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Meridian Potw

Sewage treatment plant, major discharger, Meridian, Mississippi. NPDES permit MS0020117, in force until Oct 31, 2030. Last 12 months: over a limit 7 times (last June 2026), 4 required values missing, 12 of 33 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 002 form A monthly (27 values), outfall 101 form A monthly (50 values), outfall 201 form A monthly (43 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
10 values over a limit, 0 required values missing, 9 of 36 reports late

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

Period endingOutfallParameterReportedLimitOver by
October 2025002Copper, total recoverable, monthly average.0118 mg/L≤ .0052 mg/L127%
October 2025002Copper, total recoverable, maximum weekly average.017 mg/L≤ .0072 mg/L136%
October 2025101Solids, total suspended, monthly average31.5 mg/L≤ 30 mg/L5%
October 2025101Solids, total suspended, maximum weekly average52.2 mg/L≤ 45 mg/L16%
May 2026101BOD, carb-5 day, 20 deg C, percent removal, minimum84 %≥ 85 %7%
May 2026101Solids, suspended percent removal, minimum80 %≥ 85 %33%
June 2026101Solids, suspended percent removal, minimum81 %≥ 85 %27%

Limits in force (144)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year002
pHminimum≥ 6 SUall year002
pHmaximum≤ 9 SUall year002
Solids, total suspendedmonthly average≤ 3253 lb/dall year002
Solids, total suspendedmaximum weekly average≤ 4879 lb/dall year002
Nitrogen, total [as N]monthly averagereport only (lb/d)all year002
Nitrogen, total [as N]maximum weekly averagereport only (lb/d)all year002
Nitrogen, ammonia total [as N]monthly average≤ 1 mg/LMay–Nov002
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LJan, Feb, Mar, Apr, Dec002
Nitrogen, ammonia total [as N]maximum weekly average≤ 1.5 mg/LMay–Nov002
Nitrogen, ammonia total [as N]maximum monthly average≤ 3 mg/LJan, Feb, Mar, Apr, Dec002
Nitrogen, ammonia total [as N]monthly average≤ 108 lb/dMay–Nov002
Nitrogen, ammonia total [as N]monthly average≤ 217 lb/dJan, Feb, Mar, Apr, Dec002
Nitrogen, ammonia total [as N]maximum weekly average≤ 163 lb/dMay–Nov002
Nitrogen, ammonia total [as N]maximum weekly average≤ 325 lb/dJan, Feb, Mar, Apr, Dec002
Phosphorus, total [as P]monthly averagereport only (lb/d)all year002
Phosphorus, total [as P]maximum weekly averagereport only (lb/d)all year002
Copper, total recoverablemonthly average≤ .011 mg/Lall year002
Copper, total recoverablemaximum weekly average≤ .012 mg/Lall year002
Flow, in conduit or thru treatment plantmonthly average≤ 13 MGDall year002
Flow, in conduit or thru treatment plantmaximum weekly averagereport only (MGD)all year002
Chlorine, total residualmonthly average≤ .011 mg/Lall year002
Chlorine, total residualmaximum weekly average≤ .019 mg/Lall year002
E. colimonthly average≤ 126 #/100mLall year002
E. colimaximum weekly average≤ 410 #/100mLall year002
BOD, carbonaceous [5 day, 20 C]monthly average≤ 7 mg/LMay–Nov002
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LJan, Feb, Mar, Apr, Dec002
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 10.5 mg/LMay–Nov002
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 15 mg/LJan, Feb, Mar, Apr, Dec002
BOD, carbonaceous [5 day, 20 C]monthly average≤ 1084 lb/dJan, Feb, Mar, Apr, Dec002
BOD, carbonaceous [5 day, 20 C]monthly average≤ 759 lb/dMay–Nov002
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 1627 lb/dJan, Feb, Mar, Apr, Dec002
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 1138 lb/dMay–Nov002
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum≥ 89.74 %all year002
%Effect Static Renewal 7Day Chronic Pimephales promelasminimum≥ 89.74 %all year002
Oxygen, dissolved [DO]minimumreport only (mg/L)all year101
Oxygen, dissolved [DO]maximumreport only (mg/L)all year101
pHminimumreport only (SU)all year101
