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National Water Infrastructure LLC - Meadow Ridge Subdivision STP

Sewerage Systems, Prairieville, Louisiana. NPDES permit LA0124753, in force until Sep 30, 2030. Last 12 months: over a limit 9 times (last April 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 58 days after each period: outfall 001 form A quarterly, outfall 001 form Q quarterly, outfall 101 form A quarterly, outfall 101 form Q quarterly, outfall 201 form A quarterly, outfall 201 form Q quarterly
Last report on file
June 2026
Oct 2024 – Sep 2025
13 values over a limit, 0 required values missing, 1 of 48 reports late

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

Period endingOutfallParameterReportedLimitOver by
January 2026101Coliform, fecal general, daily maximum552 #/100mL≤ 400 #/100mL38%
February 2026101BOD, carbonaceous [5 day, 20 C], monthly average6 mg/L≤ 5 mg/L20%
March 2026001BOD, carbonaceous [5 day, 20 C], monthly average5.9 lb/d≤ 4.3 lb/d37%
March 2026001BOD, carbonaceous [5 day, 20 C], monthly average8 mg/L≤ 5 mg/L60%
March 2026001Solids, total suspended, daily maximum37 mg/L≤ 23 mg/L61%
March 2026001Solids, total suspended, monthly average< 23.269 lb/d≤ 13 lb/d79%
March 2026001Solids, total suspended, monthly average< 31 mg/L≤ 15 mg/L107%
April 2026001Nitrogen, ammonia total [as N], daily maximum4.2 mg/L≤ 4 mg/L5%
April 2026001Nitrogen, ammonia total [as N], monthly average2.5 mg/L≤ 2 mg/L25%

Limits in force (49)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly average minimum≥ 5 mg/Lall year001
pHinstantaneous minimum≥ 6 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 15 mg/Lall year001
Solids, total suspendeddaily maximum≤ 23 mg/Lall year001
Solids, total suspendedmonthly average≤ 13 lb/dall year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (lb/d)all year001
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/Lall year001
Nitrogen, ammonia total [as N]daily maximum≤ 4 mg/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ 1.7 lb/dall year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (lb/d)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualdaily maximumreport only (mg/L)all year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 5 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 4.3 lb/dall year001
Solids, total suspendedmonthly average≤ 15 mg/Lall year101
Solids, total suspendeddaily maximum≤ 23 mg/Lall year101
Nitrogen, total [as N]monthly averagereport only (mg/L)all year101
Nitrogen, total [as N]daily maximumreport only (mg/L)all year101
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/Lall year101
Nitrogen, ammonia total [as N]daily maximum≤ 4 mg/Lall year101
Phosphorus, total [as P]monthly averagereport only (mg/L)all year101
Phosphorus, total [as P]daily maximumreport only (mg/L)all year101
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year101
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year101
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year101
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year101
BOD, carbonaceous [5 day, 20 C]monthly average≤ 5 mg/Lall year101
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 10 mg/Lall year101
Solids, total suspendedmonthly average≤ 15 mg/Lall year201
Solids, total suspendeddaily maximum≤ 23 mg/Lall year201
Nitrogen, total [as N]monthly averagereport only (mg/L)all year201
Nitrogen, total [as N]daily maximumreport only (mg/L)all year201
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/Lall year201
Nitrogen, ammonia total [as N]daily maximum≤ 4 mg/Lall year201
Phosphorus, total [as P]monthly averagereport only (mg/L)all year201
Phosphorus, total [as P]daily maximumreport only (mg/L)all year201
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year201
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year201
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year201
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year201
BOD, carbonaceous [5 day, 20 C]monthly average≤ 5 mg/Lall year201
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 10 mg/Lall year201

New limits from Oct 1, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Chlorine, total residual, daily maximum0.033 mg/Lnew4 mg/L (9 values)121×

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/LA0124753 · MCP: https://passage-data.com/mcp