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Sewage treatment plant, major discharger, Rio Rancho, New Mexico. NPDES permit NM0027987 expired Jul 31, 2026; its limits still apply. Last 12 months: over a limit 14 times (last September 2026), 3 of 58 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| October 2025 | 001 | E. coli, daily maximum | 98 MPN/100mL | ≤ 88 CFU/100mL | 11% |
| December 2025 | 001 | E. coli, daily maximum | 133 MPN/100mL | ≤ 88 CFU/100mL | 51% |
| January 2026 | 001 | E. coli, daily maximum | 122 MPN/100mL | ≤ 88 CFU/100mL | 39% |
| February 2026 | 001 | E. coli, daily maximum | 1267 MPN/100mL | ≤ 88 CFU/100mL | 1340% |
| February 2026 | 001 | Nitrogen, ammonia total [as N], daily maximum | 2.81 mg/L | ≤ 2.14 mg/L | 31% |
| February 2026 | 001 | Solids, total suspended, 30-day average | 16 mg/L | ≤ 15 mg/L | 7% |
| February 2026 | 001 | Solids, total suspended, 7-day average | 24 mg/L | ≤ 23 mg/L | 4% |
| March 2026 | 001 | E. coli, daily maximum | 89 MPN/100mL | ≤ 88 CFU/100mL | 1% |
| April 2026 | 001 | E. coli, daily maximum | 92 MPN/100mL | ≤ 88 CFU/100mL | 5% |
| April 2026 | 601 | Chlorine, total residual, instantaneous maximum | 134 ug/L | ≤ 11 ug/L | 1118% |
| May 2026 | 001 | E. coli, daily maximum | 143 MPN/100mL | ≤ 88 CFU/100mL | 63% |
| July 2026 | 001 | E. coli, daily maximum | 403 MPN/100mL | ≤ 88 CFU/100mL | 358% |
| August 2026 | 001 | E. coli, daily maximum | 102 MPN/100mL | ≤ 88 CFU/100mL | 16% |
| September 2026 | 001 | E. coli, daily maximum | 174 MPN/100mL | ≤ 88 CFU/100mL | 98% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 10 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 15 mg/L | all year | 001 |
| pH | minimum | ≥ 6.6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 15 mg/L | all year | 001 |
| Solids, total suspended | 7-day average | ≤ 23 mg/L | all year | 001 |
| Oil & Grease | 30-day average | ≤ 10 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.14 mg/L | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 001 |
| Chlorpyrifos | daily maximum | report only (mg/L) | all year | 001 |
| Benzidine | daily maximum | report only (mg/L) | all year | 001 |
| Polychlorinated biphenyls [PCBs] | daily maximum | report only (mg/L) | all year | 001 |
| Parathion | daily maximum | report only (mg/L) | all year | 001 |
| Diazinon | daily maximum | report only (mg/L) | all year | 001 |
| Guthion | daily maximum | report only (mg/L) | all year | 001 |
| Hexachlorobenzene | daily maximum | report only (mg/L) | all year | 001 |
| Mirex | 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 | ≤ 47 CFU/100mL | all year | 001 |
| E. coli | daily maximum | ≤ 88 CFU/100mL | all year | 001 |
| Solids, total dissolved | 30-day average | ≤ 1322 mg/L | all year | 001 |
| Solids, total dissolved | daily maximum | ≤ 1983 mg/L | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year | 001 |
| Alpha gross radioactivity | daily maximum | report only (pCi/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 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 10 mg/L | all year | 601 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 15 mg/L | all year | 601 |
| pH | minimum | ≥ 6.6 SU | all year | 601 |
| pH | maximum | ≤ 9 SU | all year | 601 |
| Solids, total suspended | 30-day average | ≤ 15 mg/L | all year | 601 |
| Solids, total suspended | 7-day average | ≤ 23 mg/L | all year | 601 |
| Oil & Grease | 30-day average | ≤ 10 mg/L | all year | 601 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 601 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 601 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.14 mg/L | all year | 601 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 601 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 601 |
| Polychlorinated biphenyls [PCBs] | daily maximum | report only (mg/L) | all year | 601 |
