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Dayton Water Supply & Treatment

Water Supply, Dayton, Ohio. NPDES permit OH0151790, in force until Jun 30, 2031. Last 12 months: no values over a limit, 3 of 6 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (15 values), outfall 002 form A monthly (10 values), outfall 003 form A monthly (4 values)
Last report on file
August 2026

Limits in force (29)

ParameterStatisticLimitMonthsOutfall
Turbiditymonthly averagereport only (NTU)all year001
Turbiditydaily maximumreport only (NTU)all year001
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 11 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendeddaily maximum≤ 45 mg/Lall year001
Rainfallmonthly averagereport only (in)all year001
Rainfalldaily maximumreport only (in)all 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 residualdaily maximum≤ .038 mg/Lall 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
Turbiditymonthly averagereport only (NTU)all year002
Turbiditydaily maximumreport only (NTU)all year002
pHdaily minimum≥ 6.5 SUall year002
pHdaily maximum≤ 11 SUall year002
Solids, total suspendedmonthly average≤ 30 mg/Lall year002
Solids, total suspendeddaily maximum≤ 45 mg/Lall year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Solids, total dissolved- 180 deg. Cmonthly averagereport only (mg/L)all year002
Solids, total dissolved- 180 deg. Cdaily maximumreport only (mg/L)all 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

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.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OH0151790 · MCP: https://passage-data.com/mcp