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Heidelberg Potw

Sewage treatment plant, Heidelberg, Mississippi. NPDES permit MS0040029, in force until Jun 30, 2029. Last 12 months: over a limit 14 times (last July 2026), 1 required value missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (18 values), form Y yearly
Last report on file
September 2026
Oct 2024 – Sep 2025
12 values over a limit, 38 required values missing, 8 of 13 reports late

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

All 14 values over a limit
Period endingParameterReportedLimitOver by
October 2025Chlorine, total residual, maximum monthly average.19 mg/L≤ .031 mg/L513%
October 2025Chlorine, total residual, maximum weekly average.19 mg/L≤ .054 mg/L252%
December 2025Flow, in conduit or thru treatment plant, annual average.2548 MGD≤ .215 MGD19%
January 2026Chlorine, total residual, maximum monthly average.12 mg/L≤ .031 mg/L287%
January 2026Chlorine, total residual, maximum weekly average.12 mg/L≤ .054 mg/L122%
March 2026Chlorine, total residual, maximum monthly average.19 mg/L≤ .031 mg/L513%
March 2026Chlorine, total residual, maximum weekly average.19 mg/L≤ .054 mg/L252%
May 2026Solids, total suspended, maximum monthly average95 mg/L≤ 90 mg/L6%
May 2026pH, maximum9.5 SU≤ 9 SU—
June 2026Chlorine, total residual, maximum monthly average.13 mg/L≤ .031 mg/L319%
June 2026Chlorine, total residual, maximum weekly average.13 mg/L≤ .054 mg/L141%
July 2026Chlorine, total residual, maximum monthly average.11 mg/L≤ .031 mg/L255%
July 2026Chlorine, total residual, maximum weekly average.11 mg/L≤ .054 mg/L104%
July 2026pH, maximum9.3 SU≤ 9 SU—

Limits in force (25)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly total≤ 54 lb/dall year
BOD, 5-day, 20 deg. Cannual average≤ 54 lb/dall year
BOD, 5-day, 20 deg. Cmaximum monthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly totalreport only (lb/mo)all year
BOD, 5-day, 20 deg. Cannual averagereport only (lb/d)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmaximum monthly average≤ 90 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 135 mg/Lall year
Solids, total suspendedmonthly totalreport only (lb/mo)all year
Solids, total suspendedannual average≤ 161 lb/dall year
Solids, total suspendedmaximum monthly averagereport only (mg/L)all year
Solids, total suspendedmonthly totalreport only (lb/mo)all year
Solids, total suspendedannual averagereport only (lb/d)all year
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all year
Flow, in conduit or thru treatment plantannual average≤ .215 MGDall year
Flow, in conduit or thru treatment plantmonthly totalreport only (MGD)all year
Chlorine, total residualmaximum monthly average≤ .031 mg/Lall year
Chlorine, total residualmaximum weekly average≤ .054 mg/Lall year
E. colimaximum monthly average≤ 126 #/100mLall year
E. colimaximum weekly average≤ 410 #/100mLall year
BOD, 5-day, percent removalminimum≥ 65 %all year
Solids, suspended percent removalminimum≥ 65 %all year

How strict are these limits?

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

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/MS0040029 · MCP: https://passage-data.com/mcp