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Sewage treatment plant, