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Harrison Co Utility Authority, West Biloxi Potw

Sewage treatment plant, major discharger, Biloxi, Mississippi. NPDES permit MS0030333, in force until Jun 30, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (59 values)
Renewal application due
Jan 2, 2028 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (63)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
Oxygen, dissolved [DO]minimumreport only (mg/L)all year
Oxygen, dissolved [DO]maximumreport only (mg/L)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≤ 2927 lb/dall year
Solids, total suspendedmaximum weekly average≤ 4391 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 average≤ 14 mg/LJun–Nov
Nitrogen, ammonia total [as N]monthly average≤ 15 mg/LJan, Feb, Mar, Apr, May, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 21 mg/LJun–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 22.5 mg/LJan, Feb, Mar, Apr, May, Dec
Nitrogen, ammonia total [as N]monthly average≤ 1366 lb/dJun–Nov
Nitrogen, ammonia total [as N]monthly average≤ 1464 lb/dJan, Feb, Mar, Apr, May, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 2049 lb/dJun–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 2196 lb/dJan, Feb, Mar, Apr, May, Dec
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
Copper, total recoverablemonthly averagereport only (mg/L)all year
Copper, total recoverablemaximum weekly average≤ .0124 mg/Lall year
Copper, total recoverablemonthly averagereport only (lb/d)all year
Copper, total recoverablemaximum weekly average≤ 1.21 lb/dall year
Enterococci: group D, MF trans, M-E, EIAmonthly average≤ 35 #/100mLall year
Enterococci: group D, MF trans, M-E, EIAmaximum weekly average≤ 130 #/100mLall year
Flow, in conduit or thru treatment plantmonthly average≤ 11.7 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly averagereport only (mg/L)all year
Chlorine, total residualmaximum weekly average≤ .034 mg/Lall year
BOD, carbonaceous [5 day, 5 C]monthly average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 5 C]maximum weekly average≤ 37.5 mg/Lall year
BOD, carbonaceous [5 day, 5 C]monthly average≤ 2439 lb/dall year
BOD, carbonaceous [5 day, 5 C]maximum weekly average≤ 3659 lb/dall year
BOD, carbonaceous [5 day, 5 C]monthly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 5 C]maximum weekly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 5 C]monthly averagereport only (lb/d)all year
BOD, carbonaceous [5 day, 5 C]maximum weekly averagereport only (lb/d)all year
Solids, suspended percent removalminimum≥ 85 %all year
Carbonaceous oxygen demand, % removalminimum≥ 85 %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/MS0030333 · MCP: https://passage-data.com/mcp