EPA · Iowa · discharge permits by parameter
pH in Iowa
- 1,164Permits carrying a limit
- 816With a recorded exceedance
- 58,899Nationwide
Permits
Other parameters in Iowa
- Solids, total suspended1,048
- BOD, carbonaceous [5 day, 20 C]883
- Nitrogen, ammonia total [as N]863
- E. coli645
- BOD, 5-day, 20 deg. C509
- Depth of pond or reservoir in feet413
- Oxygen, dissolved [DO]378
- Nitrogen, total [as N]238
- Nitrogen, Kjeldahl, total [as N]211
- Chloride [as Cl]208
- Chlorine, total residual206
- Phosphorus, total [as P]191
- Toxicity [acute], Ceriodaphnia dubia129
- Toxicity [acute], Pimephales promelas [Fathead Minnow]129
- Iron, total [as Fe]107
- Oil & Grease100
- Copper, total [as Cu]89
- Nitrogen, nitrate total [as N]80
- Sulfate, total [as SO4]52
- Solids, settleable47
- Temperature, water deg. fahrenheit47
- Zinc, total [as Zn]35
- Cyanide, total [as CN]30
- Flow, in conduit or thru treatment plant27
- Annual Nitrate Nitrogen Discharged26
- Cadmium, total [as Cd]24
- Sludge settleability 30 minute23
- Mixed liquor23
- Aluminum, total [as Al]22
- Chromium, total [as Cr]22
- Lead, total [as Pb]21
- Nitrogen, total Kjeldahl20
- Silver, total [as Ag]19
- Oxygen demand, chem. [high level] [COD]17
- Benzene16
- Coliform, fecal general16
- Benzene, toluene, xylene in combination15
- Nickel, total [as Ni]15
- Chromium, hexavalent [as Cr]15
- Chlorination duration14
- Solids, total dissolved13
- Selenium, total [as Se]13
- Report due [yrmoda]12
- Solids, Settleable, Net11
- Temperature, length of excursion7
- Chlorine, free available7
- Toluene6
- Phenols6
- Streamflow6
- Organics, total toxic [TTO]5
- Trichloroethene5
- Di[2-ethylhexyl] phthalate [DEHP]5
- Ethylbenzene5
- Mercury, total [as Hg]5
- Polychlorinated biphenyls [PCBs]5
- Manganese, total [as Mn]5
- Phenol5
- Thallium, total [as Tl]5
- Chloroform5
- 1,2-Dichloroethane5