Singapore tap water. How does it look?

carpetlover

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Singapore Drinking Water Quality (July 2019 - June 2020)
Source : PUB’s Water Quality Department
Parameters
Unit
WHO Guideline ValueNote (1)
Environmental Public Health (Water Suitable for Drinking) (No.2) Regulations 2019
Average
Range
Compliance
Microbiological Parameter
Escherichia coli (E. coli)
cfu/100mL
<1
<1
<1
<1
P
Physical Parameters
Colour
Hazen
-
15
<5
<5
P
Conductivity
μS/cm
-
-
242
77-416
-
Odour
TON
-
-
Unobjectionable
Unobjectionable
-
pH Value
Units
-
6.5-9.5
8.1
7.8-8.3
P
Total Dissolved Solid
mg/L
-
-
145
89-257
-
Turbidity
NTU
5
5
0.14
<0.05-0.51
P
Radiological Parameters
Gross Alpha
Bq/L
0.5Note (2)
0.5
0.030
<0.017-0.076
P
Gross Beta
Bq/L
1Note (2)
1
0.146
<0.021-0.310
P
Radon 222
Bq/L
-
100
<0.6
<0.6-0.61
P
Chemical Parameters
Acrylamide
μg/L
0.5
0.5
<0.2
<0.2
P
Alachlor
μg/L
20
20
<1
<1
P
Aldicarb Sulfoxide and Aldicarb Sulfone
μg/L
10
10
<0.05
<0.05
P
Aldrin and Dieldrin
μg/L
0.03
0.03
<0.02
<0.02
P
Antimony
μg/L
20
20
<1
<1-1
P
Arsenic
μg/L
10
10
<0.5
<0.5 - 0.70
P
Atrazine and its chloro-s-triazine metabolites
μg/L
100
100
<2.2
<2.2
P
Aluminium
mg/L
-
0.1, 0.2 Note (3)
0.023
<0.019 - 0.059
P
Barium
mg/L
1.3
1.3
0.023
<0.004 - 0.050
P
Bentazone
μg/L - 500 <0.05 <0.05 P
Benzene
μg/L 10 10 <1 <1 P

Parameters
Unit
WHO Guideline ValueNote (1)
Environmental Public Health (Water Suitable for Drinking) (No.2) Regulations 2019
Average
Range
Compliance
Benzo[a]pyrene μg/L
<0.07 <0.07 P 0.023 0.007 -0.062 P <0.002 <0.002-0.006 P 9 <5 -21 P <5 <5 - 5.52 P <0.2 <0.2-0.22 P 23 9 - 58 - <0.05 <0.05 P <0.4 <0.4 P 0.21 <0.043 - 0.607 P 0.2 <0.02 <0.02 P 5 2.40 1.95 - 2.84 P 0.7 <0.015 <0.015 P 300 17 <5-67 P 30 30 <0.05 <0.05 P
<0.1 <0.005 <0.002
Boron
Bromate
Bromodichloromethane
Bromoform
Cadmium
Calcium
Carbofuran
Carbon Tetrachloride
Chlorate
Chlordane (total isomers)
Chlorine
Chlorite
Chloroform
Chlorotoluron
Chlorpyrifos
Chromium
Copper
Cyanazine μg/L
Cyanide mg/L - 0.07
Cyanogen chloride (as cyanide) μg/L Chloride mg/L
-70
2,4-D (2,4-dichlorophenoxyacetic acid) in free acid form
2,4-DB [4-(2,4-Dichlorophenoxy) butyric acid] DDT and metabolites
Di(2-Ethylhexyl) phthalate 1,2-Dibromo-3-Chloropropane (DBCP) Dibromoacetonitrile
Dibromochloromethane
Dibromoethane (Ethylene Dibromide) 1,2- Dichloroacetate
Dichloroacetonitrile
Dichlorobenzene, 1,2-
μg/L μg/L μg/L μg/L μg/L μg/L μg/L μg/L μg/L μg/L μg/L
-- 30 30 90 90 11 88 11 70 70 100 100 0.4 0.4 50 50 20 20 1000 1000
mg/L mg/L μg/L μg/L μg/L mg/L μg/L μg/L mg/L μg/L mg/L mg/L μg/L μg/L μg/L mg/L mg/L
<0.1 P <0.005 P <0.002-0.003 P 0.6 0.6 <0.2 <0.2 P <0.03 <0.03 P <50 <50 P 33 <5 - 103 - <0.05 <0.05 P <0.05 <0.05 P <0.01 <0.01 P <1 <1 P <0.1 <0.1 P <7 <7 P 6 <5 - 16 P <0.05 <0.05 P 11 <5 - 33 P <1 <1 - 3.2 P <1 <1 P
0.7 2.4 0.01 60 100 3
- 7 4 0.7 0.2 5 0.7 300
0.7 2.4 0.01 60 100 3
- 7 4 0.7
30 30 0.05 0.05 2 2
Dichlorobenzene, 1,4-
μg/L
300
300
<1
<1
P
Dichloroethane, 1,2-
Dichloroethene (cis & trans), 1,2- Dichloromethane
Dichloropropane, 1,2- Dichloropropene, 1,3- Dichlorvos
μg/L 30 μg/L 50 μg/L 20 μg/L 40 μg/L 20 μg/L -
30 <2 50 <5 20 <3 40 <1 20 <2 20 Note (4)
<2 P <5 P <3 P <1 P <2 P
Note (4) -

