(AMENDMENT NO.1 JANUARY 1993)
TO
INDIAN STANDARDS: DRINKING WATER – SPECIFICATIONS (FIRST REVISION)
IS 10500 : 1991
S.No.
Substance or
Characteristic
1
2
Essential characteristics:
1.
Colour, Hazen
units, Max.
Require
ment
(Desira
ble
Limit)
3
Undesirable effect –
outside the desirable
limit
4
Permissible
limit in the
absence of
alternate
source
5
Methods
of test
(Ref. to
IS)
Remarks
6
7
Extended to 25
only if toxic
substances are not
suspected in the
absence of
alternate source
a. Test cold and
when heated.
b. Test at several
dilutions.
Test to be
conducted only
after safety has
been established.
--
5
Above 5 consumer
acceptance decreases
25
3025 (Part
4) 1983
2.
Odour
Unobjec
tionable
--
--
3025 (Part
5) 1983
3.
Taste
Agreeab
le
--
--
3025 (Part
7 & 8)
1984
4.
Turbidity, NTU,
Max.
PH value
5
10
3025 (Part
10) 1984
3025 (Part
11) 1984
6.
Total Hardness (as
CaCO3) mg/L,
Max.
300
7.
Iron as Fe, mg/L,
Max.
0.3
8.
Chlorides as Cl-,
mg/L, Max.
250
Above 5 consumer
acceptance decreases
Beyond this range the
water will affect the
mucous membrane
and / or water supply
system
Encrustation in water
supply structure and
adverse effects on
domestic use.
Beyond this limit
taste / appearance are
affected, has adverse
effect on domestic
uses and water supply
structures and
promotes iron
bacteria
Beyond this limit,
taste, corrosion and
palatability are
affected
5.
6.5– 8.5
1
No
relaxation
--
600
3025 (Part
21) 1983
--
1
32 of
3025,
1964
--
1000
3025 (Part
32) 1988
--
S.No.
Substance or
Characteristic
1
9.
2
Residual free
chlorine, mg/L
10.
Fluoride as F-,
mg/L, Max.
Desirable characteristics:
11.
Dissolved solids,
mg/L, Max.
Require
ment
(Desira
ble
Limit)
3
0.2
Undesirable effect –
outside the desirable
limit
4
--
Permissible
limit in the
absence of
alternate
source
5
--
Methods
of test
(Ref. to
IS)
6
3025 (Part
26) 1986
Remarks
7
To be applicable
only when water is
chlorinated.
Tested at
consumer end.
When protection
against viral
infection required,
it should be
minimum 0.5mg/L
--
1.0
Fluoride may be kept
as low as possible.
High fluoride may
cause fluorosis.
1.5
23 of 3025
1964
500
Beyond this
palatability decreases
and may cause gastro
intestinal irritation
Encrustation in water
supply structure and
adverse effect on
domestic use
Encrustation in water
supply structure and
adverse effect on
domestic use
Astringent taste,
discolouration and
corrosion of pipes
fitting and utensils
will be caused
beyond this
Beyond this limit
taste / appearance are
affected, has adverse
effect on domestic
uses and water supply
structures and
promotes iron
bacteria
2000
3025 (Part
16) 1984
--
200
3025 (Part
40) 1991
--
100
16, 33, 34
of IS
3025:
1964
36 of
3025:
1964
--
35 of
3025:
1964
--
12.
Calcium as Ca+2,
mg/L, Max.
75
13.
Magnesium as
Mg+2, mg/L, Max.
30
14.
Copper as Cu,
mg/L, Max.
0.05
15.
Manganese as Mn,
mg/L, Max.
0.1
2
1.5
0.3
--
S.No.
Substance or
Characteristic
Require
ment
(Desira
ble
Limit)
3
200
1
16.
2
Sulphate as SO4-2
mg/L, Max.
17.
Nitrate as NO3mg/L, Max.
45
18.
Phenolic
compounds as
C6H5OH, mg/L,
Max.
Mercury as Hg,
mg/L, Max.
0.001
0.001
20.
Cadmium as Cd,
mg/L, Max.
21.
