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CPCB
Standards

for AAQMS
AAQMS

Sulphur Dioxide
SO2

Annual Limit: 50 µg/m³
Daily Limit: 80 µg/m³

NitrogenDioxide
NO2

Annual Limit: 40 µg/m³
Daily Limit: 80 µg/m³

Particulate matter
PM - 10

Annual Limit: 60 µg/m³
Daily Limit: 100 µg/m³

Particulate matter
PM - 2.5

Annual Limit: 40 µg/m³
Daily Limit: 60 µg/m³

Ozone
O3

8 hours Limit: 60 µg/m³
1 hour Limit: 120 µg/m³

Lead
Pb

Annual Limit: 0.50 µg/m³
Daily Limit: 1.0 µg/m³

Carbon Monoxide
CO

8 hours Limit: 02 µg/m³
1 hour Limit: 04 µg/m³

Ammonia
NH3

Annual Limit: 100 µg/m³
Daily Limit: 400 µg/m³

Benzene
C₆H₆.

Annual Limit: 05 µg/m³

Benzo(o)Pyrene
BaP

Annual Limit: 01 ng/m³
(particulate phase only)

Arsenic
As

8 hours Limit: 06 ng/m³

Nickel
Ni

Annual Limit: 20 ng/m³

CPCB
Standards

(No. B-29016/20/90/PCI-L)
{ADVT-III/4/184/09/Exty.}

Note:- CPCB - Central Pollution Control Board Standards for National Ambient Air Quality Standards. (No. B-29016/20/90/PCI-L) {ADVT-III/4/184/09/Exty.}