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GB 3095-2012: [Including 2018XG1] Ambient air quality standards
GB 3095-2012
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 13.040.20
Z 50
Replacing GB 3095-1996, GB 9137-88
Ambient air quality standards
[Including Amendment List 2018XG1]
ISSUED ON. FEBRUARY 29, 2012
IMPLEMENTED ON. JANUARY 01, 2016
Issued by. Ministry of Environmental Protection of PRC;
General Administration of Quality Supervision, Inspection and
Quarantine of PRC.
Table of Contents
Foreword ... 4 
1 Scope ... 6 
2 Normative references ... 6 
3 Terms and definitions ... 7 
4 Classification of ambient air functional zone and quality requirements ... 9 
5 Monitoring ... 11 
6 Validity of data statistics ... 12 
7 Implementation and supervision ... 13 
Appendix A (Informative) Reference concentration limits for cadmium, mercury,
arsenic, hexavalent chromium, fluoride in ambient air ... 15 
Amendment List [2018XG1] ... 16 
Ambient air quality standards
1 Scope
This standard specifies the classification of ambient air functional zones,
standard grading, pollutant items, average time and concentration limits,
monitoring methods, validity of data statistics, implementation and supervision.
This standard applies to the assessment and management of ambient air quality.
2 Normative references
This standard refers to the following documents or their terms. For the undated
documents, only the latest version is applicable to this standard.
GB 8971 Air quality - Determination of benzo(α) pyrene in flying dust -
Acetylated paper chromatography fluorescence spectrophotometric method
GB 9801 Air quality - Determination of carbon monoxide - Non-dispersive
infrared spectrometry
GB/T 15264 Ambient air - Determination of lead - Flame atomic absorption
spectrophotometric method
GB/T 15432 Ambient air - Determination of total suspended particulates -
Gravimetric method
GB/T 15439 Air quality - Determination of benzo[a]pyrene in ambient air -
High performance liquid chromatography
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 483 Ambient air - Determination of sulfur dioxide in ambient air -
Tetrachloromercurate (TCM)-pararosaniline method
HJ 504 Ambient air - Determination of ozone - Indigo disulphonate
spectrophotometry
HJ 539 Ambient air - Determination of lead - Graphite furnace atomic
Particulate matter (particle size less than or equal to 2.5 μm) (PM2.5)
Refers to particulate matter in ambient air which has an aerodynamic
equivalent diameter less than or equal to 2.5 μm, also known as respirable
particulate matter.
3.5
Lead
Refers to lead and its compounds as presented in total suspended particle.
3.6
Benzo[a]pyrene (BaP)
Refers to benzo[a]pyrene as presented in particulate matter (particle size
less than or equal to 10 μm).
3.7
Fluoride
Refers to inorganic fluorides as presented in the form of gaseous particulate
forms.
3.8
1-hour average
Refers to the arithmetic mean of pollutant concentration per any 1-hour.
3.9
8-hour average
Refers to the arithmetic mean of the average concentration for 8 consecutive
hours, also known as the 8-hour moving average.
3.10
24-hour average
Refers to the arithmetic mean of the average concentration for 24-hour of a
natural day, also known as the daily average.
3.11
Monthly average
Particulate
matter
(PM10)
Determination of atmospheric articles PM10
and PM2.5 in ambient air by gravimetric
method
HJ 618 Micro-oscillation balance method, β-ray method
Particulate
matter
(PM2.5)
Determination of atmospheric articles PM10
and PM2.5 in ambient air by gravimetric
method
HJ 618 Micro-oscillation balance method, β-ray method
Total
suspended
particle
(TSP)
Ambient air - Determination of total
suspended particulates -Gravimetric method
GB/T
15432 -
Nitrogen
oxides
(NOx)
Ambient air - Determination of nitrogen
oxides-N-(1-naphthyl) ethylene diamine
dihydrochloride spectrophotometric method
HJ 479
Chemiluminescence method,
differential absorption
spectroscopy
9 Lead (Pb)
Ambient air - Determination of lead - Graphite
furnace atomic absorption spectrometry
(provisional)
HJ 539 -
Ambient air - Determination of lead - Flame
atomic absorption spectrophotometric
method
GB/T
15264 -
Benzo[a]
pyrene
(BaP)
Air quality - Determination of benzo(α) pyrene
in flying dust - Acetylated paper
chromatography fluorescence
spectrophotometric method
GB 8971 -
Air quality - Determination of benzo[a]pyrene
in ambient air -High performance liquid
chromatography
GB/T
15439 -
6 Validity of data statistics
6.1 It shall take measures to ensure the accuracy, continuity and completeness
of the monitoring data, to ensure a comprehensive and objective reflection of
the monitoring results. All valid data shall be subjected to statistics and
evaluations. It shall neither selectively discard the adverse data nor artificially
intervene the monitoring and evaluation results.
6.2 When using the automatic monitoring equipment for monitoring, the
monitoring equipment shall be operated continuously for 365 days (366 days in
leap-year). When the continuous monitoring data cannot be obtained due to
calibration of monitoring instrument, power outages, equipment failures, or
other irresistible factors, it shall take effective measures to recover the data in
time.
6.3 The determination and processing of abnormal values shall comply with the
provisions of HJ 630. For the missing and deleted data during the monitoring