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City of Columbus Dept of Utilities

Water Supply, Columbus, Ohio. NPDES permit OH0030716, in force until Oct 31, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 002 form A monthly (8 values), outfall 004 form A monthly (8 values)
Renewal application due
May 4, 2027 · 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 24 reports late

Limits in force (16)

ParameterStatisticLimitMonthsOutfall
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
Trihalomethane, tot.monthly averagereport only (ug/L)Sep002
Trihalomethane, tot.daily maximumreport only (ug/L)Sep002
pHdaily minimum≥ 6.5 SUall year004
pHdaily maximum≤ 11 SUall year004
Solids, total suspendedmonthly average≤ 30 mg/Lall year004
Solids, total suspendeddaily maximum≤ 45 mg/Lall year004
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year004
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year004
Trihalomethane, tot.monthly averagereport only (ug/L)Sep004
Trihalomethane, tot.daily maximumreport only (ug/L)Sep004

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/OH0030716 · MCP: https://passage-data.com/mcp