S. No. |
Parameter
|
Revised
Standards |
|
|
Existing
Standards |
Into
Inland Waters |
Into
Sewage Treatment (b) |
Into
Sea (b) |
1 |
Temperature
or Temperature Increase |
40oC
|
3oC
|
3oC
|
3oC
|
2 |
PH
value |
6-10
|
6-9
|
6-9
|
6-9
|
3 |
Biocherhical
Oxygen Demand (BOD), at 20oC(1)
|
80
|
80
|
250
|
80*
|
4 |
Chemical
Oxygen Demand (COD) (1) |
150
|
150
|
400
|
400
|
5 |
Total
suspended solid (TTS) |
150
|
200
|
400
|
200
|
6 |
Total
dissolved solids (TDS) |
3500
|
3500
|
3500
|
3500
|
7 |
Grease
and Oil |
10
|
10
|
10
|
10
|
8 |
Phenolic
compounds (as phenol) |
0.1
|
0.1
|
0.3
|
0.3
|
9 |
Chloride
(as CI) |
1000
|
100
|
100
|
SC***
|
10
|
Fluoride
(as F) |
20
|
10
|
10
|
10
|
11
|
Cyanide
(as CN) total |
2 |
1.0
|
1.0
|
1.0
|
12
|
An-ionic
detergents (as MB as) |
20
|
20
|
20
|
20
|
13
|
Sulphate
(SO)-4 |
600
|
600
|
1000
|
SC***
|
14
|
Sulphide
(S)-2 |
1.0
|
1.0
|
1.0
|
1.0
|
15
|
Ammonia
(NH3) |
40
|
40
|
40
|
40
|
16
|
Pesticide
(3) |
0.15
|
0.15
|
0.15
|
0.15
|
17
|
Cadmium
(1) |
0.1
|
0.1
|
0.1
|
0.1
|
18
|
Chromium
trivalent and hexavalent (1) |
1.0
|
1.0
|
1.0
|
1.0
|
19
|
Copper
(1) |
1.0
|
1.0
|
1.0
|
1.0
|
20
|
Lead
(1) |
0.5
|
0.5
|
0.5
|
0.5
|
21
|
Mercury
(4) |
0.01
|
0.01
|
0.01
|
0.01
|
22
|
Selenium (1) |
0.5
|
0.5
|
0.5
|
0.5
|
23
|
Nickel
(1) |
1.0
|
1.0
|
1.0
|
1.0
|
24
|
Silver
(4) |
1.0
|
1.0
|
1.0
|
1.0
|
25
|
Total
Toxic metals |
2.0
|
2.0
|
2.0
|
2.0
|
26
|
Zinc
|
5.0
|
5.0
|
5.0
|
5.0
|
27
|
Arsenic
(1) |
1.0
|
1.0
|
1.0
|
1.0
|
28
|
Barium
(1) |
1.5
|
1.5
|
1.5
|
1.5
|
29
|
Iron
|
2.0
|
8.0
|
8.0
|
8.0
|
30
|
Manganese
|
1.5
|
1.5
|
1.5
|
1.5
|
31
|
Boron
(1) |
6.0
|
6.0
|
6.0
|
6.0
|
32
|
Chlorine
|
1.0
|
1.0
|
1.0
|
1.0
|
Explanation
Assuming minimum dilution
1 ; 10 on discharge, lower ratio would
attract progressively stringent standards
to be determined by the Federal
Protection Agency. By 1 ; 10 Dilution
means, for example that
for each one cubic meter of treated
effluent, the recipient body should
have 10 cubic meter of water
for dilution of this effluent.
Modified Benzene Alkyl
Sulphate; assuming surfacetant as biodegradable.
Pesticide include herbicides,
fungicides, and insecticides.
Subject to total toxic
metal discharge should not exceed level
given at S.No. 25
Applicable only when
and where sewage treatment is operational
and BOD =80 mg/l is achieved by the
sewage treatment
system.
Provided discharge
is not at shore and not within 10 miles
of mangrove or other important estuaries.
* The effluent should not result in
temperature increase of more than 30C
at the edge of the zone where initial
mixing and dilution take place in the
receiving body. In case zone is not
defined, use 100 meters from the point
of discharge.
