EPA · Oregon · discharge permits by parameter

Flow, in conduit or thru treatment plant in Oregon

• 213Permits carrying a limit
• 13With a recorded exceedance
• 40,755Nationwide

Permits

Other parameters in Oregon

• pH358
• Solids, total suspended339
• BOD, 5-day, 20 deg. C214
• 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
• Salinity [PSU]6

Flow, in conduit or thru treatment plant nationwide