EPA · Iowa · discharge permits by parameter

Nitrogen, nitrate total [as N] in Iowa

• 80Permits carrying a limit
• 10With a recorded exceedance
• 1,650Nationwide

Permits

Other parameters in Iowa

• pH1,164
• 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
• 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

Nitrogen, nitrate total [as N] nationwide