EPA · Oregon · discharge permits by parameter
Chromium, hexavalent [as Cr] in Oregon
- 3Permits carrying a limit
- 0With a recorded exceedance
- 1,004Nationwide
Permits
Other parameters in Oregon
- pH358
- Solids, total suspended339
- BOD, 5-day, 20 deg. C214
- Flow, in conduit or thru treatment plant213
- E. coli198
- Temperature, water deg. centigrade165
- Zinc, total [as Zn]155
- Solids, suspended percent removal154
- Copper, total [as Cu]152
- Lead, total [as Pb]151
- BOD, 5-day, percent removal130
- Nitrogen, ammonia total [as N]125
- Chlorine, total residual124
- Phosphorus, total [as P]112
- Chlorine usage91
- Excess thermal load73
- Nitrogen, Kjeldahl, total [as N]64
- Iron, total [as Fe]61
- Nitrite + Nitrate total [as N]57
- Report due [yrmoda]56
- Oil & Grease55
- Alkalinity, total [as CaCO3]50
- Ultraviolet light dosage48
- Flow rate46
- Oxygen, dissolved [DO]45
- Solids, total dissolved40
- BOD, carbonaceous [5 day, 20 C]39
- Flow, total37
- Temperature, water deg. fahrenheit32
- Aluminum, total [as Al]29
- Coliform, fecal general26
- Nitrite Plus Nitrate Total22
- BOD, carb-5 day, 20 deg C, percent removal21
- Ultraviolet light intensity18
- Enterococci18
- Chemical oxygen demand [COD]17
- Oil and grease visual16
- Coliform, fecal - % samples exceeding limit15
- Turbidity14
- Ultraviolet light transmittance14
- Floating solids, waste or visible foam-visual13
- Mercury, total [as Hg]13
- Enterococci - % samples exceeding limit11
- pH, maximum10
- Hardness, total [as CaCO3]10
- pH, minimum10
- Total production - mass10
- Chromium, total [as Cr]9
- BOD, carbonaceous, percent removal9
- Carbon, tot organic [TOC]8
- pH range excursions, monthly total accum7
- Cyanide, total [as CN]7
- Cadmium, total [as Cd]7
- pH range excursions, > 60 minutes7
- Nickel, total [as Ni]7
- Arsenic, total [as As]7
- Solids, settleable7
- Thermal Discharge7
- Formaldehyde7
- Color [PT-CO units]6