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Industrial Inorganic Chemicals, major discharger, Metropolis, Illinois. NPDES permit IL0004421 expired Jun 30, 2020; its limits still apply. Last 12 months: over a limit once (last October 2025), 1 of 52 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Coliform, fecal general, daily maximum | 26000 #/100mL | ≤ 400 #/100mL | 6400% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | monthly maximum | report only (deg F) | all year | 002 |
| pH | monthly minimum | ≥ 6 SU | all year | 002 |
| pH | monthly maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | 30-day average | ≤ 15 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | 30-day average | ≤ 227.4 lb/d | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 454.9 lb/d | all year | 002 |
| Oil & Grease | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | Jun, Dec | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Jun, Dec | 002 |
| Cyanide, weak acid, dissociable | daily maximum | report only (ug/L) | all year | 002 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | 002 |
| Fluoride, total [as F] | 30-day average | ≤ 15 mg/L | all year | 002 |
| Fluoride, total [as F] | daily maximum | ≤ 30 mg/L | all year | 002 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 002 |
| Fluoride, total [as F] | 30-day average | ≤ 227.4 lb/d | all year | 002 |
| Fluoride, total [as F] | daily maximum | ≤ 454.9 lb/d | all year | 002 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | 002 |
| Barium, total [as Ba] | daily maximum | report only (mg/L) | all year | 002 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 002 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | all year | 002 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 002 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 002 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 002 |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | 002 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 002 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year | 002 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 002 |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | 002 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 002 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 002 |
| Uranium, total as U3O8 | daily minimum | report only (mg/L) | all year | 002 |
| Uranium, total as U3O8 | monthly average | report only (mg/L) | all year | 002 |
| Uranium, total as U3O8 | daily maximum | report only (mg/L) | all year | 002 |
| Uranium, total as U3O8 | average | report only (lb/mo) | all year | 002 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ .05 mg/L | all year | 002 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | A02 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 60 mg/L | all year | A02 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 16.4 lb/d | all year | A02 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 32.8 lb/d | all year | A02 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | A02 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | A02 |
| Solids, total suspended | monthly average | ≤ 16.4 lb/d | all year | A02 |
| Solids, total suspended | weekly average | ≤ 24.6 lb/d | all year | A02 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | A02 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | A02 |
| E. coli | geometric mean | ≤ 130 #/100mL | Apr–Oct | A02 |
| E. coli | daily maximum | report only (#/100mL) | Apr–Oct | A02 |
| E. coli exceedances | maximum | ≤ 25 % | Apr–Oct | A02 |
| Coliform, fecal general | daily maximum | ≤ 400 #/100mL | all year | A02 |
| Solids, total suspended | 30-day average | ≤ 15 mg/L | all year | B02 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | B02 |
| Fluoride, total [as F] | 30-day average | ≤ 15 mg/L | all year | B02 |
| Fluoride, total [as F] | daily maximum | ≤ 30 mg/L | all year | B02 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | B02 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | B02 |
| Solids, total suspended | 30-day average | ≤ 15 mg/L | all year | C02 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | C02 |
| Fluoride, total [as F] | 30-day average | ≤ 15 mg/L | all year | C02 |
| Fluoride, total [as F] | daily maximum | ≤ 30 mg/L | all year | C02 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | C02 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | C02 |
Cited limits by parameter: Illinois's rules and the federal ones.
Same industry: the 58 Chemicals and Allied Products permits in Illinois.
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