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Sewage treatment plant, Stephensville, Louisiana. NPDES permit LA0074349 expired Aug 31, 2025; its limits still apply. Last 12 months: over a limit once (last May 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| May 2026 | Coliform, fecal general, weekly geometric mean | 920.8 #/100mL | ≤ 400 #/100mL | 130% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | monthly average | ≤ 10 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 10 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 15 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 15 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 21 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 21 lb/d | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 15 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 15 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 23 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 23 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 31 lb/d | all year | 001 |
| Solids, total suspended | monthly average | ≤ 31 lb/d | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | weekly average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | weekly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 001 |
| Sulfate, total [as SO4] | monthly average | ≤ 299 lb/d | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | weekly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | weekly average | report only (MGD) | all year | 001 |
| Coliform, fecal general | monthly geometric mean | ≤ 200 #/100mL | all year | 001 |
| Coliform, fecal general | monthly geometric mean | ≤ 200 #/100mL | all year | 001 |
| Coliform, fecal general | weekly geometric mean | ≤ 400 #/100mL | all year | 001 |
| Coliform, fecal general | weekly geometric mean | ≤ 400 #/100mL | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 63 lb/d | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 63 lb/d | all year | 002 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 002 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 002 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 002 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 002 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 002 |
| Solids, total suspended | monthly average | ≤ 63 lb/d | all year | 002 |
| Solids, total suspended | monthly average | ≤ 63 lb/d | all year | 002 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, total [as N] | weekly average | report only (mg/L) | all year | 002 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 002 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | weekly average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 002 |
| Arsenic, total [as As] | monthly average | report only (mg/L) | all year | 002 |
| Arsenic, total [as As] | weekly average | report only (mg/L) | all year | 002 |
| Arsenic, total [as As] | monthly average | report only (lb/d) | all year | 002 |
| Cadmium, total [as Cd] | monthly average | report only (mg/L) | all year | 002 |
| Cadmium, total [as Cd] | weekly average | report only (mg/L) | all year | 002 |
| Cadmium, total [as Cd] | monthly average | report only (lb/d) | all year | 002 |
| Chromium, total [as Cr] | monthly average | report only (mg/L) | all year | 002 |
| Chromium, total [as Cr] | weekly average | report only (mg/L) | all year | 002 |
| Chromium, total [as Cr] | monthly average | report only (lb/d) | all year | 002 |
| Copper, total [as Cu] | monthly average | report only (mg/L) | all year | 002 |
| Copper, total [as Cu] | weekly average | report only (mg/L) | all year | 002 |
| Copper, total [as Cu] | monthly average | report only (lb/d) | all year | 002 |
| Lead, total [as Pb] | monthly average | report only (mg/L) | all year | 002 |
| Lead, total [as Pb] | weekly average | report only (mg/L) | all year | 002 |
| Lead, total [as Pb] | monthly average | report only (lb/d) | all year | 002 |
| Nickel, total [as Ni] | monthly average | report only (mg/L) | all year | 002 |
| Nickel, total [as Ni] | weekly average | report only (mg/L) | all year | 002 |
| Nickel, total [as Ni] | monthly average | report only (lb/d) | all year | 002 |
| Silver, total [as Ag] | monthly average | report only (mg/L) | all year | 002 |
| Silver, total [as Ag] | weekly average | report only (mg/L) | all year | 002 |
| Silver, total [as Ag] | monthly average | report only (lb/d) | all year | 002 |
| Zinc, total [as Zn] | monthly average | report only (mg/L) | all year | 002 |
| Zinc, total [as Zn] | weekly average | report only (mg/L) | all year | 002 |
| Zinc, total [as Zn] | monthly average | report only (lb/d) | all year | 002 |
| Selenium, total [as Se] | monthly average | report only (mg/L) | all year | 002 |
| Selenium, total [as Se] | weekly average | report only (mg/L) | all year | 002 |
| Selenium, total [as Se] | monthly average | report only (lb/d) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | weekly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | weekly average | report only (MGD) | all year | 002 |
| Wetlands Monitoring | minimum | ≥ 1 N=0;Y=1 | all year | 002 |
| Mercury, total [as Hg] | monthly average | report only (mg/L) | all year | 002 |
| Mercury, total [as Hg] | weekly average | report only (mg/L) | all year | 002 |
| Mercury, total [as Hg] | monthly average | report only (lb/d) | all year | 002 |
| Coliform, fecal general | monthly geometric mean | ≤ 200 #/100mL | all year | 002 |
| Coliform, fecal general | monthly geometric mean | ≤ 200 #/100mL | all year | 002 |
| Coliform, fecal general | weekly geometric mean | ≤ 400 #/100mL | all year | 002 |
| Coliform, fecal general | weekly geometric mean | ≤ 400 #/100mL | all year | 002 |
Cited limits by parameter: Louisiana's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
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