9VAC25-280-40: Ground water standards applicable statewide

CONSTITUENT

CONCENTRATION

Sodium

270 mg/l

Foaming Agents as methylene blue active substances

0.05 mg/l

Petroleum hydrocarbons

1 mg/l

Arsenic

0.05 mg/l

Barium

1.0 mg/l

Cadmium

0.0004 mg/l

Chromium

0.05 mg/l

Copper

1.0 mg/l

Cyanide

0.005 mg/l

Lead

0.05 mg/l

Mercury

0.00005 mg/l

Phenols

0.001 mg/l

Selenium

0.01 mg/l

Silver

None

Zinc

0.05 mg/l

Chlorinated Hydrocarbon Insecticides

Aldrin/Dieldrin

0.003 μg/l

Chlordane

0.01 μg/l

DDT

0.001 μg/l

Endrin

0.004 μg/l

Heptachlor

0.001 μg/l

Heptachlor Epoxide

0.001 μg/l

Kepone

None

Lindane

0.01 μg/l

Methoxychlor

0.03 μg/l

Mirex

None

Toxaphene

None

Chlorophenoxy Herbicides

2,4‑D

0.1 mg/l

Silvex

0.01 mg/l

Radioactivity

Total Radium (Ra‑226 & Ra‑228)

5 pCi/1

Radium 226

3 pCi/1

Gross Beta Activity*

50 pCi/1

Gross Alpha Activity (excluding Radon & Uranium)

15 pCi/1

Tritium

20,000 pCi/l

Strontium‑90

8 pCi/l

Manmade Radioactivity ‑ Total Dose Equiv.**

4 mrem/yr

pCi/l = picoCurie per liter

mrem/yr = millirems per year

*The gross beta value shall be used as a screening value only. If exceeded, the water must be analyzed to determine the presence and quantity of radionuclides to determine compliance with the tritium, strontium, and manmade radioactivity standards.

**Combination of all sources should not exceed total dose equivalent of 4 mrem/year.