| Hexachlorobenzene | daily maximum | report only (mg/L) | all year | 601 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 601 |
| Flow, in conduit or thru treatment plant | 7-day average | report only (MGD) | all year | 601 |
| Chlorine, total residual | instantaneous maximum | ≤ 11 ug/L | all year | 601 |
| E. coli | 30-day geometric mean | ≤ 47 CFU/100mL | all year | 601 |
| E. coli | daily maximum | ≤ 88 CFU/100mL | all year | 601 |
| Solids, total dissolved | 30-day average | ≤ 1322 mg/L | all year | 601 |
| Solids, total dissolved | daily maximum | ≤ 1983 mg/L | all year | 601 |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year | 601 |
| Alpha gross radioactivity | daily maximum | report only (pCi/L) | all year | 601 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 601 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 601 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 684 lb/d | all year | CC0 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 1026 lb/d | all year | CC0 |
| Solids, total suspended | 30-day average | ≤ 1026 lb/d | all year | CC0 |
| Solids, total suspended | 7-day average | ≤ 1573 lb/d | all year | CC0 |
| Oil & Grease | 30-day average | ≤ 684 lb/d | all year | CC0 |
| Oil & Grease | daily maximum | ≤ 1026 lb/d | all year | CC0 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 146 lb/d | all year | CC0 |
| E. coli | 30-day geometric mean | ≤ 9800 MCFU/d | all year | CC0 |
| Solids, total dissolved | 30-day average | ≤ 90409 lb/d | all year | CC0 |
| Solids, total dissolved | daily maximum | ≤ 135613 lb/d | all year | CC0 |
| Whole effluent toxicity - retest #1 | value | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #2 | value | report only (pass=0;fail=1) | all year | TX1 |
| WET, sublethal retest #1 | value | report only (pass=0;fail=1) | all year | TX1 |
| WET, sublethal retest #2 | value | report only (pass=0;fail=1) | all year | TX1 |
| Whole Effluent Toxicity - Retest #3 | value | report only (pass=0;fail=1) | all year | TX1 |
| Whole Effluent Toxicity, Sub-Lethal Retest #3 | value | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | value | report only (pass=0;fail=1) | all year | TX1 |
| LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | value | report only (pass=0;fail=1) | all year | TX1 |
| NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | value | report only (%) | all year | TX1 |
| NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | value | report only (%) | all year | TX1 |
| Coef Of Var Static Renewal 48Hr Acute D. pulex | value | report only (%) | all year | TX1 |
| Coef Of Var Static Renewal 48Hr Acute Pimephales promelas | value | report only (%) | all year | TX1 |
| Whole effluent toxicity - retest #1 | value | report only (pass=0;fail=1) | all year | TX6 |
| Whole effluent toxicity - retest #2 | value | report only (pass=0;fail=1) | all year | TX6 |
| WET, sublethal retest #1 | value | report only (pass=0;fail=1) | all year | TX6 |
| WET, sublethal retest #2 | value | report only (pass=0;fail=1) | all year | TX6 |
| Whole Effluent Toxicity - Retest #3 | value | report only (pass=0;fail=1) | all year | TX6 |
| Whole Effluent Toxicity, Sub-Lethal Retest #3 | value | report only (pass=0;fail=1) | all year | TX6 |
| Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | value | report only (pass=0;fail=1) | all year | TX6 |
| LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | value | report only (pass=0;fail=1) | all year | TX6 |
| NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | value | report only (%) | all year | TX6 |
| NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | value | report only (%) | all year | TX6 |
| Coef Of Var Static Renewal 48Hr Acute D. pulex | value | report only (%) | all year | TX6 |
| Coef Of Var Static Renewal 48Hr Acute Pimephales promelas | value | report only (%) | all year | TX6 |
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/NM0027987 · MCP: https://passage-data.com/mcp