EPA · Illinois · discharge permits by parameter
Hardness, total [as CaCO3] in Illinois
- 102Permits carrying a limit
- 0With a recorded exceedance
- 2,593Nationwide
Permits
Other parameters in Illinois
- Flow, in conduit or thru treatment plant2,319
- pH2,255
- Solids, total suspended2,146
- Chlorine, total residual1,760
- BOD, 5-day, 20 deg. C1,566
- Coliform, fecal general1,439
- Nitrogen, ammonia total [as N]1,320
- BOD, carbonaceous [5 day, 20 C]1,240
- Oxygen, dissolved [DO]1,233
- Iron, total [as Fe]550
- Phosphorus, total [as P]378
- Oil & Grease361
- Temperature, water deg. fahrenheit351
- Zinc, total [as Zn]349
- Copper, total [as Cu]341
- Manganese, total [as Mn]328
- Lead, total [as Pb]316
- Mercury, total [as Hg]316
- Nickel, total [as Ni]313
- Cadmium, total [as Cd]294
- Arsenic, total [as As]273
- Chromium, hexavalent [as Cr]272
- Fluoride, total [as F]270
- Chromium, total [as Cr]265
- Barium, total [as Ba]263
- Iron, dissolved [as Fe]258
- Phenolics, total recoverable250
- Nitrogen, total [as N]248
- Chloride [as Cl]245
- Silver, total [as Ag]243
- Cyanide, total [as CN]237
- Flow, total220
- Selenium, total [as Se]215
- Sulfate, total [as SO4]150
- Offensive Conditions141
- Alkalinity, total [as CaCO3]115
- Cyanide, weak acid, dissociable110
- Flow110
- Oil and grease101
- Cyanide, free [amenable to chlorination]100
- Boron, total [as B]84
- Benzene73
- Toluene71
- Solids, total dissolved68
- Ethylbenzene64
- Acidity, total [as CaCO3]62
- Solids, settleable62
- Nitrite + Nitrate total [as N]59
- Carbon, tot organic [TOC]55
- Xylene [mix of m+o+p]54
- Overflows54
- Coliform, fecal - % samples exceeding limit53
- Phosphorus, dissolved53
- Antimony, total [as Sb]50
- Benzene, ethylbenzene, toluene, xylene combination47
- Chromium, trivalent [as Cr]46
- Thallium, total [as Tl]46
- Beryllium, total [as Be]44
- Naphthalene42
- Nitrogen, Kjeldahl, total [as N]41