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Electric Services, major discharger, Marion, Illinois. NPDES permit IL0004316, in force until Jun 30, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Sulfate [as S] | daily maximum | ≤ 1494 mg/L | all year | 002 |
| pH | monthly minimum | ≥ 6.5 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 |
| Chloride [as Cl] | daily maximum | ≤ 500 mg/L | all year | 002 |
| Fluoride, total [as F] | daily maximum | ≤ 1.4 mg/L | all year | 002 |
| Boron, total [as B] | daily maximum | ≤ 9 mg/L | all year | 002 |
| Copper, total [as Cu] | 30-day average | ≤ .023 mg/L | all year | 002 |
| Copper, total [as Cu] | daily maximum | ≤ .037 mg/L | all year | 002 |
| Iron, total [as Fe] | 30-day average | ≤ 2 mg/L | all year | 002 |
| Iron, total [as Fe] | daily maximum | ≤ 4 mg/L | all year | 002 |
| Nickel, total [as Ni] | 30-day average | ≤ .087 mg/L | all year | 002 |
| Zinc, total [as Zn] | 30-day average | ≤ .0553 mg/L | all year | 002 |
| Zinc, total [as Zn] | daily maximum | ≤ .2133 mg/L | all year | 002 |
| Oil and grease | 30-day average | ≤ 15 mg/L | all year | 002 |
| Oil and grease | daily maximum | ≤ 20 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 |
| Mercury, total [as Hg] | annual average | ≤ 12 ng/L | all year | 002 |
| Temperature, water deg. fahrenheit | monthly maximum | ≤ 73 deg F | Jan, Feb, Mar, Dec | 003 |
| Temperature, water deg. fahrenheit | monthly maximum | ≤ 93 deg F | Apr, May | 003 |
| Temperature, water deg. fahrenheit | monthly maximum | ≤ 103 deg F | Jun–Sep | 003 |
| Temperature, water deg. fahrenheit | monthly maximum | ≤ 94 deg F | Oct, Nov | 003 |
| Temperature, length of excursion | total | ≤ 87.6 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 | weekly maximum | ≤ .2 mg/L | all year | 003 |
| 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 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 006 |
Cited limits by parameter: Illinois's rules and the federal ones.
Same industry: the 45 Electric Services permits in Illinois.
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Your permit document is the final word. As JSON: /api/v1/permits/IL0004316 · MCP: https://passage-data.com/mcp