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Sewage treatment plant, major discharger, Las Cruces, New Mexico. NPDES permit NM0023311 expired Jun 30, 2026; its limits still apply. Last 12 months: over a limit 3 times (last December 2025). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Whole Effluent Toxicity [WET] - C. dubia, minimum value | 53 % | ≥ 95 % | 44% |
| December 2025 | Whole Effluent Toxicity [WET] - C. dubia, minimum value | 53 % | ≥ 95 % | 44% |
| December 2025 | Whole Effluent Toxicity [WET] - C. dubia, minimum value | 83 % | ≥ 95 % | 13% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 3379 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 5069 lb/d | all year | 001 |
| pH | minimum | ≥ 6.6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 3379 lb/d | all year | 001 |
| Solids, total suspended | 7-day average | ≤ 5069 lb/d | all year | 001 |
| Acrolein | daily maximum | report only (mg/L) | all year | 001 |
| Acrylonitrile | daily maximum | report only (mg/L) | all year | 001 |
| Benzo[k]fluoranthene | daily maximum | report only (mg/L) | all year | 001 |
| Benzo[a]pyrene | daily maximum | report only (mg/L) | all year | 001 |
| Chrysene | daily maximum | report only (mg/L) | all year | 001 |
| 1,2-Diphenylhydrazine | daily maximum | report only (mg/L) | all year | 001 |
| Indeno[1,2,3-cd]pyrene | daily maximum | report only (mg/L) | all year | 001 |
| Benzo[a]anthracene | daily maximum | report only (mg/L) | all year | 001 |
| Dibenzo[a,h]anthracene, dry weight | daily maximum | report only (mg/L) | all year | 001 |
| Benzidine | daily maximum | report only (mg/L) | all year | 001 |
| Endrin | daily maximum | report only (mg/L) | all year | 001 |
| Heptachlor | daily maximum | report only (mg/L) | all year | 001 |
| Polychlorinated biphenyls [PCBs] | 30-day average | ≤ .00064 ug/L | all year | 001 |
| Polychlorinated biphenyls [PCBs] | 30-day average | ≤ .00064 ug/L | all year | 001 |
| Polychlorinated biphenyls [PCBs] | daily maximum | ≤ .0006711 ug/L | all year | 001 |
| Polychlorinated biphenyls [PCBs] | daily maximum | ≤ .0006711 ug/L | all year | 001 |
| Polychlorinated biphenyls [PCBs] | 30-day average | report only (lb/d) | all year | 001 |
| Polychlorinated biphenyls [PCBs] | 30-day average | ≤ .00007205 lb/d | all year | 001 |
| Polychlorinated biphenyls [PCBs] | daily maximum | report only (lb/d) | all year | 001 |
| Polychlorinated biphenyls [PCBs] | daily maximum | ≤ .00007556 lb/d | all year | 001 |
| Diazinon | daily maximum | report only (mg/L) | all year | 001 |
| Hexachlorobenzene | daily maximum | report only (mg/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | 7-day average | report only (MGD) | all year | 001 |
| Chlorine, total residual | instantaneous maximum | ≤ 11 ug/L | all year | 001 |
| E. coli | 30-day geometric mean | ≤ 126 CFU/100mL | all year | 001 |
| E. coli | daily maximum | ≤ 410 CFU/100mL | all year | 001 |
| E. coli | 30-day geometric mean | ≤ 42.5 BCFU/d | all year | 001 |
| 3,4-Benzofluoranthene | daily maximum | report only (mg/L) | all year | 001 |
| Methylmercury | daily maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Whole Effluent Toxicity [WET] - C. dubia | minimum value | ≥ 95 % | all year | TX1 |
| Whole Effluent Toxicity [WET] - C. dubia | minimum value | ≥ 95 % | all year | TX1 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | value | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | value | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | value | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | value | report only (pass=0;fail=1) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | value | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | value | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | value | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | value | report only (%) | all year | TX1 |
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | value | report only (%) | all year | TX1 |
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | value | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia | value | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas | value | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | value | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas | value | report only (%) | all year | TX1 |
Cited limits by parameter: New Mexico'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/NM0023311 · MCP: https://passage-data.com/mcp