Civil Engineering Reference
In-Depth Information
TABLE 1-2. Summary of Mandatory 1962 U.S. Public Health Service Drinking
Water Standards
Range of
Concentrations Found in
CWSS Survey*
(mg / L except as shown)
Limit
(mg / L except as shown)
Constituent
Arsenic (As)
0.05
0.03-0.10
Barium (Ba)
1.0
0-1.55
Boron (B)
5.0
0-3.28
Cadmium (Cd)
0.01
0.2-3.94
Chromium (hexavalent)
0.05
0-0.079
Coliform organisms
1 / 100 ml
2,000 / 100 ml
Cyanide (CN
2
)
0.10
0-0.008
Fluoride (F
-
)
Varies, †0.8 to 1.7
0.2-4.40
Gross beta activity
1,000
c/L
154
c/L
Lead (Pb)
0.05
0-0.64
Selenium (Sc)
0.01
0-0.07
Silver (Ag)
0.05
0-0.03
* 1969 Community Water Supply Study by USPHS. 2,595 distribution samples.
† Dependent on annual average of maximum daily air temperatures.
TABLE 1-3. Summary of Recommended 1962 U.S. Public Health Service Drinking
Water Standards
Range of
Concentrations Found in
CWSS Survey*
(mg / L except as shown)
Limit
(mg / L except as shown)
Constituent
Alkyl benzene sulfonate (ABS)
0.5
0-0.41
Arsenic (As)
0.01
0-3.28
Carbon chloroform extract (CCE)
0.200
0.0008-0.56
Chloride (Cl
)
250
1.0-1,950
Color
15 units
49 units
Copper (Cu)
1.0
0-8.35
Cyanide (CN
)
0.01
0-0.008
Fluoride (F
)
Varies, 0.8 to 1.7
0.2-4.40
Iron (Fe)
0.3
26.0
Manganese (Mn)
0.05
1.32
Nitrate (NO
3
)
45
0.1-127.0
Phenols
0.001
Radium-226
3 pCi / L
0-135.9 pCi / L
Strontium-90
10 pCi / L
0-1.0 pCi / L
Sulfate (SO
4
)
250
1-770
Zinc (Zn)
5
0-13.0
Total dissolved solids (TDS)
500
2,760
Odor, threshold number
3
Turbidity
Chlorination treatment only
5 NTU
53 NTU
Water treatment plants 1 NTU
* 1969 Community Water Supply Study by USPHS, 2,595 distribution system samples.