Undesirable effect –
outside the desirable
limit
4
Beyond this causes
gastro intestinal
irritation when
magnesium or
sodium are present
Beyond this
methaemoglobinemia
takes place
Beyond this, it may
cause objectionable
taste and odour
Permissible
limit in the
absence of
alternate
source
5
400 (see
Col.7)
Methods
of test
(Ref. to
IS)
6
3025 (Part
24) 1986
Remarks
7
May be extended
upto 400 provided
Magnesium as
Mg+2 does not
exceed 30
--
100
3025 (Part
34) 1988
0.002
54 of
3025,
1964
--
Beyond this, the
water becomes toxic
No
relaxation
To be tested when
pollution is
suspected
0.01
Beyond this, the
water becomes toxic
No
relaxation
(see note)
Mercury
ion
analyzer
(See note)
Selenium as Se,
mg/L, Max.
0.01
Beyond this, the
water becomes toxic
No
relaxation
22.
Arsenic as As,
mg/L, Max.
0.05
Beyond this, the
water becomes toxic
No
relaxation
28 of
3025:
1964
3025 (Part
37): 1988
23.
Cyanide as CN,
mg/L, Max.
0.05
Beyond this limit, the
water becomes toxic
No
relaxation
3025 (Part
27): 1986
24.
Lead as Pb, mg/L,
Max.
0.05
Beyond this limit, the
water becomes toxic
No
relaxation
(See note)
25.
Zinc as Zn, mg/L,
Max.
5
26.
Anionic detergents
as MBAS, mg/L,
Max.
0.2
Beyond this limit it
15
can cause astringent
taste and an
opalescence in water
Beyond this limit it
1.0
can cause a light froth
in water
27.
Chromium as Cr6+,
mg/L, Max.
0.05
19.
May be carcinogenic
above this limit
3
No
relaxation
39 of
3025:
1964
Methylene
blue
extraction
method
38 of
3025:
1964
To be tested when
pollution is
suspected
To be tested when
pollution is
suspected
To be tested when
pollution is
suspected.
To be tested when
pollution is
suspected.
To be tested when
pollution is
suspected.
To be tested when
pollution is
suspected.
To be tested when
pollution is
suspected.
To be tested when
pollution is
suspected.
S.No.
1
28.
29.
30.
Substance or
Characteristic
2
Polynuclear
aromatic
hydrocarbons as
PAH, mg/L, Max.
Mineral oil, mg/L,
Max.
Require
ment
(Desira
ble
Limit)
3
--
0.01
Pesticides, mg/L,
Max.
Radioactive
materials
a. Alpha emitters
Bq/L, Max.
b. Beta emitters
pci/L, Max.
Alkalinity, mg/L,
Max.
Absent
33.
Aluminium as Al
mg/L, Max.
0.03
34.
Boron as B, mg/L,
Max.
1
31.
32.
Undesirable effect –
outside the desirable
limit
4
May be carcinogenic
Beyond this limit
undesirable taste and
odor after
chlorination take
place
Toxic
Permissible
limit in the
absence of
alternate
source
5
--
Remarks
6
7
--
--
0.03
Gas
chromatog
raphic
method
To be tested when
pollution is
suspected.
0.001
--
--
58 of
3025:
1964
--
13 of
3025:
1964
31 of
3025:
1964
29 of
3025:
1964
--
--
--
0.1
--
--
1
200
Beyond this limit
taste becomes
unpleasant
Cumulative effect is
reported to cause
dementia
--
600
0.2
5
Note: Atomic Absorption Spectrophotometric method may be used.
4
Methods
of test
(Ref. to
IS)
--
--
Water quality criteria for different uses
(specified by CPCB, 1979 and the Bureau of Indian Standards, 1982)
S.
No
1
Water quality
parameter
A*
Dissolved Oxygen (DO) mg/l
(minimum)
Biochemical Oxygen Demand
(BOD), mg/l (max)
2
3
Total Coliform organisms
**
Characteristic of water body
B*
C*
D*
E*
6
5
4
4
3
2
3
3
-
-
500
500
-
-
500
-
1500
-
2100
250
-
10
-
600
300
-
300
-
600
20
400
-
400
-
1000
20
-
-
50
-
1.2
-
-
-
-
1000
2500
6.5-8.5
0.05
0.3
1.5
0.1
6.5-8.5
0.2
1.5
-
6.5-8.5
0.2
1.5
0.1
6.5-8.5
0.5
-
6.0-8.5
-
50
**
MPN/100ml (max)
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Note: *
Total Dissolved Solids (TDS)
mg/l (max)
Chlorides (as Cl-) mg/l (max)
Colour, Hazen units (max)
Sodium Absorption Ratio
(max)
Boron (as B), mg/l (max)
Sulphates (as SO4-2), mg/l
(max)
Nitrates (as NO3-) mg/l (max)
Free Ammonia (as NH3) mg/l
(max)
Conductivity at 25oC micro
mhos/cm (max)
pH value
Arsenic (as As), mg/l (max)
Iron (as Fe), mg/l (max)
Fluoride (as F), mg/l (max)
Lead (as Pb), mg/l (max)
Classes of Water use:
A
B
C
D
E
Drinking water source without conventional treatment but after disinfection
Out door bathing (organised)
Drinking water source with conventional treatment followed by disinfection.
