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Erath Town of - Erath Municipal Sewage Treatment Plant

Sewage treatment plant, Erath, Louisiana. NPDES permit LA0054739, in force until Sep 30, 2031. Last 12 months: over a limit 40 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Last report on file
June 2026
Oct 2024 – Sep 2025
48 values over a limit, 0 required values missing, 0 of 16 reports late

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

All 40 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, carbonaceous [5 day, 20 C], monthly average15 mg/L≤ 5 mg/L200%
October 2025BOD, carbonaceous [5 day, 20 C], weekly average19 mg/L≤ 10 mg/L90%
October 2025Coliform, fecal general, monthly geometric mean> 2419.6 #/100mL≤ 200 #/100mL—
October 2025Coliform, fecal general, weekly geometric mean> 2419.6 #/100mL≤ 400 #/100mL—
November 2025BOD, carbonaceous [5 day, 20 C], monthly average16 mg/L≤ 5 mg/L220%
November 2025BOD, carbonaceous [5 day, 20 C], weekly average20 mg/L≤ 10 mg/L100%
November 2025Coliform, fecal general, monthly geometric mean> 2419.6 #/100mL≤ 200 #/100mL—
November 2025Coliform, fecal general, weekly geometric mean> 2419.6 #/100mL≤ 400 #/100mL—
November 2025Solids, total suspended, monthly average23 mg/L≤ 15 mg/L53%
November 2025Solids, total suspended, weekly average28 mg/L≤ 23 mg/L22%
December 2025BOD, carbonaceous [5 day, 20 C], monthly average12 mg/L≤ 5 mg/L140%
December 2025BOD, carbonaceous [5 day, 20 C], weekly average16 mg/L≤ 10 mg/L60%
December 2025Coliform, fecal general, monthly geometric mean> 2419.6 #/100mL≤ 200 #/100mL—
December 2025Coliform, fecal general, weekly geometric mean> 2419.6 #/100mL≤ 400 #/100mL—
January 2026BOD, carbonaceous [5 day, 20 C], monthly average34 lb/d≤ 21 lb/d62%
January 2026BOD, carbonaceous [5 day, 20 C], monthly average9 mg/L≤ 5 mg/L80%
January 2026BOD, carbonaceous [5 day, 20 C], weekly average11 mg/L≤ 10 mg/L10%
January 2026Coliform, fecal general, monthly geometric mean> 2419.6 #/100mL≤ 200 #/100mL—
January 2026Coliform, fecal general, weekly geometric mean> 2419.6 #/100mL≤ 400 #/100mL—
January 2026Nitrogen, ammonia total [as N], monthly average11.7 lb/d≤ 8 lb/d46%
January 2026Nitrogen, ammonia total [as N], monthly average3.2 mg/L≤ 2 mg/L60%
January 2026Nitrogen, ammonia total [as N], weekly average7.2 mg/L≤ 4 mg/L80%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average9 mg/L≤ 5 mg/L80%
February 2026Coliform, fecal general, monthly geometric mean> 2419.6 #/100mL≤ 200 #/100mL—
February 2026Coliform, fecal general, weekly geometric mean> 2419.6 #/100mL≤ 400 #/100mL—
February 2026Nitrogen, ammonia total [as N], monthly average2.02 mg/L≤ 2 mg/L1%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average12 mg/L≤ 5 mg/L140%
March 2026BOD, carbonaceous [5 day, 20 C], weekly average12 mg/L≤ 10 mg/L20%
March 2026Coliform, fecal general, monthly geometric mean2419.6 #/100mL≤ 200 #/100mL1110%
March 2026Coliform, fecal general, weekly geometric mean2419.6 #/100mL≤ 400 #/100mL505%
April 2026Coliform, fecal general, monthly geometric mean2047.7 #/100mL≤ 200 #/100mL924%
April 2026Coliform, fecal general, weekly geometric mean2419.6 #/100mL≤ 400 #/100mL505%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average11 mg/L≤ 5 mg/L120%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average37 lb/d≤ 21 lb/d76%
May 2026BOD, carbonaceous [5 day, 20 C], weekly average12 mg/L≤ 10 mg/L20%
May 2026Coliform, fecal general, monthly geometric mean> 2419.6 #/100mL≤ 200 #/100mL—
May 2026Coliform, fecal general, weekly geometric mean> 2419.6 #/100mL≤ 400 #/100mL—
June 2026BOD, carbonaceous [5 day, 20 C], monthly average8 mg/L≤ 5 mg/L60%
June 2026Coliform, fecal general, monthly geometric mean2419.6 #/100mL≤ 200 #/100mL1110%
June 2026Coliform, fecal general, weekly geometric mean2419.6 #/100mL≤ 400 #/100mL505%

Limits in force (30)

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≤ 63 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly averagereport only (mg/L)all 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≤ 8 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
Enterococcimonthly geometric mean≤ 35 #/100mLMay–Oct
Enterococciweekly geometric mean≤ 130 #/100mLMay–Oct
Coliform, fecal generalmonthly geometric mean≤ 200 #/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]weekly average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 21 lb/dall year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (mg/L)all year
BOD, carbonaceous, percent removalminimum≥ 85 %all year
Solids, suspended percent removalminimum≥ 85 %all 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/LA0054739 · MCP: https://passage-data.com/mcp