Passage Data · Check a report · Use it from your AI

Oberlin, Town of/STP

Sewage treatment plant, Oberlin, Louisiana. NPDES permit LA0020087, in force until May 31, 2028. Last 12 months: over a limit 6 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A quarterly (34 values), form Q quarterly (6 values)
Renewal application due
Dec 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
June 2026
Oct 2024 – Sep 2025
1 value 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 2025Nitrogen, ammonia total [as N], monthly average2.87 mg/L≤ 2 mg/L44%
November 2025Nitrogen, ammonia total [as N], weekly average5.72 mg/L≤ 4 mg/L43%
November 2025Oxygen, dissolved [DO], monthly average minimum5 mg/L≥ 6 mg/L17%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average24 lb/d≤ 16.7 lb/d44%
June 2026Coliform, fecal general, weekly geometric mean1300 #/100mL≤ 400 #/100mL225%
June 2026Solids, total suspended, monthly average64 lb/d≤ 50 lb/d28%

Limits in force (54)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly average minimum≥ 5 mg/LJan, Feb, Mar, Dec
Oxygen, dissolved [DO]monthly average minimum≥ 5 mg/LJan, Feb, Mar, Dec
Oxygen, dissolved [DO]monthly average minimum≥ 6 mg/LApr–Nov
Oxygen, dissolved [DO]monthly average minimum≥ 6 mg/LApr–Nov
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≤ 50 lb/dall year
Solids, total suspendedmonthly average≤ 50 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/LApr–Nov
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LApr–Nov
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan, Feb, Mar, Dec
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan, Feb, Mar, Dec
Nitrogen, ammonia total [as N]weekly average≤ 4 mg/LApr–Nov
Nitrogen, ammonia total [as N]weekly average≤ 4 mg/LApr–Nov
Nitrogen, ammonia total [as N]weekly average≤ 20 mg/LJan, Feb, Mar, Dec
Nitrogen, ammonia total [as N]weekly average≤ 20 mg/LJan, Feb, Mar, Dec
Nitrogen, ammonia total [as N]monthly average≤ 6.7 lb/dApr–Nov
Nitrogen, ammonia total [as N]monthly average≤ 6.7 lb/dApr–Nov
Nitrogen, ammonia total [as N]monthly average≤ 33.4 lb/dJan, Feb, Mar, Dec
Nitrogen, ammonia total [as N]monthly average≤ 33.4 lb/dJan, Feb, Mar, Dec
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 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
Chlorine, total residualinstantaneous maximum≤ .033 mg/Lall year
Chlorine, total residualinstantaneous maximum≤ .033 mg/Lall 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≤ 10 mg/LJan, Feb, Mar, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LJan, Feb, Mar, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 5 mg/LApr–Nov
BOD, carbonaceous [5 day, 20 C]monthly average≤ 5 mg/LApr–Nov
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/LJan, Feb, Mar, Dec
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/LJan, Feb, Mar, Dec
BOD, carbonaceous [5 day, 20 C]weekly average≤ 10 mg/LApr–Nov
BOD, carbonaceous [5 day, 20 C]weekly average≤ 10 mg/LApr–Nov
BOD, carbonaceous [5 day, 20 C]monthly average≤ 33.4 lb/dJan, Feb, Mar, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 33.4 lb/dJan, Feb, Mar, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 16.7 lb/dApr–Nov
BOD, carbonaceous [5 day, 20 C]monthly average≤ 16.7 lb/dApr–Nov

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

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/LA0020087 · MCP: https://passage-data.com/mcp