EPA · Rhode Island · discharge permits by parameter
Hardness, total [as CaCO3] in Rhode Island
- 40Permits carrying a limit
- 0With a recorded exceedance
- 2,593Nationwide
Permits
Other parameters in Rhode Island
- Solids, total suspended236
- Oil & Grease202
- Lead, total [as Pb]134
- Iron, total [as Fe]125
- Aluminum, total [as Al]114
- Zinc, total [as Zn]111
- Coliform, fecal general90
- Flow, in conduit or thru treatment plant87
- pH68
- Enterococci67
- Nitrogen, total [as N]55
- Phosphorus, total [as P]52
- Copper, total [as Cu]51
- Cadmium, total [as Cd]35
- Chlorine, total residual31
- BOD, 5-day, 20 deg. C31
- Nitrogen, ammonia total [as N]26
- Nitrogen, nitrate total [as N]24
- Nitrogen, nitrite total [as N]24
- Nitrogen, Kjeldahl, total [as N]24
- Solids, settleable23
- Chemical Oxygen Demand [COD]23
- Solids, suspended percent removal21
- BOD, 5-day, percent removal18
- Cyanide, total [as CN]17
- Nitrite + Nitrate total [as N]17
- Temperature, water deg. fahrenheit17
- Nickel, total [as Ni]16
- Phenanthrene14
- Fluorene13
- Naphthalene13
- Fluoranthene12
- Pyrene12
- Acenaphthene12
- Iron, total recoverable11
- pH change [range]11
- Anthracene11
- Indeno[1,2,3-cd]pyrene11
- Benzo[a]anthracene11
- Benzo[b]fluoranthene11
- Benzo[a]pyrene10
- Acenaphthylene10
- Chrysene10
- Benzo[ghi]perylene10
- Turbidity10
- Chromium, total [as Cr]10
- Benzo[k]fluoranthene10
- Dibenz[a,h]anthracene9
- Cyanide, free available9
- LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia8
- Zinc, total recoverable8
- PCB-10167
- LC50 Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)7
- Benzene7
- PCB-12217
- Nickel, total recoverable7
- NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia7
- Ethylbenzene7
- Toluene7
- PCB-12607