pHmaximumreport only (SU)all year101
Solids, total suspendedmonthly average≤ 30 mg/Lall year101
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year101
Solids, total suspendedmonthly averagereport only (lb/d)all year101
Solids, total suspendedmaximum weekly averagereport only (lb/d)all year101
Solids, total suspendedmonthly averagereport only (mg/L)all year101
Solids, total suspendedmaximum weekly averagereport only (mg/L)all year101
Solids, total suspendedmonthly averagereport only (lb/d)all year101
Solids, total suspendedmaximum weekly averagereport only (lb/d)all year101
Nitrogen, total [as N]monthly averagereport only (mg/L)all year101
Nitrogen, total [as N]maximum weekly averagereport only (mg/L)all year101
Nitrogen, total [as N]monthly totalreport only (lb/d)all year101
Nitrogen, total [as N]maximum weekly averagereport only (lb/d)all year101
Nitrogen, total [as N]monthly averagereport only (mg/L)all year101
Nitrogen, total [as N]maximum weekly averagereport only (mg/L)all year101
Nitrogen, total [as N]monthly totalreport only (lb/d)all year101
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LJan, Feb, Mar, Apr, Dec101
Nitrogen, ammonia total [as N]monthly average≤ 1 mg/LMay–Nov101
Nitrogen, ammonia total [as N]maximum weekly average≤ 3 mg/LJan, Feb, Mar, Apr, Dec101
Nitrogen, ammonia total [as N]maximum weekly average≤ 1.5 mg/LMay–Nov101
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Jan, Feb, Mar, Apr, Dec101
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)May–Nov101
Nitrogen, ammonia total [as N]maximum weekly averagereport only (lb/d)Jan, Feb, Mar, Apr, Dec101
Nitrogen, ammonia total [as N]maximum weekly averagereport only (lb/d)May–Nov101
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year101
Nitrogen, ammonia total [as N]maximum weekly averagereport only (mg/L)all year101
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)all year101
Nitrogen, ammonia total [as N]maximum weekly averagereport only (lb/d)all year101
Phosphorus, total [as P]monthly averagereport only (mg/L)all year101
Phosphorus, total [as P]maximum weekly averagereport only (mg/L)all year101
Phosphorus, total [as P]monthly totalreport only (lb/d)all year101
Phosphorus, total [as P]monthly averagereport only (mL/L)all year101
Phosphorus, total [as P]maximum weekly averagereport only (mL/L)all year101
Phosphorus, total [as P]monthly totalreport only (lb/d)all year101
Copper, total recoverablemonthly averagereport only (mg/L)all year101
Copper, total recoverablemaximum weekly averagereport only (mg/L)all year101
Flow, in conduit or thru treatment plantmonthly average≤ 13 MGDall year101
Flow, in conduit or thru treatment plantmaximum weekly averagereport only (MGD)all year101
Chlorine, total residualminimum≥ .3 mg/Lall year101
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LJan, Feb, Mar, Apr, Dec101
BOD, carbonaceous [5 day, 20 C]monthly average≤ 7 mg/LMay–Nov101
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 15 mg/LJan, Feb, Mar, Apr, Dec101
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 10.5 mg/LMay–Nov101
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)Jan, Feb, Mar, Apr, Dec101
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)May–Nov101
BOD, carbonaceous [5 day, 20 C]maximum weekly averagereport only (lb/d)Jan, Feb, Mar, Apr, Dec101
BOD, carbonaceous [5 day, 20 C]maximum weekly averagereport only (lb/d)May–Nov101
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year101
BOD, carbonaceous [5 day, 20 C]maximum weekly averagereport only (mg/L)all year101
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)all year101
BOD, carbonaceous [5 day, 20 C]maximum weekly averagereport only (lb/d)all year101
BOD, carb-5 day, 20 deg C, percent removalminimum≥ 85 %all year101
Solids, suspended percent removalminimum≥ 85 %all year101
