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Sewerage Systems, major discharger, Madisonville, Louisiana. NPDES permit LA0120243 expired Aug 31, 2025; its limits still apply. Last 12 months: over a limit 5 times (last June 2026), 9 of 17 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Coliform, fecal general, daily maximum | 3680 #/100mL | ≤ 400 #/100mL | 820% |
| December 2025 | BOD, 5-day, 20 deg. C, daily maximum | 153 mg/L | ≤ 45 mg/L | 240% |
| December 2025 | BOD, 5-day, 20 deg. C, monthly average | 32 mg/L | ≤ 30 mg/L | 7% |
| February 2026 | Coliform, fecal general, daily maximum | 724 #/100mL | ≤ 400 #/100mL | 81% |
| June 2026 | Coliform, fecal general, daily maximum | 416 #/100mL | ≤ 400 #/100mL | 4% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 45 mg/L | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 258 lb/d | all year |
| pH | instantaneous minimum | ≥ 6 SU | all year |
| pH | instantaneous maximum | ≤ 8.5 SU | all year |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year |
| Solids, total suspended | monthly average | ≤ 258 lb/d | all year |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | all year |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | all year |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year |
| Arsenic, total [as As] | monthly average | report only (mg/L) | all year |
| Arsenic, total [as As] | monthly average | report only (mg/L) | all year |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year |
| Arsenic, total [as As] | monthly average | ≤ 1.9 lb/d | all year |
| Arsenic, total [as As] | monthly average | ≤ 1.9 lb/d | all year |
| Arsenic, total [as As] | daily maximum | ≤ 4.6 lb/d | all year |
| Arsenic, total [as As] | daily maximum | ≤ 4.6 lb/d | all year |
| Cadmium, total [as Cd] | monthly average | report only (mg/L) | all year |
| Cadmium, total [as Cd] | monthly average | report only (mg/L) | all year |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year |
| Cadmium, total [as Cd] | monthly average | ≤ .017 lb/d | all year |
| Cadmium, total [as Cd] | monthly average | ≤ .017 lb/d | all year |
| Cadmium, total [as Cd] | daily maximum | ≤ .04 lb/d | all year |
| Cadmium, total [as Cd] | daily maximum | ≤ .04 lb/d | all year |
| Chromium, total [as Cr] | monthly average | report only (mg/L) | all year |
| Chromium, total [as Cr] | monthly average | report only (mg/L) | all year |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year |
| Chromium, total [as Cr] | monthly average | report only (lb/d) | all year |
| Chromium, total [as Cr] | monthly average | report only (lb/d) | all year |
| Copper, total [as Cu] | monthly average | report only (mg/L) | all year |
| Copper, total [as Cu] | monthly average | report only (mg/L) | all year |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year |
| Copper, total [as Cu] | monthly average | ≤ .119 lb/d | all year |
| Copper, total [as Cu] | monthly average | ≤ .119 lb/d | all year |
| Copper, total [as Cu] | daily maximum | ≤ .283 lb/d | all year |
| Copper, total [as Cu] | daily maximum | ≤ .283 lb/d | all year |
| Lead, total [as Pb] | monthly average | report only (mg/L) | all year |
| Lead, total [as Pb] | monthly average | report only (mg/L) | all year |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year |
| Lead, total [as Pb] | monthly average | ≤ .052 lb/d | all year |
| Lead, total [as Pb] | monthly average | ≤ .052 lb/d | all year |
| Lead, total [as Pb] | daily maximum | ≤ .125 lb/d | all year |
| Lead, total [as Pb] | daily maximum | ≤ .125 lb/d | all year |
| Nickel, total [as Ni] | monthly average | report only (mg/L) | all year |
| Nickel, total [as Ni] | monthly average | report only (mg/L) | all year |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year |
| Nickel, total [as Ni] | monthly average | report only (lb/d) | all year |
| Nickel, total [as Ni] | monthly average | report only (lb/d) | all year |
| Silver, total [as Ag] | monthly average | report only (mg/L) | all year |
| Silver, total [as Ag] | monthly average | report only (mg/L) | all year |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year |
| Silver, total [as Ag] | monthly average | report only (lb/d) | all year |
| Silver, total [as Ag] | monthly average | report only (lb/d) | all year |
| Zinc, total [as Zn] | monthly average | report only (mg/L) | all year |
| Zinc, total [as Zn] | monthly average | report only (mg/L) | all year |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year |
| Zinc, total [as Zn] | monthly average | report only (lb/d) | all year |
| Zinc, total [as Zn] | monthly average | report only (lb/d) | all year |
| Selenium, total [as Se] | monthly average | report only (mg/L) | all year |
| Selenium, total [as Se] | monthly average | report only (mg/L) | all year |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year |
| Selenium, total [as Se] | monthly average | report only (lb/d) | all year |
| Selenium, total [as Se] | monthly average | report only (lb/d) | all year |
| Whole effluent toxicity - retest #1 | 48-hour minimum | report only (pass=0;fail=1) | all year |
| Whole effluent toxicity - retest #1 | 48-hour minimum | report only (pass=0;fail=1) | all year |
| Whole effluent toxicity - retest #1 | monthly average minimum | report only (pass=0;fail=1) | all year |
| Whole effluent toxicity - retest #1 | monthly average minimum | report only (pass=0;fail=1) | all year |
| Whole effluent toxicity - retest #2 | 48-hour minimum | report only (pass=0;fail=1) | all year |
| Whole effluent toxicity - retest #2 | 48-hour minimum | report only (pass=0;fail=1) | all year |
| Whole effluent toxicity - retest #2 | monthly average minimum | report only (pass=0;fail=1) | all year |
| Whole effluent toxicity - retest #2 | monthly average minimum | report only (pass=0;fail=1) | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Whole Effluent Toxicity - Retest #3 | 48-hour minimum | report only (pass=0;fail=1) | all year |
| Whole Effluent Toxicity - Retest #3 | 48-hour minimum | report only (pass=0;fail=1) | all year |
| Whole Effluent Toxicity - Retest #3 | monthly average minimum | report only (pass=0;fail=1) | all year |
| Whole Effluent Toxicity - Retest #3 | monthly average minimum | report only (pass=0;fail=1) | all year |
| Wetlands Monitoring | minimum | ≥ 1 N=0;Y=1 | all year |
| Mercury, total [as Hg] | monthly average | report only (mg/L) | all year |
| Mercury, total [as Hg] | monthly average | report only (mg/L) | all year |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year |
| Mercury, total [as Hg] | monthly average | report only (lb/d) | all year |
| Mercury, total [as Hg] | monthly average | report only (lb/d) | all year |
| Coliform, fecal general | monthly geometric mean | ≤ 200 #/100mL | all year |
| Coliform, fecal general | daily maximum | ≤ 400 #/100mL | all year |
| Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | 48-hour minimum | report only (pass=0;fail=1) | all year |
| Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | monthly average minimum | report only (pass=0;fail=1) | all year |
| LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | 48-hour minimum | report only (pass=0;fail=1) | all year |
| LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | monthly average minimum | report only (pass=0;fail=1) | all year |
| NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | 48-hour minimum | report only (%) | all year |
| NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | monthly average minimum | report only (%) | all year |
| NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | 48-hour minimum | report only (%) | all year |
| NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | monthly average minimum | report only (%) | all year |
| Coef Of Var Static Renewal 48Hr Acute D. pulex | maximum | report only (%) | all year |
| Coef Of Var Static Renewal 48Hr Acute Pimephales promelas | maximum | report only (%) | all year |
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/LA0120243 · MCP: https://passage-data.com/mcp