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Technical Regulation on Ambient Air Quality Index (on trial)
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HJ 633-2012: PDF in English HJ 633-2012
National Environmental Protection Standard
of the People’s Republic of China
HJ 633−2012
Technical Regulation on Ambient Air Quality
Index (on trial)
ISSUE ON. FEBRUARY 29, 2012
IMPLEMENTED ON. JANUARY 1, 2016
Issued by. Ministry of Environmental Protection
Announcement of Ministry of Environmental Protection of the
People’s Republic of China
[2012] No. 8
To implement the "Environmental Protection Law of the People’s Republic of China"
and "Atmospheric Pollution Prevention Law of the People's Republic of China”,
protect the environment, protect human health, provide health advice to the public, it
is now approving and publishing “Technical Regulation on Ambient Air Quality Index
(on trial)” as a national environmental standard.
Standard name and number are as follows.
Technical regulation on ambient air quality index (on trial) (HJ 633-2012)
This Standard shall be implemented simultaneously with "Ambient Air Quality Standards” (GB
3095-2012); it is published by the China Environmental Science Press; content of this Standard
can be found at the website of the Ministry of Environmental Protection (bz.mep.gov.cn).
Notice is hereby given.
February 29, 2012
Table of Contents
Foreword ... 4
1 Application Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 Calculation methods of Air Quality Index ... 6
5 Publishing of daily report and real-time report ... 9
6 Other Requirements ... 10
Appendix A ... 13
References and Original Chinese Documents ... 14
Foreword
To implement the "Environmental Protection Law of the People's Republic of China", "Air
Pollution Prevention Law of the People's Republic of China" and other laws, to regulate daily
report and real-time report of ambient air quality, this Standard is drafted.
This Standard is based on "Ambient Air Quality Standards”; and specifies the
requirements and procedures for daily report and real-time report of ambient air quality index.
The concentration of pollutants in this Standard refers to mass concentration.
Appendix A of this Standard is normative.
This Standard was organized and developed by the Division of Science and Technology of
Ministry of Environmental Protection.
Main drafting organizations of this Standard. China National Environmental Monitoring
Center, Chinese Research Academy of Environmental Sciences, Dalian Municipal
Environmental Monitoring Center, Shanghai Environmental Monitoring Center,
Shenzhen Municipal Environmental Monitoring Center, Jiangsu Province Environmental
Monitoring Center, Hangzhou Environmental Monitoring Center, Chongqing Municipal
Environmental monitoring Center.
This Standard was approved by Ministry of Environmental Protection on February 29, 2012.
This Standard shall be implemented simultaneously with "Ambient Air Quality Standards” (GB
3095-2012).
This Standard shall be explained by the Ministry of Environmental Protection.
Technical Regulation on Ambient Air Quality
Index (on trial)
1 Application Scope
This Standard specifies classification scheme and calculation methods of ambient air
quality index; ambient air quality levels and categories; and requirements of
publishing content of daily report and real-time report, publishing formats and other
relevant information of ambient air quality index.
This Standard applies to ambient air quality index’s daily report, real-time report and
forecasting, it is used to provide health advice to the public.
2 Normative references
The following documents or their provisions are referenced in this Standard. For
undated references, the latest versions apply to this Standard.
GB 3095 Ambient Air Quality Standards
HJ/T 193 Automated methods for ambient air quality monitoring
"Ambient Air Quality Monitoring (on trial)" (SEPA Notice No. 4 of 2007)
3 Terms and definitions
The following terms and definitions apply to this Standard.
3.1 Air quality index (AQI)
The dimensionless index which quantitatively describes the status of air quality.
3.2 Individual air quality index (IAQI)
indicators.
5.1.4 When calculating air quality index of each monitoring site, the air quality
sub-index and air quality index of each pollutant shall use the corresponding site’s
pollutant concentration, the concentration limits in Table l, formula (1) and Formula (2)
to calculate.
5.1.5 Data of daily report and real-time report shall be preliminarily audited by the Air
Quality Index Daily Report Software System. Data of daily report and real-time report
is only the reference data of the specific day. Monthly data shall be revised and
confirmed in early following month according to the complete audit procedure.
5.2 Format of publishing data
5.2.1 Data of daily report of Air Quality Index shall conform to the requirements in
Table 3.
5.2.2 Data of real-timey report of Air Quality Index shall conform with the
requirements in Table 4.
6 Other Requirements
6.1 Layout and adjustment of monitoring sites, setting of monitoring frequency,
statistics and process of monitoring data relevant to ambient air quality monitoring
and evaluation shall be executed according to "Ambient Air Quality Monitoring
Regulations (Trial)", HJ/T 193, other related standards and other normative
documents.
6.2 Calculation results of Ambient Air Quality Index and air quality sub-index shall all
be rounded up to integer, decimal shall not be retained.
6.3 This Standard shall be used simultaneously with GB 3095-2012.
6.4 When evaluating if ambient air quality meets the requirements, it shall be
executed in accordance with the provisions of GB 3095.
Table 4 Data format of real-time report of Air Quality Index
Time. 20xx Year xx Month xx Day xx Hour
Na
me
of
city
Na
me
of
mo
nito
ring
site
Pollutant concentration and air quality sub-index (IAQI) Air
quality
index
(AQI)
Prim
ary
pollut
ants
Clas
s of
air
qualit
index
Category of
air quality
index Sulfur dioxide
(SO2)
1-hour
average
Nitrogen
dioxide
(NO2) 1-hour
average
Particulate
matter
(particle
diameter
equal or less
than 10μm)
1-hour
average
Particulate
matter
(particle
diameter
equal or less
than 10μm)
24-hour
moving
average
Carbon
monoxide
(CO) 1-hour
average
Ozone (O3)
1-hour
average
Ozone (O3)
8-hour
moving
average
Particulate
matter
(particle
diameter
equal or
less than
2.5μm)
1-hour
average
Particulate
matter
(particle
diameter
equal or less
than 2.5μm)
24-hour
moving
average
Conc
entrat
ion /
(μg/m
3)
Sub
-ind
ex
Conc
entrat
ion /
(μg/m
3)
Sub
-ind
ex
Conc
entrat
ion /
(μg/m
3)
Sub
-ind
ex
Conc
entrat
ion /
(μg/m
3)
Sub
-ind
ex
Conc
entrat
ion /
(μg/m
3)
Sub
-ind
ex
Conc
entrat
ion /
(μg/m
3)
Sub
-ind
ex
Conc
entrat
ion /
(μg/m
3)
Sub
-ind
ex
Cate
gory
Col
or
Note. Concentration and sub-index of missing-tested indicator shall use “NA” to indicate.
References and Original Chinese Documents
[1] HJ 633-2012 Technical Regulation on Ambient Air Quality Index (on trial).
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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