Parameters
Unit
WHO Guideline ValueNote (1)
Environmental Public Health (Water Suitable for Drinking) (No.2) Regulations 2019
Average
Range
Compliance
Dicofol μg/L
Dichlorprop μg/L
Dimethoate μg/L
Dioxane, 1,4 μg/L
Diquat μg/L
Endrin μg/L
Epichlorohydrin μg/L
Ethylbenzene μg/L
Note (4) - <0.05 P <0.1 P <1 P <2.5 P <0.01 P <0.1 P <1 P 600 600 <1 <1 P
Edetic acid (EDTA-Ethylene Diamine Tetraacetic Acid) in free acid form
Fenoprop (2,4,5-TP; 2,4,5-trichlorophenoxy propionic acid)
μg/L
μg/L Fluoride mg/L
1.5 0.7 - 900 0.6 0.6 200 200
9 9 - - 10 10 2 2
- 900
- 700 10 10 6 6 20 20 10 10
1 1 6 6 3 3 20 20
- 0.4 - -
- 0.07
0.07 0.07
0.45 Note (4) <0.01 <0.5 <0.05 0.005 <0.5 <0.01 <0.02 <0.05 <0.05 <0.03 <0.01 <1 <0.1 <0.6 2.34 <10 0.004 1.67 <0.004 <0.003 0.29
<0.05 P 0.38-0.59 P Note (4) - <0.01 P <0.5 P <0.05 P <0.003 - 0.024 - <0.5 P <0.01 P <0.02 P <0.05 P <0.05 P <0.03 P <0.01 P <1 P <0.1 P <0.6 P 1.85-2.73 P <10 P <0.002 - 0.027 P
0.69-3.15
<0.004 P <0.003 P
0.01 - 1.11 P
Glyphosate and Aminomethylphosphonic acid (AMPA)
μg/L
Hexachlorobutadiene μg/L
Hydroyatrazine μg/L
Isoproturon μg/L
Iron mg/L
Lead μg/L
Lindane μg/L
Malathion μg/L
MCPA (4-Chloro-2-methylphenoxyacetic acid) μg/L
Mecoprop (MCPP; [2(2-methyl-chlorophenoxy) propionicacid])
μg/L Mercury, in inorganic form μg/L Methoxychlor μg/L Metolachlor μg/L Microcystin-LR μg/L Molinate μg/L Monochloramine mg/L Monochloroacetic acid (chloroacetic acid) μg/L Manganese mg/L Magnesium mg/L Molybdenum mg/L Nickel mg/L
Nitrate (as N) mg/L 11
11
- 10 Note (4) 100 100 <0.05
<0.1 <1 <2.5
9 9 <0.05
6 6 50 50 - 30
0.6 0.6 <0.01 0.4 0.4 <0.1 300 300 <1
Nitrilotriacetic acid (NTA)
μg/L
200
200
<1
<1
P
Nitrite (as N)
Nitrate plus nitrite combined
Nitrosodimethylamine (NDMA)
Pendimethalin μg/L Pentachlorophenol μg/L Perchlorate μg/L
<0.01 - 0.01 P 0.001 - 0.101 P <2 P 20 20 <1 <1 P 9 9 <0.5 <0.5 P 70 70 <2 <2 P
mg/L 0.9 0.9 units 1 1 ng/L 100 100
<0.01 0.026 <2

