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Sewerage District No. 1 of Tangipahoa Parish

Sewage treatment plant, Hammond, Louisiana. NPDES permit LA0123153, in force until Jun 30, 2029. Last 12 months: over a limit 23 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A quarterly (17 values), form Q quarterly (6 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
29 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 2025Nitrogen, ammonia total [as N], monthly average2.01 lb/d≤ 1.5 lb/d34%
November 2025Nitrogen, ammonia total [as N], monthly average4.8 mg/L≤ 2 mg/L140%
November 2025Nitrogen, ammonia total [as N], weekly average9.5 mg/L≤ 4 mg/L138%
November 2025Solids, total suspended, monthly average17.11 lb/d≤ 11.4 lb/d50%
November 2025Solids, total suspended, monthly average19 mg/L≤ 15 mg/L27%
December 2025BOD, carbonaceous [5 day, 20 C], monthly average7.68 lb/d≤ 7.6 lb/d1%
December 2025Nitrogen, ammonia total [as N], monthly average1.71 lb/d≤ 1.5 lb/d14%
December 2025Solids, total suspended, monthly average17.38 lb/d≤ 11.4 lb/d52%
January 2026Coliform, fecal general, monthly geometric mean216 #/100mL≤ 200 #/100mL8%
January 2026Coliform, fecal general, weekly geometric mean435 #/100mL≤ 400 #/100mL9%
January 2026Nitrogen, ammonia total [as N], monthly average1.93 lb/d≤ 1.5 lb/d29%
January 2026Nitrogen, ammonia total [as N], monthly average3.22 mg/L≤ 2 mg/L61%
January 2026Nitrogen, ammonia total [as N], weekly average6.33 mg/L≤ 4 mg/L58%
January 2026Solids, total suspended, monthly average17 mg/L≤ 15 mg/L13%
March 2026Coliform, fecal general, monthly geometric mean526 #/100mL≤ 200 #/100mL163%
March 2026Coliform, fecal general, weekly geometric mean1050 #/100mL≤ 400 #/100mL163%
May 2026Solids, total suspended, monthly average15.29 lb/d≤ 11.4 lb/d34%
May 2026Solids, total suspended, monthly average19 mg/L≤ 15 mg/L27%
June 2026Coliform, fecal general, monthly geometric mean2419 #/100mL≤ 200 #/100mL1110%
June 2026Coliform, fecal general, weekly geometric mean2419 #/100mL≤ 400 #/100mL505%
June 2026Solids, total suspended, monthly average22.5 mg/L≤ 15 mg/L50%
June 2026Solids, total suspended, monthly average27.08 lb/d≤ 11.4 lb/d138%
June 2026Solids, total suspended, weekly average30 mg/L≤ 23 mg/L30%

Limits in force (23)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly average minimum≥ 5 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
Solids, total suspendedmonthly average≤ 11.4 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]weekly average≤ 4 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 1.5 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
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Chlorine, total residualweekly averagereport only (mg/L)all year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 7.6 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/LA0123153 · MCP: https://passage-data.com/mcp