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ST. Tammany Parish Govt -Tammany Utilities

Sewage treatment plant, Lacombe, Louisiana. NPDES permit LA0124214, in force until Sep 30, 2029. Last 12 months: over a limit 11 times (last June 2026), 4 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A quarterly (12 values), form Q quarterly (6 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 16 reports late

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

Period endingParameterReportedLimitOver by
March 2026BOD, 5-day, 20 deg. C, monthly average11 mg/L≤ 10 mg/L10%
March 2026Coliform, fecal general, monthly geometric mean642 #/100mL≤ 200 #/100mL221%
March 2026Coliform, fecal general, weekly geometric mean642 #/100mL≤ 400 #/100mL61%
March 2026Solids, total suspended, monthly average40 mg/L≤ 15 mg/L167%
March 2026Solids, total suspended, weekly average40 mg/L≤ 23 mg/L74%
April 2026BOD, 5-day, 20 deg. C, monthly average20 mg/L≤ 10 mg/L100%
April 2026BOD, 5-day, 20 deg. C, weekly average20 mg/L≤ 15 mg/L33%
April 2026Solids, total suspended, monthly average28 mg/L≤ 15 mg/L87%
April 2026Solids, total suspended, weekly average28 mg/L≤ 23 mg/L22%
June 2026BOD, 5-day, 20 deg. C, monthly average15 mg/L≤ 10 mg/L50%
June 2026Solids, total suspended, monthly average17 mg/L≤ 15 mg/L13%

Limits in force (18)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/Lall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspendedweekly average≤ 23 mg/Lall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]weekly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]weekly averagereport 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 plantweekly averagereport only (MGD)all year
Enterococcimonthly geometric mean≤ 35 #/100mLMay–Oct
Enterococciweekly geometric mean≤ 135 #/100mLMay–Oct
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year

New limits from Sep 30, 2029

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Chlorine, total residual, instantaneous maximum0.033 mg/Lnew——

How strict are these limits?

Cited limits by parameter: Louisiana'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/LA0124214 · MCP: https://passage-data.com/mcp