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National Water Infrastructure, LLC - Ole Homestead/Keystone WWTP

Sewerage Systems, Prairieville, Louisiana. NPDES permit LA0126802, in force until Jan 31, 2030. Last 12 months: over a limit 24 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 58 days after each period: form A quarterly (32 values), form Q quarterly (6 values), form Y yearly
Last report on file
June 2026
Oct 2024 – Sep 2025
104 values over a limit, 0 required values missing, 2 of 16 reports late

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

All 24 values over a limit
Period endingParameterReportedLimitOver by
November 2025BOD, carbonaceous [5 day, 20 C], daily maximum19 mg/L≤ 15 mg/L27%
November 2025BOD, carbonaceous [5 day, 20 C], monthly average14 mg/L≤ 10 mg/L40%
January 2026BOD, carbonaceous [5 day, 20 C], daily maximum30 mg/L≤ 15 mg/L100%
January 2026BOD, carbonaceous [5 day, 20 C], monthly average24 mg/L≤ 10 mg/L140%
January 2026BOD, carbonaceous [5 day, 20 C], monthly average77.9 lb/d≤ 36 lb/d116%
January 2026Nitrogen, ammonia total [as N], daily maximum14 mg/L≤ 10 mg/L40%
January 2026Nitrogen, ammonia total [as N], monthly average14 mg/L≤ 5 mg/L180%
January 2026Nitrogen, ammonia total [as N], monthly average45.1 lb/d≤ 18 lb/d151%
January 2026Solids, total suspended, daily maximum29 mg/L≤ 23 mg/L26%
January 2026Solids, total suspended, monthly average23 mg/L≤ 15 mg/L53%
January 2026Solids, total suspended, monthly average74.7 lb/d≤ 54 lb/d38%
February 2026Solids, total suspended, daily maximum56 mg/L≤ 23 mg/L143%
February 2026Solids, total suspended, monthly average26 mg/L≤ 15 mg/L73%
February 2026Solids, total suspended, monthly average55.6 lb/d≤ 54 lb/d3%
March 2026BOD, carbonaceous [5 day, 20 C], daily maximum19 mg/L≤ 15 mg/L27%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average16 mg/L≤ 10 mg/L60%
March 2026Nitrogen, ammonia total [as N], daily maximum13 mg/L≤ 10 mg/L30%
March 2026Nitrogen, ammonia total [as N], monthly average7 mg/L≤ 5 mg/L40%
April 2026BOD, carbonaceous [5 day, 20 C], daily maximum31 mg/L≤ 15 mg/L107%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average13 mg/L≤ 10 mg/L30%
April 2026Nitrogen, ammonia total [as N], daily maximum21 mg/L≤ 10 mg/L110%
April 2026Nitrogen, ammonia total [as N], monthly average13.3 mg/L≤ 5 mg/L166%
April 2026Solids, total suspended, daily maximum30 mg/L≤ 23 mg/L30%
May 2026Solids, total suspended, monthly average19 mg/L≤ 15 mg/L27%

Limits in force (41)

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≤ 54 lb/dall year
Solids, total suspendedmonthly average≤ 54 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≤ 18 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 18 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 maximumreport only (mg/L)all year
Chlorine, total residualinstantaneous maximumreport only (mg/L)all year
Mercury, total [as Hg]monthly averagereport only (mg/L)all year
Mercury, total [as Hg]daily maximumreport only (mg/L)all year
Mercury, total [as Hg]monthly averagereport only (lb/d)all 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≤ 36 lb/dall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 36 lb/dall year

New limits from Feb 1, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Chlorine, total residual, instantaneous maximum0.033 mg/Lnew3 mg/L (9 values)90.9×

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/LA0126802 · MCP: https://passage-data.com/mcp