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Sewerage District #1 of Tangipahoa Parish - Northwest Hammond Treatment Facility

Sewage treatment plant, Hammond, Louisiana. NPDES permit LA0119466, in force until Jul 31, 2028. Last 12 months: over a limit 16 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A quarterly, outfall 001 form Q quarterly, outfall 001 form Y yearly, outfall 01A form A quarterly
Renewal application due
Feb 2, 2028 · 180 days before expiry; your permit may set another date
Last report on file
June 2026
Oct 2024 – Sep 2025
42 values over a limit, 0 required values missing, 0 of 16 reports late

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

All 16 values over a limit
Period endingOutfallParameterReportedLimitOver by
November 2025001Nitrogen, ammonia total [as N], monthly average5.05 mg/L≤ 5 mg/L1%
December 2025001BOD, carbonaceous [5 day, 20 C], monthly average11 mg/L≤ 10 mg/L10%
December 2025001Coliform, fecal general, monthly geometric mean2419 #/100mL≤ 200 #/100mL1110%
December 2025001Coliform, fecal general, weekly geometric mean2419 #/100mL≤ 400 #/100mL505%
December 2025001Nitrogen, ammonia total [as N], monthly average6.35 mg/L≤ 5 mg/L27%
January 2026001Nitrogen, ammonia total [as N], monthly average10.8 mg/L≤ 5 mg/L116%
January 2026001Nitrogen, ammonia total [as N], weekly average10.8 mg/L≤ 10 mg/L8%
February 2026001Nitrogen, ammonia total [as N], monthly average6.71 mg/L≤ 5 mg/L34%
March 2026001BOD, carbonaceous [5 day, 20 C], monthly average10.3 mg/L≤ 10 mg/L3%
March 2026001Coliform, fecal general, monthly geometric mean353 #/100mL≤ 200 #/100mL77%
March 2026001Coliform, fecal general, weekly geometric mean1410 #/100mL≤ 400 #/100mL253%
April 2026001Solids, total suspended, monthly average16 mg/L≤ 15 mg/L7%
April 202601ANitrogen, ammonia total [as N], monthly average6.26 mg/L≤ 5 mg/L25%
May 2026001Coliform, fecal general, monthly geometric mean2419 #/100mL≤ 200 #/100mL1110%
May 2026001Coliform, fecal general, weekly geometric mean2419 #/100mL≤ 400 #/100mL505%
May 202601ANitrogen, ammonia total [as N], monthly average6.18 mg/L≤ 5 mg/L24%

Limits in force (48)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly average minimum≥ 5 mg/Lall year001
Oxygen, dissolved [DO]monthly average minimum≥ 5 mg/Lall year001
pHinstantaneous minimum≥ 6 SUall year001
pHinstantaneous minimum≥ 6 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 15 mg/Lall year001
Solids, total suspendedmonthly average≤ 15 mg/Lall year001
Solids, total suspendedweekly average≤ 23 mg/Lall year001
Solids, total suspendedweekly average≤ 23 mg/Lall year001
Solids, total suspendedmonthly average≤ 38 lb/dall year001
Solids, total suspendedmonthly average≤ 38 lb/dall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendedweekly averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]weekly averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (lb/d)all year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]weekly averagereport 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 plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year001
Chlorine, total residualinstantaneous maximum≤ .033 mg/Lall year001
Chlorine, total residualinstantaneous maximum≤ .033 mg/Lall year001
Solids, total dissolvedmonthly average≤ 375.5 lb/dall year001
Solids, total dissolvedmonthly average≤ 375.5 lb/dall year001
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year001
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year001
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year001
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 lb/dall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 lb/dall year001
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year001
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (mg/L)all year001
BOD, carbonaceous, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/Lall year01A
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/Lall year01A
Nitrogen, ammonia total [as N]weekly average≤ 5 mg/Lall year01A
Nitrogen, ammonia total [as N]weekly average≤ 5 mg/Lall year01A
Nitrogen, ammonia total [as N]monthly average≤ 12.4 lb/dall year01A
Nitrogen, ammonia total [as N]monthly average≤ 12.4 lb/dall year01A

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/LA0119466 · MCP: https://passage-data.com/mcp