** The value for industry is 200 mg/l.
*** Discharge concentration at or below
sea concentration (SG)
Note:
1. A Dilution of liquid effluents
to bring them to the NEQS limiting value
is not permissible through fresh water
mixing with the effluents before discharging
into the environment.
2. The concentration of pollutants in
water being used will be subtracted
from the effluent for calculating the
NEQS limits" and
(2) for Annex II. The following shall
be substituted, namely: -
NATIONAL ENVIRONMENTAL QUALITY STANDARDS
FOR INDUSTRIAL GASEOUS EMISSION
(mg/Nm3, UNLESS OTHER- WISE
DEFINED)
S. No. |
Parameters
|
Source
of Emission |
Existing
Standards |
Revised
Standard |
1 |
Smoke
|
Smoke
opacity not to exceed |
40%
or 2 Ringlemann Scale |
40%
OR 2 Ringlemann Scale or equivalent
smoke no. |
2 |
Particulate
mater (‘) |
(a)
Boilers and Furnaces
(i)
Oil fired
(ii)
Coal fired
(iii)
Cement Kilns
(b) Grinding crushing clinker
coolers and related processes,
metallurgical processes, converters,
blast furnaces and cupolas |
300
500
200
500 |
300
500
300
500 |
3 |
Hydrogen
Chloride |
Any
|
400
|
400
|
4 |
Chlorine
|
Any
|
150
|
150
|
5 |
Hydrogen
fluoride |
Any |
150
|
150
|
6 |
Hydrogen
sulphide |
Any
|
10
|
10
|
7 |
Sulphur
Oxides (2)(3) |
Sulfuric
acid / sulphonic acid plants.
Other plants except power plants
operating on oil and coal |
400
400 |
5000
1700 |
8 |
Carbon
monoxide |
Any
|
800
|
800
|
9 |
Lead
|
Any
|
50
|
50
|
10
|
Mercury
|
Any
|
10
|
10
|
11
|
Cadmium
|
Any
|
20
|
20
|
12
|
Arsenic
|
Any
|
20
|
20
|
13
|
Copper
|
Any
|
50
|
50
|
14
|
Antimony
|
Any
|
20
|
20
|
15
|
Zinc
|
Any
|
200
|
200
|
16
|
Oxides
of Nitrogen (3) |
Nitric
acid manufacturing unit
Other plants except power plants
operating on oil or coal:
(i)
Gas fired
(ii)
Oil fired
(iii)
Coal fired |
400
400
-
- |
3000
400
600
1200 |
Explanations
Based on the assumption
that the size of the particulate is
10 micron or more.
Based on I per cent
sulphur content in fuel oil. Higher
content of sulphur will cause standards
to be pro-rated.
In respect of emissions
of sulphur dioxide and nitrogen oxides,
the c) power plants operating on oil
and coal
as fuel shall in addition to National
Environmental Quality Standards (NEQS)
specified above.
Comply
with the following standards:-
A . Sulphur dioxide
Sulphur
dioxide Background levels Micro-gram
per cubic meter ug/m3). Standards
|
Background
Air Quality (So2 Basis) |
Annual
Average |
Max.
24-hours Interval |
Criterion
I Max. So2 Emission (Tons per
day per plant) |
Criterion
II Max. allowable ground level
increment to ambient (ug/m3) |
Unpolluted
Moderately Polluted * |
<
50 |
<
200 |
500
|
50
|
Low
|
50
|
200
|
500
|
50
|
High
|
100
|
400
|
100
|
10
|
Very
polluted * |
>
100 |
>
400 |
100
|
10
|
* For immediate values between 50 and
100 ug/m3 linear Interpolations should
be true
** No projects with sulphur dioxide
emissions will be racommended.*
B. Nitrogen Oxide Ambient
air concentrations of nitrogen oxides,
expressed as NO3 should not be exceeded
the following :-
Annual Arithmetic Mean 100ug/m3
(0.05 ppm)
Emission levels for stationary source
discharges, before mixing with the atmosphere,
should be maintained as follows:
For fuel fired steam generators, as
Nanogram (10-gram) per joule of heat
input:
Liquid fossil fuel ::
130
Solid fossil fuel ::
300
Lignite fossil fuel
:: 260
Note
Dilution of gaseous emissions
to bring them to the NEQS limiting value
t permissible through excess air mixing,
blowing before emitting he environment
|
