Environmental Engineering Reference
In-Depth Information
TAble 3.5
Capital City's Annual Level of Contaminants Found in Local Drinking Water (2011)
Regulated Substances
Maximum
Contaminate
Level Goal
(MCLG)
Capital City's
Measured
Range
Maximum
Contaminate
Level (MCL)
Meets
USEPA
Standards
Likely
Source
Capital City's
Average Level
Capital City's
Highest Level
Substance
Unit
Barium
Erosion of
natural
deposits
27-40
33
40
2000
2000
ppb
Ye s
Chloramine
Drinking
water
disinfectant
0.4-5.2
3.3
5.2
4
1a
4
1b
ppm
Ye s
Fluoride
Added to
prevent
tooth decay
0.1-1.2
0.8
1.0
2
4
4
ppm
Ye s
Gross beta activity
Erosion of
natural
deposits
3.3-3.8
3.6
3.8
50
3
0
pCi/L
Ye s
Haloacetic acid
Disinfection
byproducts
19-62
41
42
4
60
NA
ppb
Ye s
Nitrate as nitrogen
Disinfection
byproducts,
runoff
0.12-0.45
0.26
0.45
10
10
ppm
Ye s
Radium 226/228
Erosion of
natural
deposits
ND-08
ND
0.8
5
0
pCi/L
Ye s
(continued)
