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West Rankin Utility Authority Wastewater Treatment Facility

Sewage treatment plant, major discharger, Richland, Mississippi. NPDES permit MS0061743, in force until Feb 28, 2030. 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 (53 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 4 of 12 reports late

Limits in force (61)

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≤ 5004 lb/dall year
Solids, total suspendedmaximum weekly average≤ 7506 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 average≤ 11.5 mg/Lall year
Nitrogen, total [as N]maximum weekly average≤ 17.25 mg/Lall year
Nitrogen, total [as N]monthly average≤ 1918 lb/dall year
Nitrogen, total [as N]maximum weekly average≤ 2877 lb/dall year
Nitrogen, total [as N]maximum monthly averagereport only (mg/L)all year
Nitrogen, total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, total [as N]maximum 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≤ 1.7 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 2.55 mg/LMay–Oct
Nitrogen, ammonia total [as N]maximum weekly average≤ 3 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 284 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 334 lb/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 425 lb/dMay–Oct
Nitrogen, ammonia total [as N]maximum weekly average≤ 500 lb/dJan, Feb, Mar, Apr, Nov, 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
Phosphorus, total [as P]monthly average≤ 2.6 mg/Lall year
Phosphorus, total [as P]maximum weekly average≤ 3.9 mg/Lall year
Phosphorus, total [as P]monthly average≤ 434 lb/dall year
Phosphorus, total [as P]maximum weekly average≤ 651 lb/dall year
Phosphorus, total [as P]maximum monthly averagereport only (mg/L)all year
Phosphorus, total [as P]maximum weekly averagereport only (mg/L)all year
Phosphorus, total [as P]maximum 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≤ 20 MGDall year
Flow, in conduit or thru treatment plantmaximum weekly averagereport only (MGD)all year
Chlorine, total residualmonthly average≤ .109 mg/Lall year
Chlorine, total residualmaximum weekly average≤ .189 mg/Lall year
E. colimaximum monthly average≤ 126 #/100mLall year
E. colimaximum weekly average≤ 410 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 12 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 6 mg/LMay–Oct
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 18 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 9 mg/LMay–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 2001 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 1000 lb/dMay–Oct
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 3002 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 1501 lb/dMay–Oct
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]maximum weekly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)all year
BOD, carbonaceous [5 day, 20 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/MS0061743 · MCP: https://passage-data.com/mcp