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Alkalies And Chlorine, major discharger, St. Gabriel, Louisiana. NPDES permit LA0005231 expired Jun 30, 2024; its limits still apply. Last 12 months: over a limit 3 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| December 2025 | 101 | Solids, total suspended, monthly average | 33.6 mg/L | ≤ 30 mg/L | 12% |
| August 2026 | 001 | Solids, total suspended, daily maximum | 5138.2 lb/d | ≤ 1727 lb/d | 198% |
| August 2026 | 002 | Mercury, total [as Hg], daily maximum | 34.4 ug/L | ≤ 32 ug/L | 8% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | instantaneous minimum | report only (SU) | all year | 001 |
| pH | instantaneous maximum | report only (SU) | all year | 001 |
| Solids, total suspended | monthly average | ≤ 802 lb/d | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 1727 lb/d | all year | 001 |
| Oil & Grease | daily maximum | ≤ 265 lb/d | all year | 001 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 50 mg/L | all year | 001 |
| Chloride [as Cl] | monthly average | report only (mg/L) | all year | 001 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | monthly average | report only (lb/d) | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (lb/d) | all year | 001 |
| Lead, total [as Pb] | monthly average | ≤ 2.98 lb/d | all year | 001 |
| Lead, total [as Pb] | daily maximum | ≤ 7.36 lb/d | all year | 001 |
| Nickel, total [as Ni] | monthly average | ≤ 5.79 lb/d | all year | 001 |
| Nickel, total [as Ni] | daily maximum | ≤ 15.19 lb/d | all year | 001 |
| Whole effluent toxicity - retest #1 | 48-hour minimum | report only (pass=0;fail=1) | all year | 001 |
| Whole effluent toxicity - retest #1 | 48-hour minimum | report only (pass=0;fail=1) | all year | 001 |
| Whole effluent toxicity - retest #1 | monthly average minimum | report only (pass=0;fail=1) | all year | 001 |
| Whole effluent toxicity - retest #1 | monthly average minimum | report only (pass=0;fail=1) | all year | 001 |
| Whole effluent toxicity - retest #2 | 48-hour minimum | report only (pass=0;fail=1) | all year | 001 |
| Whole effluent toxicity - retest #2 | 48-hour minimum | report only (pass=0;fail=1) | all year | 001 |
| Whole effluent toxicity - retest #2 | monthly average minimum | report only (pass=0;fail=1) | all year | 001 |
| Whole effluent toxicity - retest #2 | monthly average minimum | report only (pass=0;fail=1) | 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 | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | monthly average | ≤ 12.4 lb/d | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ 20.4 lb/d | all year | 001 |
| Whole Effluent Toxicity - Retest #3 | 48-hour minimum | report only (pass=0;fail=1) | all year | 001 |
| Whole Effluent Toxicity - Retest #3 | 48-hour minimum | report only (pass=0;fail=1) | all year | 001 |
| Whole Effluent Toxicity - Retest #3 | monthly average minimum | report only (pass=0;fail=1) | all year | 001 |
| Whole Effluent Toxicity - Retest #3 | monthly average minimum | report only (pass=0;fail=1) | all year | 001 |
| Mercury, total [as Hg] | monthly average | ≤ .11 lb/d | all year | 001 |
| Mercury, total [as Hg] | daily maximum | ≤ .25 lb/d | all year | 001 |
| pH range excursions, > 60 minutes | monthly total | ≤ 0 occur/mo | all year | 001 |
| pH range excursions, monthly total accum | monthly total | ≤ 446 min | all year | 001 |
| Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | 48-hour minimum | report only (pass=0;fail=1) | all year | 001 |
| Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | monthly average minimum | report only (pass=0;fail=1) | all year | 001 |
| LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | 48-hour minimum | report only (pass=0;fail=1) | all year | 001 |
| LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | monthly average minimum | report only (pass=0;fail=1) | all year | 001 |
| NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | 48-hour minimum | report only (%) | all year | 001 |
| NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | monthly average minimum | report only (%) | all year | 001 |
| NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | 48-hour minimum | report only (%) | all year | 001 |
| NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | monthly average minimum | report only (%) | all year | 001 |
| Coef Of Var Static Renewal 48Hr Acute D. pulex | maximum | report only (%) | all year | 001 |
| Coef Of Var Static Renewal 48Hr Acute Pimephales promelas | maximum | report only (%) | all year | 001 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 002 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 002 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 002 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 35 mg/L | all year | 002 |
| Copper, total [as Cu] | monthly average | report only (mg/L) | all year | 002 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 002 |
| Zinc, total [as Zn] | monthly average | report only (mg/L) | all year | 002 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 002 |
| Aluminum, total [as Al] | monthly average | report only (mg/L) | all year | 002 |
| Aluminum, total [as Al] | daily maximum | report only (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 |
| Mercury, total [as Hg] | daily maximum | ≤ 32 ug/L | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 101 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 45 mg/L | all year | 101 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 101 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 101 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 101 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 101 |
| Coliform, fecal general | monthly geometric mean | ≤ 200 #/100mL | all year | 101 |
| Coliform, fecal general | daily maximum | ≤ 400 #/100mL | all year | 101 |
Cited limits by parameter: Louisiana's rules and the federal ones.
Same industry: the 130 Chemicals and Allied Products permits in Louisiana.
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Your permit document is the final word. As JSON: /api/v1/permits/LA0005231 · MCP: https://passage-data.com/mcp