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Sewage treatment plant, Mansfield, Louisiana. NPDES permit LA0066702, in force until Jan 31, 2029. Last 12 months: over a limit 18 times (last June 2026), 4 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| October 2025 | 003 | Nitrogen, ammonia total [as N], monthly average | 7.37 mg/L | ≤ 4.9 mg/L | 50% |
| October 2025 | 302 | Nitrogen, ammonia total [as N], daily maximum | 10.5 mg/L | ≤ 10 mg/L | 5% |
| October 2025 | 302 | Nitrogen, ammonia total [as N], monthly average | 6.82 mg/L | ≤ 4.9 mg/L | 39% |
| November 2025 | 302 | Nitrogen, ammonia total [as N], daily maximum | 10.4 mg/L | ≤ 10 mg/L | 4% |
| January 2026 | 002 | Solids, total suspended, monthly average | 40 mg/L | ≤ 27 mg/L | 48% |
| January 2026 | 003 | Nitrogen, ammonia total [as N], monthly average | 5.03 mg/L | ≤ 4.9 mg/L | 3% |
| February 2026 | 002 | Solids, total suspended, monthly average | 47.2 mg/L | ≤ 27 mg/L | 75% |
| February 2026 | 003 | Nitrogen, ammonia total [as N], monthly average | 6.63 mg/L | ≤ 4.9 mg/L | 35% |
| February 2026 | 302 | Nitrogen, ammonia total [as N], monthly average | 5.32 mg/L | ≤ 4.9 mg/L | 9% |
| March 2026 | 003 | Cyanide, total [as CN], daily maximum | .0321 mg/L | ≤ .011 mg/L | 192% |
| March 2026 | 003 | Cyanide, total [as CN], monthly average | .0124 mg/L | ≤ .0045 mg/L | 176% |
| March 2026 | 003 | Nitrogen, ammonia total [as N], daily maximum | 36.7 mg/L | ≤ 10 mg/L | 267% |
| March 2026 | 003 | Nitrogen, ammonia total [as N], monthly average | 22.75 mg/L | ≤ 4.9 mg/L | 364% |
| March 2026 | 003 | Solids, total suspended, monthly average | 40.5 mg/L | ≤ 27 mg/L | 50% |
| May 2026 | 002 | Solids, total suspended, monthly average | 30.8 mg/L | ≤ 27 mg/L | 14% |
| May 2026 | 003 | Nitrogen, ammonia total [as N], daily maximum | 32.9 mg/L | ≤ 10 mg/L | 229% |
| May 2026 | 003 | Nitrogen, ammonia total [as N], monthly average | 32.9 mg/L | ≤ 4.9 mg/L | 571% |
| June 2026 | 003 | Solids, total suspended, monthly average | 62.4 mg/L | ≤ 27 mg/L | 131% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Turbidity | daily maximum | ≤ 50 NTU | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 37 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 140 mg/L | all year | 002 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 002 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 27 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 88 mg/L | all year | 002 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 002 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4.9 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10 mg/L | all year | 002 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 002 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 50 mg/L | all year | 002 |
| Cyanide, total [as CN] | monthly average | ≤ .0061 mg/L | all year | 002 |
| Cyanide, total [as CN] | daily maximum | ≤ .015 mg/L | all year | 002 |
| Zinc, total [as Zn] | monthly average | ≤ .11 mg/L | all year | 002 |
| Zinc, total [as Zn] | daily maximum | ≤ .2 mg/L | all year | 002 |
| Phenol | monthly average | ≤ .015 mg/L | all year | 002 |
| Phenol | daily maximum | ≤ .026 mg/L | 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 | daily maximum | report only (MGD) | all year | 002 |
| .alpha.-Terpineol | monthly average | ≤ .016 mg/L | all year | 002 |
| .alpha.-Terpineol | daily maximum | ≤ .033 mg/L | all year | 002 |
| Mercury, total [as Hg] | monthly average | report only (mg/L) | all year | 002 |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year | 002 |
| p-Cresol | monthly average | ≤ .014 mg/L | all year | 002 |
| p-Cresol | daily maximum | ≤ .025 mg/L | all year | 002 |
| Benzoic acids, total | monthly average | ≤ .071 mg/L | all year | 002 |
| Benzoic acids, total | daily maximum | ≤ .12 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 37 mg/L | all year | 003 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 140 mg/L | all year | 003 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 003 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | monthly average | ≤ 27 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 88 mg/L | all year | 003 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 003 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 003 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4.9 mg/L | all year | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10 mg/L | all year | 003 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 003 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 003 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 50 mg/L | all year | 003 |
| Cyanide, total [as CN] | monthly average | ≤ .0045 mg/L | all year | 003 |
| Cyanide, total [as CN] | daily maximum | ≤ .011 mg/L | all year | 003 |
| Sulfate, total [as SO4] | monthly average | ≤ 221 mg/L | all year | 003 |