Parameters
Unit
WHO Guideline ValueNote (1)
Environmental Public Health (Water Suitable for Drinking) (No.2) Regulations 2019
Average
Range
Compliance
Permethrin, where used as a larvicide for public health purposes
μg/L
-
300
<2
<2
P
Pyriproxyfen
μg/L
-
300
<0.05
<0.05
P
Selenium
μg/L
40
40
<0.5
<0.5
P
Simazine
μg/L
2
2
<0.2
<0.2
P
Sodium dichloroisocyanurate
μg/L 50 (40 as cyanuric 50 (40 as cyanuric acid) acid)
<5
<5
P
Styrene
μg/L
20
20
<2
<2
P
Sulphate
mg/L
-
-
33
4-145
-
Silica (as SiO2)
mg/L
-
-
3.45
0.46-7.70
-
Sodium mg/L
-
-
6.06
2.2-26.0
Terbuthylazine (TBA)
μg/L
7
7
<0.7
<0.7
P
Tetrachloroethene
μg/L
40
40
<1
<1
P
Toluene
μg/L
700
700
<5
<5
P
Trichloroethene
μg/L
20
20
<1
<1
P
Trichlorophenol 2,4,6-
μg/L
200
200
<1
<1
P
2,4,5-T (2,4,5-Trichlorophenoxyacetic acid)
μg/L
9
9
<0.05
<0.05
P
Trichloroacetate
μg/L
200
200
8.7
<5 - 26
P
Trifluralin
μg/L
20
20
<1
<1
P
Total Trihalomethanes Ratio
units
<1
<1
0.27
<0.2 - 0.57
P
Total Organic Carbon (TOC)
mg/L
-
-
1.1
<0.1 - 2.5
-
Total Alkalinity (as CaCO3)
mg/L
-
-
23
8 - 46
-
Total Hardness (as CaCO3)
mg/L
-
-
64
27 - 150
-
Total Phosphorous (as P)
mg/L
-
-
0.019
<0.003 – 0.059
-
Uranium
μg/L
30
30
0.008
0.001 - 0.014
P
Vinyl Chloride
μg/L
0.3
0.3
<0.1
<0.1
P
Xylenes
μg/L
500
500
<15
<15
P
The quality of drinking water is regulated by the Environmental Public Health (Water Suitable for Drinking) (No.2) Regulations 2019.
The drinking water standards set out under the Environmental Public Health (EPH) Regulations were based on the World Health Organisation (WHO) Guidelines for Drinking-water Quality. The table above provides the data of drinking water quality produced by the waterworks.
Note (1) WHO Guideline Values listed in this report are obtained from WHO Guidelines for Drinking-water Quality 2017, 4th edition incorporating 1st addendum. Note (2) These are WHO screening values and not guideline values.
Note (3) Code of Practice on Drinking Water Sampling and Safety Plans :-
Aluminium controlled at 0.1mg/L or less in large water treatment facilities that serve 10,000 or more people (Applicable to all Singapore and Johor Waterworks except Pulau Tekong Waterworks).
Aluminium controlled at 0.2mg/L or less in small facilities that serve less than 10,000 people (Applicable only to Pulau Tekong Waterworks).
Note (4) Data for Dichlorvos, Dicofol, Glyphosate and Aminomethylphosphonic (AMPA) will be made available in the Jan 2020 - Dec 2020 Singapore Drinking Water Quality Report.
 

ZoWhat

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