EPA · Virginia · discharge permits by parameter

Toxicity, final conc toxicity units in Virginia

• 36Permits carrying a limit
• 16With a recorded exceedance
• 219Nationwide

Permits

Other parameters in Virginia

• Solids, total suspended3,271
• pH2,420
• Flow, in conduit or thru treatment plant2,259
• BOD, 5-day, 20 deg. C1,112
• Phosphorus, total [as P]1,004
• Nitrogen, total [as N]973
• Oxygen, dissolved [DO]901
• Chlorine, total residual856
• E. coli657
• Zinc, total recoverable483
• Nitrogen, ammonia total [as N]465
• Nitrogen, Kjeldahl, total [as N]463
• Copper, total recoverable445
• Aluminum, total recoverable379
• Iron, total recoverable373
• Nitrite + Nitrate total [as N]339
• Precipitation volume331
• Lead, total recoverable291
• BOD, carbonaceous [5 day, 20 C]224
• Oil & Grease216
• Cadmium, total recoverable212
• Petrol hydrocarbons, total recoverable206
• Chromium, total recoverable206
• Iron, total [as Fe]204
• Solids, settleable191
• Phosphorus, Total As P189
• Nitrogen, Total As N186
• Manganese, total [as Mn]185
• Solids, total dissolved [TDS]138
• Hardness, total [as CaCO3]113
• Temperature, water deg. centigrade108
• Oxygen demand, chem. [low level] [COD]95
• Zinc, total [as Zn]66
• Coliform, fecal general66
• Naphthalene62
• Arsenic, total recoverable60
• Copper, dissolved [as Cu]59
• Silver total recoverable59
• Zinc, dissolved [as Zn]58
• Phenol58
• Enterococci57
• Selenium, total recoverable56
• .alpha.-Terpineol54
• TU Static Renewal 7-Day Chronic Ceriodaphnia dubia54
• p-Cresol54
• Benzoic acids, total54
• TU Static Renewal 7-Day Chronic Pimphales promelas45
• Toluene44
• Mercury, total recoverable43
• Ethylbenzene43
• Benzene43
• Xylene [mix of m+o+p]38
• Chloride [as Cl]36
• 1,2-Dichloroethane, total weight35
• Carbon, tot organic [TOC]32
• Methyl tert-butyl ether [MTBE]28
• Solids, total dissolved28
• Nickel, total recoverable28
• Trichloroethylene27
• Chloroform27

Toxicity, final conc toxicity units nationwide