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Greater Ouachita Water Co.,Inc

Sewerage Systems, West Monroe, Louisiana. NPDES permit LA0110485, in force until May 31, 2028. Last 12 months: over a limit 23 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A quarterly (32 values), form Q quarterly (6 values)
Renewal application due
Dec 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
10 values over a limit, 0 required values missing, 0 of 16 reports late

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

All 23 values over a limit
Period endingParameterReportedLimitOver by
November 2025Solids, total suspended, daily maximum25 mg/L≤ 23 mg/L9%
November 2025Solids, total suspended, monthly average16.26 mg/L≤ 15 mg/L8%
January 2026BOD, carbonaceous [5 day, 20 C], daily maximum38.2 mg/L≤ 15 mg/L155%
January 2026BOD, carbonaceous [5 day, 20 C], monthly average20.35 mg/L≤ 10 mg/L104%
January 2026BOD, carbonaceous [5 day, 20 C], monthly average53.53 lb/d≤ 48 lb/d12%
January 2026Solids, total suspended, daily maximum51 mg/L≤ 23 mg/L122%
January 2026Solids, total suspended, monthly average31.05 mg/L≤ 15 mg/L107%
January 2026Solids, total suspended, monthly average81.65 lb/d≤ 73 lb/d12%
February 2026Solids, total suspended, monthly average15.79 mg/L≤ 15 mg/L5%
March 2026BOD, carbonaceous [5 day, 20 C], daily maximum51.8 mg/L≤ 15 mg/L245%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average20.64 mg/L≤ 10 mg/L106%
March 2026Solids, total suspended, daily maximum49 mg/L≤ 23 mg/L113%
March 2026Solids, total suspended, monthly average21.24 mg/L≤ 15 mg/L42%
April 2026BOD, carbonaceous [5 day, 20 C], daily maximum35.1 mg/L≤ 15 mg/L134%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average13.43 mg/L≤ 10 mg/L34%
April 2026Coliform, fecal general, daily maximum820 #/100mL≤ 400 #/100mL105%
April 2026Solids, total suspended, daily maximum36 mg/L≤ 23 mg/L57%
April 2026Solids, total suspended, monthly average18.63 mg/L≤ 15 mg/L24%
May 2026Solids, total suspended, daily maximum30 mg/L≤ 23 mg/L30%
May 2026Solids, total suspended, monthly average20.31 mg/L≤ 15 mg/L35%
September 2026BOD, carbonaceous [5 day, 20 C], daily maximum29.2 mg/L≤ 15 mg/L95%
September 2026BOD, carbonaceous [5 day, 20 C], monthly average11.67 mg/L≤ 10 mg/L17%
September 2026Solids, total suspended, daily maximum30 mg/L≤ 23 mg/L30%

Limits in force (38)

ParameterStatisticLimitMonths
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspendeddaily maximum≤ 23 mg/Lall year
Solids, total suspendeddaily maximum≤ 23 mg/Lall year
Solids, total suspendedmonthly average≤ 73 lb/dall year
Solids, total suspendedmonthly average≤ 73 lb/dall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 10 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 10 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 24 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 24 lb/dall year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualinstantaneous maximum≤ .033 mg/Lall year
Chlorine, total residualinstantaneous maximum≤ .033 mg/Lall year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 48 lb/dall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 48 lb/dall year

New limits from Jun 1, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Nitrogen, ammonia total [as N], daily maximum4.7 mg/Ltighter0.0455 mg/L (12 values, 1 below detection)0.00968×
Nitrogen, ammonia total [as N], monthly average2 mg/Ltighter0.0325 mg/L (12 values, 1 below detection)0.0163×
Nitrogen, ammonia total [as N], monthly average9.5 lb/dtighter0.0735 lb/d (12 values)0.00774×

How strict are these limits?

Cited limits by parameter: Louisiana'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/LA0110485 · MCP: https://passage-data.com/mcp