| Sulfate, total [as SO4] | daily maximum | ≤ 521 mg/L | all year | 003 |
| Zinc, total [as Zn] | monthly average | ≤ .11 mg/L | all year | 003 |
| Zinc, total [as Zn] | daily maximum | ≤ .2 mg/L | all year | 003 |
| Phenol | monthly average | ≤ .015 mg/L | all year | 003 |
| Phenol | daily maximum | ≤ .026 mg/L | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| .alpha.-Terpineol | monthly average | ≤ .016 mg/L | all year | 003 |
| .alpha.-Terpineol | daily maximum | ≤ .033 mg/L | all year | 003 |
| Solids, total dissolved | monthly average | ≤ 1476 mg/L | all year | 003 |
| Solids, total dissolved | daily maximum | ≤ 3512 mg/L | all year | 003 |
| Mercury, total [as Hg] | monthly average | report only (mg/L) | all year | 003 |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year | 003 |
| p-Cresol | monthly average | ≤ .014 mg/L | all year | 003 |
| p-Cresol | daily maximum | ≤ .025 mg/L | all year | 003 |
| Benzoic acids, total | monthly average | ≤ .071 mg/L | all year | 003 |
| Benzoic acids, total | daily maximum | ≤ .12 mg/L | all year | 003 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 006 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 006 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 006 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 006 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 50 mg/L | all year | 006 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 006 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 37 mg/L | all year | 302 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 140 mg/L | all year | 302 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 302 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 302 |
| Solids, total suspended | monthly average | ≤ 27 mg/L | all year | 302 |
| Solids, total suspended | daily maximum | ≤ 88 mg/L | all year | 302 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 302 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4.9 mg/L | all year | 302 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10 mg/L | all year | 302 |
| Chloride [as Cl] | monthly average | report only (mg/L) | all year | 302 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 302 |
| Zinc, total [as Zn] | monthly average | ≤ .11 mg/L | all year | 302 |
| Zinc, total [as Zn] | daily maximum | ≤ .2 mg/L | all year | 302 |
| Acenaphthylene | daily maximum | ≤ .01 mg/L | all year | 302 |
| Acenaphthene | daily maximum | ≤ .01 mg/L | all year | 302 |
| Benzo[b]fluoranthene | daily maximum | ≤ .01 mg/L | all year | 302 |
| Benzo[k]fluoranthene | daily maximum | ≤ .005 mg/L | all year | 302 |
| Benzo[a]pyrene | daily maximum | ≤ .005 mg/L | all year | 302 |
| Chrysene | daily maximum | ≤ .005 mg/L | all year | 302 |
| Fluoranthene | daily maximum | ≤ .01 mg/L | all year | 302 |
| Fluorene | daily maximum | ≤ .01 mg/L | all year | 302 |
| Indeno[1,2,3-cd]pyrene | daily maximum | ≤ .01 mg/L | all year | 302 |
| Phenanthrene | daily maximum | ≤ .01 mg/L | all year | 302 |
| Pyrene | daily maximum | ≤ .01 mg/L | all year | 302 |
| Benzo[ghi]perylene | daily maximum | ≤ .02 mg/L | all year | 302 |
| Benzo[a]anthracene | daily maximum | ≤ .005 mg/L | all year | 302 |
| Dibenz[a,h]anthracene | daily maximum | ≤ .005 mg/L | all year | 302 |
| Phenol | monthly average | ≤ .015 mg/L | all year | 302 |
| Phenol | daily maximum | ≤ .026 mg/L | all year | 302 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 302 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 302 |
| .alpha.-Terpineol | monthly average | ≤ .016 mg/L | all year | 302 |
| .alpha.-Terpineol | daily maximum | ≤ .033 mg/L | all year | 302 |
| Priority pollutants scan [yes/no] | minimum | ≥ 1 N=0;Y=1 | all year | 302 |
| p-Cresol | monthly average | ≤ .014 mg/L | all year | 302 |
| p-Cresol | daily maximum | ≤ .025 mg/L | all year | 302 |
| Benzoic acids, total | monthly average | ≤ .071 mg/L | all year | 302 |
| Benzoic acids, total | daily maximum | ≤ .12 mg/L | all year | 302 |
| 2-Methylnaphthalene | daily maximum | ≤ .01 mg/L | all year | 302 |
| Chemical Oxygen Demand [COD] | monthly average | ≤ 200 mg/L | all year | 302 |
| Chemical Oxygen Demand [COD] | daily maximum | ≤ 300 mg/L | all year | 302 |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Cyanide, total [as CN], daily maximum outfall 002 | 0.011 mg/L | tighter | — | — |
| Cyanide, total [as CN], monthly average outfall 002 | 0.0047 mg/L | tighter | — | — |
| Mercury, total [as Hg], daily maximum outfall 002 | 0.00008 mg/L | new | — | — |
| Mercury, total [as Hg], monthly average outfall 002 | 0.00003 mg/L | new | — | — |
| Mercury, total [as Hg], daily maximum outfall 003 | 0.00008 mg/L | new | — | — |
| Mercury, total [as Hg], monthly average outfall 003 | 0.00003 mg/L | new | — | — |
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/LA0066702 · MCP: https://passage-data.com/mcp