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Hancock County Water and Sewer District, Port Bienville Industrial Park

Sewage treatment plant, Bay Saint Louis, Mississippi. NPDES permit MS0059501, in force until Jul 31, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form Q quarterly
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 8 reports late

Limits in force (32)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimumreport only (mg/L)all year
Oxygen, dissolved [DO]maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 24 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 36 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 36 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 54.9 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmaximum monthly average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 45 mg/Lall year
Solids, total suspendedmaximum monthly average≤ 46 lb/dall year
Solids, total suspendeddaily maximum≤ 69 lb/dall year
Nitrogen, total [as N]maximum monthly averagereport only (mg/L)all year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, total [as N]maximum monthly averagereport only (lb/d)all year
Nitrogen, total [as N]daily maximumreport only (lb/d)all year
Nitrogen, ammonia total [as N]maximum monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]maximum monthly averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]maximum monthly averagereport only (lb/d)all year
Phosphorus, total [as P]daily maximumreport only (lb/d)all year
Iron, total recoverablemaximum monthly averagereport only (mg/L)all year
Iron, total recoverabledaily maximumreport only (mg/L)all year
Antimony, total recoverablemaximum monthly averagereport only (mg/L)all year
Antimony, total recoverabledaily maximumreport only (mg/L)all year
Enterococci: group D, MF trans, M-E, EIAmaximum monthly average≤ 35 #/100mLall year
Enterococci: group D, MF trans, M-E, EIAdaily maximum≤ 130 #/100mLall year
Flow, in conduit or thru treatment plantmaximum monthly average≤ .183 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Sludge settleability 30 minuteminimumreport only (mL/L)all year
Sludge settleability 30 minutemaximumreport only (mL/L)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/MS0059501 · MCP: https://passage-data.com/mcp