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WPL - Riverside Energy Center

Electric Services, Beloit, Wisconsin. NPDES permit WI0061921 expired Dec 31, 2023; its limits still apply. Last 12 months: over a limit once (last March 2026), 231 required values missing, 10 of 50 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (9 values), outfall 001 form Q quarterly (4 values), outfall 101 form A monthly (9 values), outfall 102 form A monthly (10 values), outfall 701 form A monthly (2 values), outfall 701 form Q quarterly (1 value)
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 228 required values missing, 22 of 56 reports late

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

Period endingParameterReportedLimitOver by
March 2026Phosphorus, total [as P], rolling average12.5792≤ 1 mg/L1158%

Limits in force (35)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Phosphorus, total [as P]rolling average≤ 1 mg/Lall year001
Phosphorus, total [as P]monthly averagereport only (lb/d)all year001
Zinc, total recoverablemonthly average≤ 650 ug/Lall year001
Zinc, total recoverabledaily maximum≤ 650 ug/Lall year001
Zinc, total recoverabledaily maximum≤ 12.5 lb/dall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualmonthly average≤ 38 ug/Lall year001
Chlorine, total residualdaily maximum≤ 38 ug/Lall year001
Mercury, total recoverablequarterly maximumreport only (ng/L)all year001
pHdaily minimum≥ 4 SUall year101
pHdaily maximum≤ 11 SUall year101
Solids, total suspendedmonthly average≤ 30 mg/Lall year101
Solids, total suspendeddaily maximum≤ 100 mg/Lall year101
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall year101
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/Lall year101
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year101
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year101
pH range excursions, > 60 minutesdaily maximum≤ 0 occur/dall year101
pHdaily minimum≥ 4 SUall year102
pHdaily maximum≤ 11 SUall year102
Zinc, total recoverablemonthly average≤ 1 mg/Lall year102
Zinc, total recoverabledaily maximum≤ 1 mg/Lall year102
Chromium, total recoverablemonthly average≤ .2 mg/Lall year102
Chromium, total recoverabledaily maximum≤ .2 mg/Lall year102
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year102
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year102
pH range excursions, > 60 minutesdaily maximum≤ 0 occur/dall year102
pH range excursions, monthly total accummonthly total≤ 446 minall year102
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year701
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year701
Mercury, total recoverablequarterly maximumreport only (ng/L)all year701

How strict are these limits?

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

Same industry: the 17 Electric Services permits in Wisconsin.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WI0061921 · MCP: https://passage-data.com/mcp