Sludge settleability 30 minuteminimumreport only (mL/L)all year101
Sludge settleability 30 minutemaximumreport only (mL/L)all year101
Oxygen, dissolved [DO]minimumreport only (mg/L)all year201
Oxygen, dissolved [DO]maximumreport only (mg/L)all year201
pHminimumreport only (SU)all year201
pHmaximumreport only (SU)all year201
Solids, total suspendedmonthly average≤ 30 mg/Lall year201
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year201
Solids, total suspendedmonthly averagereport only (lb/d)all year201
Solids, total suspendedmaximum weekly averagereport only (lb/d)all year201
Solids, total suspendedmonthly averagereport only (mg/L)all year201
Solids, total suspendedmaximum weekly averagereport only (mg/L)all year201
Solids, total suspendedmonthly averagereport only (lb/d)all year201
Solids, total suspendedmaximum weekly averagereport only (lb/d)all year201
Nitrogen, total [as N]monthly averagereport only (mg/L)all year201
Nitrogen, total [as N]maximum weekly averagereport only (mg/L)all year201
Nitrogen, total [as N]monthly totalreport only (lb/d)all year201
Nitrogen, ammonia total [as N]monthly average≤ 1 mg/LMay–Nov201
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LJan, Feb, Mar, Apr, Dec201
Nitrogen, ammonia total [as N]maximum weekly average≤ 1.5 mg/LMay–Nov201
Nitrogen, ammonia total [as N]maximum weekly average≤ 3 mg/LJan, Feb, Mar, Apr, Dec201
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)May–Nov201
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Jan, Feb, Mar, Apr, Dec201
Nitrogen, ammonia total [as N]maximum weekly averagereport only (lb/d)May–Nov201
Nitrogen, ammonia total [as N]maximum weekly averagereport only (lb/d)Jan, Feb, Mar, Apr, Dec201
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year201
Nitrogen, ammonia total [as N]maximum weekly averagereport only (mg/L)all year201
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)all year201
Nitrogen, ammonia total [as N]maximum weekly averagereport only (lb/d)all year201
Phosphorus, total [as P]monthly averagereport only (mg/L)all year201
Phosphorus, total [as P]maximum weekly averagereport only (mg/L)all year201
Phosphorus, total [as P]monthly totalreport only (lb/d)all year201
Phosphorus, total [as P]monthly averagereport only (mg/L)all year201
Phosphorus, total [as P]maximum weekly averagereport only (mg/L)all year201
Phosphorus, total [as P]monthly totalreport only (lb/d)all year201
Flow, in conduit or thru treatment plantmonthly average≤ 1 MGDall year201
Flow, in conduit or thru treatment plantmaximum weekly averagereport only (MGD)all year201
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LJan, Feb, Mar, Apr, Dec201
BOD, carbonaceous [5 day, 20 C]monthly average≤ 7 mg/LMay–Nov201
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 15 mg/LJan, Feb, Mar, Apr, Dec201
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 10.5 mg/LMay–Nov201
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)Jan, Feb, Mar, Apr, Dec201
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)May–Nov201
BOD, carbonaceous [5 day, 20 C]maximum weekly averagereport only (lb/d)Jan, Feb, Mar, Apr, Dec201
BOD, carbonaceous [5 day, 20 C]maximum weekly averagereport only (lb/d)May–Nov201
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year201
BOD, carbonaceous [5 day, 20 C]maximum weekly averagereport only (mg/L)all year201
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)all year201
BOD, carbonaceous [5 day, 20 C]maximum weekly averagereport only (lb/d)all year201
BOD, carb-5 day, 20 deg C, percent removalminimum≥ 85 %all year201
Solids, suspended percent removalminimum≥ 85 %all year201
Sludge settleability 30 minuteminimumreport only (mL/L)all year201
Sludge settleability 30 minutemaximumreport only (mL/L)all year201

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MS0020117 · MCP: https://passage-data.com/mcp