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ST Tammany Parish Government-Northlake Behavorial Hospital

Sewage treatment plant, Mandeville, Louisiana. NPDES permit LA0127070 expired Oct 31, 2026. Last 12 months: over a limit 12 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 (32 values), form Q quarterly (12 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
4 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
November 2025BOD, carbonaceous [5 day, 20 C], monthly average8 mg/L≤ 5 mg/L60%
November 2025BOD, carbonaceous [5 day, 20 C], weekly average13 mg/L≤ 10 mg/L30%
December 2025Solids, total suspended, monthly average20 mg/L≤ 15 mg/L33%
December 2025Solids, total suspended, weekly average26 mg/L≤ 23 mg/L13%
January 2026Solids, total suspended, monthly average20 mg/L≤ 15 mg/L33%
January 2026Solids, total suspended, weekly average28 mg/L≤ 23 mg/L22%
February 2026Coliform, fecal general, weekly geometric mean736 #/100mL≤ 400 #/100mL84%
February 2026Solids, total suspended, monthly average17 mg/L≤ 15 mg/L13%
February 2026Solids, total suspended, weekly average28 mg/L≤ 23 mg/L22%
May 2026Coliform, fecal general, weekly geometric mean433 #/100mL≤ 400 #/100mL8%
May 2026Solids, total suspended, weekly average28 mg/L≤ 23 mg/L22%
June 2026BOD, carbonaceous [5 day, 20 C], monthly average7 mg/L≤ 5 mg/L40%

Limits in force (44)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly average minimum≥ 5 mg/Lall year
Oxygen, dissolved [DO]monthly average minimum≥ 5 mg/Lall year
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 suspendedweekly average≤ 23 mg/Lall year
Solids, total suspendedweekly average≤ 23 mg/Lall year
Solids, total suspendedmonthly average≤ 35 lb/dall year
Solids, total suspendedmonthly average≤ 35 lb/dall 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
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 4 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 4 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 5 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 5 lb/dall 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
Chloride [as Cl]monthly averagereport only (mg/L)all year
Chloride [as Cl]weekly averagereport only (mg/L)all year
Chloride [as Cl]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 plantweekly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Solids, total dissolvedmonthly averagereport only (mg/L)all year
Solids, total dissolvedweekly averagereport only (mg/L)all year
Solids, total dissolvedmonthly averagereport only (lb/d)all year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 12 lb/dall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 12 lb/dall year

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/LA0127070 · MCP: https://passage-data.com/mcp