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Hattiesburg North Lagoon

Sewage treatment plant, major discharger, Hattiesburg, Mississippi. NPDES permit MS0020826, in force until Oct 31, 2030. Last 12 months: over a limit 15 times (last August 2026), 3 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (50 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
5 values over a limit, 0 required values missing, 0 of 12 reports late

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

All 15 values over a limit
Period endingParameterReportedLimitOver by
November 2025BOD, 5-day, 20 deg. C, monthly average38 mg/L≤ 30 mg/L27%
November 2025BOD, 5-day, percent removal, minimum65.7 %≥ 80 %72%
November 2025Solids, suspended percent removal, minimum30.6 %≥ 76 %189%
November 2025Solids, total suspended, monthly average49 mg/L≤ 30 mg/L63%
November 2025Solids, total suspended, maximum weekly average54 mg/L≤ 45 mg/L20%
March 2026BOD, 5-day, 20 deg. C, monthly average31 mg/L≤ 30 mg/L3%
March 2026BOD, 5-day, percent removal, minimum62.7 %≥ 80 %87%
March 2026E. coli, maximum weekly average≤ 2420 #/100mL≤ 410 #/100mL490%
March 2026Solids, suspended percent removal, minimum61.2 %≥ 76 %62%
April 2026Solids, total suspended, monthly average44 mg/L≤ 30 mg/L47%
June 2026Solids, suspended percent removal, minimum71.4 %≥ 76 %19%
July 2026Solids, suspended percent removal, minimum75.9 %≥ 76 %0%
August 2026BOD, 5-day, percent removal, minimum79.7 %≥ 80 %2%
August 2026Oxygen, dissolved [DO], minimum4.3 mg/L≥ 6 mg/L28%
August 2026Solids, suspended percent removal, minimum60.3 %≥ 76 %65%

Limits in force (50)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 1001 lb/dall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 1502 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmaximum weekly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cmaximum weekly averagereport only (lb/d)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 1001 lb/dall year
Solids, total suspendedmaximum weekly average≤ 1502 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmaximum weekly averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (lb/d)all year
Solids, total suspendedmaximum weekly averagereport only (lb/d)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Nitrogen, total [as N]maximum weekly averagereport only (lb/d)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Nitrogen, total [as N]maximum weekly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]maximum weekly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]maximum weekly averagereport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]maximum weekly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]maximum weekly averagereport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]maximum weekly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]maximum weekly averagereport only (lb/d)all year
Flow, in conduit or thru treatment plantmonthly average≤ 4 MGDall year
Chlorine, total residualmonthly average≤ .35 mg/Lall year
Chlorine, total residualmaximum weekly average≤ .6 mg/Lall year
E. colimonthly average≤ 126 #/100mLall year
E. colimaximum weekly average≤ 410 #/100mLall year
BOD, 5-day, percent removalminimum≥ 80 %all year
Solids, suspended percent removalminimum≥ 76 %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/MS0020826 · MCP: https://passage-data.com/mcp