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Blast Furnaces And Steel Mills, major discharger, Riverdale, Illinois. NPDES permit IL0002119, in force until Sep 30, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | 001 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | 001 |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | 001 |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | 001 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 001 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 001 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 001 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 001 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 001 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 001 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | 001 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | 001 |
| Barium, total [as Ba] | daily maximum | report only (mg/L) | all year | 001 |
| Barium, total [as Ba] | daily maximum | report only (mg/L) | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 001 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | all year | 001 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | all year | 001 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 001 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ .036 mg/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 001 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 001 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 001 |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | 001 |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 001 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year | 001 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year | 001 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 001 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 001 |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | 001 |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | ≤ .229 mg/L | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 001 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 001 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 001 |
| Oil and grease | daily maximum | report only (mg/L) | all year | 001 |
| Oil and grease | daily maximum | report only (mg/L) | all year | 001 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | 001 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 001 |
| 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 |
| 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 |
| Temperature, water deg. fahrenheit | monthly maximum | ≤ 63 deg F | Jan, Feb, Mar, Dec | 003 |
| Temperature, water deg. fahrenheit | monthly maximum | ≤ 93 deg F | Apr–Nov | 003 |
| pH | monthly minimum | ≥ 6 SU | all year | 003 |
| pH | monthly maximum | ≤ 9 SU | all year | 003 |
| Temperature, length of excursion | annual total | ≤ 97 hr/12mo | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Chlorine, total residual | daily maximum | ≤ .05 mg/L | all year | 003 |
| Temperature Increase Deg. F | monthly maximum | ≤ 5 deg F | all year | 003 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | 004 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | 004 |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | 004 |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | 004 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 004 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 004 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 004 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 004 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 004 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 004 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | 004 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | 004 |
| Barium, total [as Ba] | daily maximum | report only (mg/L) | all year | 004 |
| Barium, total [as Ba] | daily maximum | report only (mg/L) | all year | 004 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 004 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 004 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | all year | 004 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | all year | 004 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 004 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 004 |
| Copper, total [as Cu] | daily maximum | ≤ .036 mg/L | all year | 004 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 004 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 004 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 004 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 004 |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | 004 |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | 004 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 004 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 004 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year | 004 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year | 004 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 004 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 004 |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | 004 |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | 004 |
| Zinc, total [as Zn] | daily maximum | ≤ .229 mg/L | all year | 004 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 004 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 004 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 004 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 004 |
| Oil and grease | daily maximum | report only (mg/L) | all year | 004 |
| Oil and grease | daily maximum | report only (mg/L) | all year | 004 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | 004 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 004 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 004 |
| Temperature, water deg. fahrenheit | monthly maximum | ≤ 63 deg F | Jan, Feb, Mar, Dec | 014 |
| Temperature, water deg. fahrenheit | monthly maximum | ≤ 93 deg F | Apr–Nov | 014 |
| pH | monthly minimum | ≥ 6 SU | all year | 014 |
| pH | monthly maximum | ≤ 9 SU | all year | 014 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | 014 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | 014 |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | 014 |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | 014 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 014 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 014 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 014 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 014 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 014 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 014 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | 014 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | 014 |
| Barium, total [as Ba] | daily maximum | report only (mg/L) | all year | 014 |
| Barium, total [as Ba] | daily maximum | report only (mg/L) | all year | 014 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 014 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 014 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | all year | 014 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | all year | 014 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 014 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 014 |
| Copper, total [as Cu] | daily maximum | ≤ .036 mg/L | all year | 014 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 014 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 014 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 014 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 014 |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | 014 |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | 014 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 014 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 014 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year | 014 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year | 014 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 014 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 014 |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | 014 |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | 014 |
| Zinc, total [as Zn] | daily maximum | ≤ .229 mg/L | all year | 014 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 014 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 014 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 014 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 014 |
| Oil and grease | daily maximum | report only (mg/L) | all year | 014 |
| Oil and grease | daily maximum | report only (mg/L) | all year | 014 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | 014 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | 014 |
| Temperature, length of excursion | annual total | ≤ 87 hr/12mo | all year | 014 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 014 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 014 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 014 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 014 |
| Chlorine, total residual | daily maximum | ≤ .05 mg/L | all year | 014 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 014 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 014 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | 015 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | 015 |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | 015 |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | 015 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 015 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 015 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 015 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 015 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 015 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 015 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | 015 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | 015 |
| Barium, total [as Ba] | daily maximum | report only (mg/L) | all year | 015 |
| Barium, total [as Ba] | daily maximum | report only (mg/L) | all year | 015 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 015 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 015 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | all year | 015 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | all year | 015 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 015 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 015 |
| Copper, total [as Cu] | daily maximum | ≤ .036 mg/L | all year | 015 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 015 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 015 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 015 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 015 |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | 015 |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | 015 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 015 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 015 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year | 015 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year | 015 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 015 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 015 |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | 015 |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | 015 |
| Zinc, total [as Zn] | daily maximum | ≤ .229 mg/L | all year | 015 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 015 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 015 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 015 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 015 |
| Oil and grease | daily maximum | report only (mg/L) | all year | 015 |
| Oil and grease | daily maximum | report only (mg/L) | all year | 015 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | 015 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | 015 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 015 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 015 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 015 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 015 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | 016 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | 016 |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | 016 |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | 016 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 016 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 016 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 016 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 016 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 016 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 016 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | 016 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | 016 |
| Barium, total [as Ba] | daily maximum | report only (mg/L) | all year | 016 |
| Barium, total [as Ba] | daily maximum | report only (mg/L) | all year | 016 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 016 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 016 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | all year | 016 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | all year | 016 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 016 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 016 |
| Copper, total [as Cu] | daily maximum | ≤ .036 mg/L | all year | 016 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 016 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 016 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 016 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 016 |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | 016 |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | 016 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 016 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 016 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year | 016 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year | 016 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 016 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 016 |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | 016 |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | 016 |
| Zinc, total [as Zn] | daily maximum | ≤ .229 mg/L | all year | 016 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 016 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 016 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 016 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 016 |
| Oil and grease | daily maximum | report only (mg/L) | all year | 016 |
| Oil and grease | daily maximum | report only (mg/L) | all year | 016 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | 016 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | 016 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 016 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 016 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 016 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 016 |
Cited limits by parameter: Illinois's rules and the federal ones.
Same industry: the 22 Primary Metal Industries permits in Illinois.
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Your permit document is the final word. As JSON: /api/v1/permits/IL0002119 · MCP: https://passage-data.com/mcp