Air Quality

Air, Noise and Water Monitoring Network

Air Quality Monitoring

With the increased industrial and commercial activities in the vicinity of major cities, the quality of the ambient air is being affected by emissions from the industries and from the ever increasing vehicular population. As per the provision of Air (Prevention and Control of Pollution) Act, 1981, the entire state of Tamil Nadu has been declared as an air pollution control area.

Ambient Air Quality Monitoring Programme at Chennai

Tamil Nadu Pollution Control Board is operating eight ambient air quality monitoring stations in Chennai under National Air Quality Monitoring Programme (NAMP) funded by Central Pollution Control Board.

The eight ambient air quality monitoring stations in Chennai are:

S.No.Station locationLand Use Zone / Area
(i) Kathivakkam industrial area
(ii) Manali industrial area
(iii) Thiruvottiyur industrial area
(iv) Kilpauk commercial (traffic inter-section)
(v) Thiyagaraya Nagar commercial (traffic inter-section)
(vi) Nungambakkam commercial (traffic inter-section)
(vii) Anna Nagar residential area
(viii) Adyar residential area

All the above stations are functioning on 24 hours basis, twice a week. The samples collected from NAMP stations are analysed for the Respirable Suspended Particulate Matter (RSPM) (RSPM is particulate matter less than 10 microns) and gaseous pollutants such as Sulphur di oxide (SO2) and Nitrogen di Oxides (NO2).

The National Ambient Air Quality Standards prescribed is given below:

Area Annual average concentrations of pollutants in µg/m3
SO2NO2RSPM
Industrial Residential, Rural & other areas 50 40 60

Ambient Air Quality Monitoring in Thoothukudi, Coimbatore, Selam, Madurai, Trichy, Cuddalore and Mettur.

At Thoothukudi, ambient air quality stations have been functioning under NAMP from the year 1988 in the following locations.

a Raja Agencies Industrial zone
b SIPCOT Industrial zone
c A.V.M. Building Mixed zone

At Coimbatore, the ambient air quality stations have been functioning under NAMP from the year 1991 in the following locations.

a District Collector's Office Mixed zone
b Ponniyaraja puram Residential zone
c SIDCO Building Industrial zone

At Salem, the ambient air quality station has been functioning under NAMP in the following location from 1996 onwards in the following station.

a Sowdeswari College Mixed zone

At Madurai, the ambient air quality stations have been functioning under NAMP from 1996 in the following locations.

a Highways Project Building Residential zone
b M/s.Susee Cars and trucks Co., Ltd Industrial zone
c Madurai Corporation Office (SZ) Mixed zone

At Trichy, the ambient air quality stations have been functioning under NAMP from 2012 in the following locations.

a Gandhi Market Commercial zone
b Main Guard Gate ITraffic intersection
c Bishop Heber College Mixed zone
d Golden rock Residential zone
e Central bus stand Traffic intersection

At Cuddalore, the ambient air quality stations have been functioning under NAMP from 2013 in the following locations.

a Echankadu Village Residential zone
b DEE Office Commercial zone
c SIPCOT Industrial zone

At Mettur, the ambient air quality stations have been functioning under NAMP from 2013 in the following locations.

a Raman Nagar Residential zone
b SIDCO Industrial zone

All the above monitoring stations under NAMP, functions on a 24 hour basis, twice a week. The samples collected from NAMP stations are analysed for the RSPM and gaseous pollutants sulphur dioxide and nitrogen dioxide.