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Madison County Commissioners

Water Supply, London, Ohio. NPDES permit OH0101940 expired Jun 30, 2026; its limits still apply. Last 12 months: over a limit 9 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (6 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
14 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
October 2025Solids, total suspended, daily maximum46≤ 45 mg/L2%
October 2025Solids, total suspended, monthly average46≤ 30 mg/L53%
November 2025Solids, total suspended, daily maximum56≤ 45 mg/L24%
November 2025Solids, total suspended, monthly average36≤ 30 mg/L20%
January 2026Solids, total suspended, daily maximum48≤ 45 mg/L7%
January 2026Solids, total suspended, monthly average48≤ 30 mg/L60%
March 2026Solids, total suspended, monthly average31.4≤ 30 mg/L5%
June 2026Solids, total suspended, daily maximum46≤ 45 mg/L2%
June 2026Solids, total suspended, monthly average31≤ 30 mg/L3%

Limits in force (6)

ParameterStatisticLimitMonths
Flow ratemonthly averagereport only (gal/d)all year
Flow ratedaily maximumreport only (gal/d)all year
pHdaily minimum≥ 6.5 SUall year
pHdaily maximum≤ 11 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 45 mg/Lall year

How strict are these limits?

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

Same industry: the 147 Water Supply permits in Ohio.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OH0101940 · MCP: https://passage-data.com/mcp