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Electric Services, Chicago, Illinois. NPDES permit IL0075108, in force until Jul 31, 2030. Last 12 months: over a limit once (last July 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| July 2026 | Chlorine, total residual, daily maximum | .06 mg/L | ≤ .05 mg/L | 20% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | monthly maximum | ≤ 63 deg F | Jan, Feb, Mar, Dec | 001 |
| Temperature, water deg. fahrenheit | monthly maximum | ≤ 93 deg F | Apr–Nov | 001 |
| pH | monthly minimum | ≥ 6 SU | all year | 001 |
| pH | monthly maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 15 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 001 |
| Oil and grease | 30-day average | ≤ 15 mg/L | all year | 001 |
| Oil and grease | daily maximum | ≤ 30 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 |
| Chlorine, total residual | daily maximum | ≤ .05 mg/L | all year | 001 |
| Temperature, water deg. fahrenheit | monthly maximum | ≤ 63 deg F | Jan, Feb, Mar, Dec | 002 |
| Temperature, water deg. fahrenheit | monthly maximum | ≤ 93 deg F | Apr–Nov | 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 |
| Oil and grease | 30-day average | ≤ 15 mg/L | all year | 002 |
| Oil and grease | daily maximum | ≤ 30 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 |
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/IL0075108 · MCP: https://passage-data.com/mcp