Environmental Engineering Reference
In-Depth Information
Unregulated M
onitored Substances
Maximum
Contaminant
Level (MCL)
Capital City's
Range
Capital City's
Average Level
Capital City's
Highest Level
Substance
Likely Source
Unit
Aluminum
Erosion of natural deposits; also from addition of
treatment chemicals at the water treatment plant
0.01-0.08
0.05
0.08
NA
ppm
Diethylphthalate
Personal care products and plastics
ND-2.1
ND
2.1
NA
ppm
Manganese
Natural in the environment
ND-0.02
ND
0.02
NA
ppm
Nickel
Corrosion of plumbing materials
ND-2
ND
2
NA
ppb
Sodium
Natural in the environment; also from addition
of treatment chemicals at water treatment plant
9.24
15
24
NA*
ppm
Sulfate
Natural in the environment
23-31
27
31
NA
ppm
*For physician-prescribed “no-salt” diets, a limit of 20 ppm is suggested.
Additional Information
The substances listed below are not regulated by the USEPA; however, the Water Quality Lab
receives calls about them and provides this information as a service to our customers.
Capital City's
Range
Capital City's
Average Level
USEPA's
Suggested Limit
Substance
Unit
Alkalinity
13-39
26
NA
ppm
Chloride
10-47
18
250
ppm
Hardness
31-63
46
NA
ppm
pH (acidity)
6.7-9.5
7.7
6.5-8.5
pH units
Silica
6-9
6
NA
ppm
Total dissolved solids
100-133
114
500
ppm
