GB 3095-2026 Ambient air quality standards English, Anglais, Englisch, Inglés, えいご
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ICS 13.220.10
CCS H 57
National Standard of the People's Republic of China
GB/T 3095-2026
Replaces GB/T 3095-2012
Ambient air quality standards
环境空气质量标准
Issue date: 2026-02-13 Implementation date: 2026-03-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Applicable Scope
2 Normative References
3 Terms and Definitions
4 Classification of Ambient Air Functional Zones and Quality Requirements
5 Monitoring
6 Validity Provisions for Data Statistics
7 Implementation and Supervision
Annex A (Informative Annex) Reference Concentration Limits for Cadmium, Mercury, Arsenic, Hexavalent Chromium, and Fluorides in Ambient Air
Ambient Air Quality Standards
1 Applicable Scope
This standard specifies the classification of ambient air functional zones, standard grading, pollutant items, averaging times and concentration limits, monitoring methods, validity provisions for data statistics, and implementation and supervision.
This standard is applicable to the evaluation and management of ambient air quality.
2 Normative References
The following documents or clauses therein are referenced in this standard. For dated references, only the edition cited applies to this standard. For undated references, the latest edition (including any amendments) applies to this standard. If other documents are repealed, modified, or revised by new documents, the new documents apply to this standard.
GB/T 9801, Ambient air - Determination of carbon monoxide - Non-dispersive infrared method
HJ 193, Technical specification for installation and acceptance of continuous automatic monitoring system for gaseous pollutants (SO₂, NO₂, O₃, CO) in ambient air
HJ 194, Technical specification for manual monitoring of ambient air quality
HJ 479, Ambient air - Determination of nitrogen oxides (nitric oxide and nitrogen dioxide) - N-(1-naphthyl)ethylenediamine dihydrochloride spectrophotometric method
HJ 482, Ambient air - Determination of sulfur dioxide - Formaldehyde absorbing-pararosaniline spectrophotometric method
HJ 504, Ambient air - Determination of ozone - Indigo disulfonate spectrophotometric method
HJ 539, Ambient air - Determination of lead - Graphite furnace atomic absorption spectrophotometric method
HJ 590, Ambient air - Determination of ozone - Ultraviolet photometric method
HJ 618, Ambient air - Determination of PM₁₀ and PM₂.₅ - Gravimetric method
HJ 630, Technical guideline for quality management of environmental monitoring
HJ 646, Ambient air and stationary source emission - Determination of polycyclic aromatic hydrocarbons in gas and particulate phase - Gas chromatography/mass spectrometry
HJ 647, Ambient air and stationary source emission - Determination of polycyclic aromatic hydrocarbons in gas and particulate phase - High performance liquid chromatography
HJ 653, Technical requirements and test procedures for continuous automatic monitoring system of ambient air particulate matter (PM₁₀ and PM₂.₅)
HJ 654, Technical requirements and test procedures for continuous automatic monitoring system for gaseous pollutants (SO₂, NO₂, O₃, CO) in ambient air
HJ 655, Technical specification for installation and acceptance of continuous automatic monitoring system of ambient air particulate matter (PM₁₀ and PM₂.₅)
HJ 657, Ambient air and stationary source emission - Determination of metal elements in particulate matter - Inductively coupled plasma mass spectrometry
HJ 664, Technical specification for siting of ambient air quality monitoring points (on trial)
HJ 777, Ambient air and stationary source emission - Determination of metal elements in particulate matter - Inductively coupled plasma optical emission spectrometry
HJ 817, Technical specification for operation and quality control of continuous automatic monitoring system of ambient air particulate matter (PM₁₀ and PM₂.₅)
HJ 818, Technical specification for operation and quality control of continuous automatic monitoring system for gaseous pollutants (SO₂, NO₂, O₃, CO) in ambient air
HJ 829, Ambient air - Determination of inorganic elements in particulate matter - Energy dispersive X-ray fluorescence spectrometry
HJ 830, Ambient air - Determination of inorganic elements in particulate matter - Wavelength dispersive X-ray fluorescence spectrometry
HJ 956, Ambient air - Determination of benzo[a]pyrene - High performance liquid chromatography
HJ 965, Ambient air - Automatic determination of carbon monoxide - Non-dispersive infrared 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 particulate - Gravimetric method
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1
ambient air
The outdoor air to which people, plants, animals, and structures are exposed.
3.2
total suspended particle (TSP)
Particles in ambient air with an aerodynamic diameter less than or equal to 100 μm.
3.3
lead
Lead and its compounds present in total suspended particles.
3.4
particulate matter (PM₁₀)
Particles in ambient air with an aerodynamic diameter less than or equal to 10 μm, also known as inhalable particulate matter.
3.5
particulate matter (PM₂.₅)
Particles in ambient air with an aerodynamic diameter less than or equal to 2.5 μm, also known as fine particulate matter.
3.6
lead
Lead and its compounds present in total suspended particles.
3.7
benzo[a]pyrene (BaP)
Benzo[a]pyrene present in particulate matter (particle size ≤ 10 μm).
3.8
1-hour average
The arithmetic average of pollutant concentrations over any 1-hour period.
3.9
8-hour average
The arithmetic average of average concentrations over 8 consecutive hours, also known as the 8-hour moving average.
3.10
maximum daily 8-hour average
The maximum value of the 8-hour moving average within a calendar day.
3.11
daily average
The arithmetic average of 24-hour average concentrations over a calendar day, also known as the 24-hour average.
3.12
monthly average
The arithmetic average of daily average concentrations within a calendar month.
3.13
quarterly average
The arithmetic average of daily average concentrations within a calendar quarter.
3.14
annual mean
The arithmetic average of daily average concentrations within a calendar year.
3.15
reference state
The state when the atmospheric temperature is 298.15 K and the atmospheric pressure is 1013.25 hPa.
3.16
reference method
National ecological environment standard method serving as the basis for evaluating the equivalence of ambient air pollutant monitoring methods.
3.17
equivalent method
An ecological environment monitoring method confirmed, through equivalence evaluation organized by the competent department of ecological environment under the State Council, to be equivalent to the reference method specified in this standard.
4 Classification of Ambient Air Functional Zones and Quality Requirements
4.1 Classification of Ambient Air Functional Zones
Ambient air functional zones are divided into two categories: Category I zones are national parks, nature reserves, natural parks, and other areas requiring special protection; Category II zones are residential areas, mixed commercial-traffic-residential areas, cultural areas, industrial areas, and rural areas.
4.2 Quality Requirements for Ambient Air Functional Zones
Category I zones apply Class I concentration limits, and Category II zones apply Class II concentration limits. The quality requirements for Category I and Category II ambient air functional zones are specified in Table 1 and Table 2.
