9VAC25-280-70: Ground water criteria

CONSTITUENT (mg/l)

GROUND WATER CRITERIA BY PHYSIOGRAPHIC PROVINCE***

Coastal Plain

Piedmont & Blue Ridge

Valley & Ridge

Cumberland Plateau

Alkalinity

30-500

10-200

30-500

30‑200

Total Diss. Solids

1000

250

500

500

Chloride

50*

25

25

25

Sulfate

50

25

100

150

Total Organic Carbon

10

10

10

10

Color units

15

15

15

15

Iron

0.3

0.3

0.3

0.01-10

Manganese

0.05

0.05

0.05

0.01-0.5

Sodium

100*

25

25

100

Fluoride

1.4**

1.4

1.4

1.4

Hardness

120

120

300

180

*It is recognized that naturally occurring concentrations will exceed this limit in the eastern part of the Coastal Plain, especially toward the shoreline and with increased depth.

**Except within the cretaceous aquifer: concentration up to 5 mg/l and higher.

***See Figure 1 for delineation of physiographic provinces.

Figure 1