and supervision.
This standard applies to the assessment and management of ambient air quality.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies. For other documents that are abolished, revised or revised by new documents, the new ones shall apply to this standard.
GB/T 9801 Air quality - Determination of carbon monoxide - Non-dispersive infrared spectrometry
HJ 193 Technical Specifications for Installation and Acceptance of Ambient air Quality Continuous Automated Monitoring System for SO₂, NO₂, O₃, CO
HJ/T 194 Technical specifications on manual methods for ambient air quality monitoring
HJ 479 Ambient air - Determination of nitrogen oxides-N-(1-Naphthyl) ethylene diamine dihydrochloride spectrophotometric method
HJ 482 Ambient air - Determination of sulfur dioxide - Formaldehyde absorbing-pararosaniline spectrophotometry
HJ 504 Ambient air - Determination of ozone - Indigo disulphonate spectrophotometry
HJ 539 Ambient air - Determination of lead - Graphite furnace atomic absorption spectrometry
HJ 590 Ambient air - Determination of ozone - Ultraviolet photometric method
HJ 618 Determination of atmospheric articles PM10 and PM2.5 in ambient air by gravimetric method
HJ/T 630 Technical guideline on environmental monitoring quality management
HJ 646 Ambient air and stationary source emissions - Determination of gas and particle-phase polycyclic aromatic hydrocarbons with gas chromatography/mass spectrometry
HJ 647 Ambient air and stationary source emissions - Determination of gas and particle-phase polycyclic aromatic hydrocarbons - High performance liquid chromatography
HJ653 Specifications and test procedures for ambient air quality continuous automated monitoring system for PM10 and PM2.5
HJ 654 Specifications and Test Procedures for Ambient Air Quality Continuous Automated Monitoring System for SO2, NO2, O3 and CO
HJ 655 Technical Specifications for Installation and Acceptance of Ambient Air Quality Continuous Automated Monitoring System for PM10 and PM2.5
HJ 657 Ambient air and stationary source emission - Determination of metals in ambient particulate matter – Inductively coupled plasma/mass spectrometry (ICP-MS)
HJ 664 Technical regulation for selection of ambient air quality monitoring stations (on trial)
HJ 777 Ambient air and waste gas from stationary sources emission - Determination of metal elements in ambient particle matter-Inductively coupled plasma optical emission spectrometry
HJ 817 Technical specifications for operation and quality control of ambient air qualityautomated monitoring system for particulate matter (PM10 and PM2.5)
HJ 818 Technical specifications for operation and quality control of ambient air quality continuous automated monitoring system for SO₂, NO₂, O₃, CO
HJ 829 Ambient air -Determination of inorganic elements in ambient particle matter - Energy dispersive X-ray fluorescence spectroscopy (ED-XRF) method
HJ 830 Ambient air - Determination of inorganic elements in ambient particle matter - Wavelength dispersive X-ray fluorescence spectroscopy (WD-XRF) method
HJ 956 Air quality - Determination of benz[a]pyrene in ambient air - High performance liquid chromatography
HJ 965 Ambient air - Automatic determination of carbon monoxide - Non-dispersive infrared spectrometry method
HJ 1043 Ambient air - Automatic determination of nitrogen oxides - Chemiluminescence method
HJ 1044 Ambient air - Automatic determination of sulfur dioxide - Ultraviolet fluorescence method
HJ 1225 Ambient air - Automatic determination of ozone - Chemiluminescence method
HJ 1263 Ambient air - Determination of total suspended particle - Gravimetric method
3 Terms and definitions
For the purposes of this standard, the following terms and definitions apply:
3.1
ambient air
outdoor air to which people, plants, animals, and buildings are exposed
3.2
total suspended particle (TSP)
particulate matter having an aerodynamic equivalent diameter of 100μm or less in ambient air
3.3
particulate matter (PM10)
particulate matter with an aerodynamic equivalent diameter of 10 μm or less in ambient air, also referred to as inhalable particulate matter
3.4
particulate matter (PM2.5)
particulate matter with the aerodynamic equivalent diameter of 2.5μm or less in ambient air, also referred to as fine particulate matter
3.5
lead
lead and its compounds present in total suspended particles
3.6
benzo[a]pyrene (BaP)
benzo[a]pyrene present in particulate matter (particle size of 10 μm or less)
3.7
1-hour average
arithmetic mean of pollutant concentrations in any 1 hour
3.8
8-hour average
arithmetic mean of average concentrations over 8 consecutive hours, also referred to as 8-hour moving average
3.9
maximum daily 8-hour average
maximum value of the 8-hour moving average within a natural day
3.10
daily average
arithmetic mean of average concentrations over 24 hours within a natural day, also referred to as 24-hour moving average
3.11
monthly average
arithmetic mean of daily average concentrations within a calendar month
3.12
quarterly average
arithmetic mean of daily average concentrations within a calendar quarter
3.13
annual mean
arithmetic mean of daily average concentrations within a calendar year
3.14
reference state
state where the atmospheric temperature is 298.15 K and the atmospheric pressure is 1013.25 kPa
3.15
reference method
national ecological environment standard method used as the basis for equivalence assessment of ambient air pollutant monitoring method
3.16
equivalent method
ecological environment monitoring method confirmed to be equivalent to the reference method specified in this standard through equivalence assessment organized by the competent department of ecological environment under the State Council
4 Classification and quality requirements of ambient air functional zones
4.1 Classification of ambient air functional zones
Ambient air functional zones can be classified into two types: Zone I includes national parks, nature reserves, natural parks, and other areas requiring special protection. Zone II includes residential areas, mixed commercial and residential areas, cultural zones, industrial zones, and rural areas.
4.2 Quality requirements of ambient air functional zones
Grade I concentration limits apply to Zone I, and Grade II concentration limits apply to Zone II. For the quality requirements for Zone I and Zone II ambient air functional zones, see Table 1 and Table 2.
Contents
Foreword II
1 Scope of application
2 Normative references
3 Terms and definitions
4 Classification and quality requirements of ambient air functional zones
5 Monitoring
6 Validity requirements for data statistics
7 Implementation and supervision
Annex A (Informative) Reference concentration limits for cadmium, mercury, arsenic, hexavalent chromium, and fluoride in ambient air
