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City of Wilmington Water Dept

Water Supply, Wilmington, Ohio. NPDES permit OH0041891, in force until Jun 30, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (8 values), outfall 002 form A monthly (3 values)
Renewal application due
Jan 2, 2028 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 36 reports late

Limits in force (21)

ParameterStatisticLimitMonthsOutfall
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendeddaily maximum≤ 45 mg/Lall 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
Solids, total dissolved- 180 deg. Cmonthly averagereport only (mg/L)all year001
Solids, total dissolved- 180 deg. Cdaily maximumreport only (mg/L)all year001
Trihalomethane, tot.monthly averagereport only (ug/L)Sep001
Trihalomethane, tot.daily maximumreport only (ug/L)Sep001
pHdaily minimum≥ 6.5 SUall year002
pHdaily maximum≤ 9 SUall year002
Chlorine, total residualdaily maximum≤ .019 mg/Lall year002
pHdaily minimumreport only (SU)all year003
pHdaily maximumreport only (SU)all year003
Solids, total suspendedmonthly averagereport only (mg/L)all year003
Solids, total suspendeddaily maximumreport only (mg/L)all year003
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
Microcystinmonthly averagereport only (ug/L)all year003
Microcystindaily maximumreport only (ug/L)all year003
Solids, total dissolved- 180 deg. Cmonthly averagereport only (mg/L)all year003
Solids, total dissolved- 180 deg. Cdaily maximumreport only (mg/L)all year003

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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Your permit document is the final word. As JSON: /api/v1/permits/OH0041891 · MCP: https://passage-data.com/mcp