Propagation of wild life, fisheries.
Irrigation, industrial cooling, controlled waste disposal.
**
If the coliform is found to be more than the prescribed tolerance limits, the criteria for
coliforms shall be satisfied if not more than 20 percent of samples show more than the
tolerance limits specified and not more than 5 percent of samples show values more than 4
times the tolerance limits. There should be no visible discharge of domestic and industrial
waste into class “A” waters. In case of classes “B” and “C” the discharge shall be so regulated
/ treated as to ensure maintenance of the stream standards.
5
AMBIENT AIR QUALITY STANDARDS (NATIONAL)
Pollutants
Sulphur
Dioxide (SO2)
Oxides of
Nitrogen as
NO2
Suspended
Particulate
Matter (SPM)
Respirable
Particulate
Matter (RPM)
(size less
than 10
microns)
Lead (Pb)
Ammonia
Carbon
Monoxide
(CO)
*
**
Time
weighted
average
Annual
average*
Concentration in ambient air
Residential
Industrial
Sensitive
Rural &
areas
areas
other areas
80 g/m3
60 g/m3
15 g/m3
Method of
measurement
Improved West and
Geake method
24 hours**
Annual
average*
120 g/m3
80 g/m3
80 g/m3
60 g/m3
30 g/m3
15 g/m3
Ultraviolet fluorescence
Jacob & Hochheiser
Modified (Na-Arsenite)
method
24 hours**
120 g/m3
80 g/m3
30 g/m3
Annual
average*
360 g/m3
140 g/m3
70 g/m3
Gas phase
chemiluminescence
High volume sampling,
(Average flow rate not
less than 1.1 m3/minute)
24 hours**
Annual
average*
24 hours**
500 g/m3
120 g/m3
200 g/m3
60 g/m3
100 g/m3
50 g/m3
150 g/m3
100 g/m3
75 g/m3
Annual
average*
1.0 g/m3
0.75 g/m3
0.5 g/m3
ASS method after
sampling using EPM
24 hours**
1.5 g/m3
1.0 g/m3
0.75 g/m3
2000 or equivalent filter
paper
Annual
average*
24 hours**
8 hours**
0.1 g/m3
0.1 g/m3
0.1 g/m3
0.4 g/m3
5.0 g/m3
0.4 g/m3
2.0 g/m3
0.4 g/m3
1.0 g/m3
1 hour
10.0 g/m3
4.0 g/m3
2.0 g/m3
Respirable particulate
matter sampler
Non Dispersive Infra
RED (NDIR)
Spectroscopy
Annual arithmetic mean of minimum 104 measurements in a year taken twice a week 24 hourly at
uniform interval.
24 hourly/8 hourly values should be met 98% of the time in a year. However, 2% of the time, it may
exceed but not on two consecutive days.
Note:
1. National Ambient Air Quality Standard: The levels of air quality with an adequate margin of safety, to
protect the public health, vegetation and property.
2. Whenever and wherever two consecutive values exceeds the limit specified above for the respective
category, it would be considered adequate reason to institute regular / continuous monitoring and further
investigations.
3. The standards for H2S and CS2 have been notified separately vide GSR No. 7, dated December 22 nd 1998
under Rayon industry – for details please see Sl No. 65 of this document.
6
ANDHRA PRADESH POLLUTION CONTROL BOARD
A3, I.E.Sanathnagar, Hyderabad - 500018
NOISE (AMBIENT STANDARDS)
Area code
A
B
C
D
Limit in dB (A) Leq
Day time
Night time
75
70
65
55
55
45
50
40
Category of area
Industrial area
Commercial area
Residential area
Silence zone
Note:
1. Day time is reckoned in between 6 a.m. and 9 p.m.
2. Night time is reckoned in between 9 p.m. and 6 a.m.
3. Silence zone is defined as areas upto 100 meters around such premises as hospitals, educational
institutions and courts. The silence zones are to be declared by the competent authority
4. Mixed categories of areas should be declared as “one of the four above mentioned categories by
the competent authority and the corresponding standard shall apply
7