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Peru Starved Rock Hydroelectric Plant, City of

Electric Services, North Utica, Illinois. NPDES permit IL0078051, in force until Jul 31, 2030. Last 12 months: over a limit 5 times (last May 2026), 4 required values missing, 6 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form 0 monthly (5 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 4 required values missing, 4 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
March 2026Solids, total suspended, 30-day average76 mg/L≤ 15 mg/L407%
March 2026Solids, total suspended, daily maximum76 mg/L≤ 30 mg/L153%
April 2026Solids, total suspended, 30-day average32 mg/L≤ 15 mg/L113%
April 2026Solids, total suspended, daily maximum32 mg/L≤ 30 mg/L7%
May 2026Solids, total suspended, 30-day average26 mg/L≤ 15 mg/L73%

Limits in force (6)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitmonthly maximum≤ 63 deg FJan, Feb, Mar, Dec
Temperature, water deg. fahrenheitmonthly maximum≤ 93 deg FApr–Nov
Solids, total suspended30-day average≤ 15 mg/Lall year
Solids, total suspendeddaily maximum≤ 30 mg/Lall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year

How strict are these limits?

Cited limits by parameter: Illinois's rules and the federal ones.

Same industry: the 45 Electric Services permits in Illinois.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IL0078051 · MCP: https://passage-data.com/mcp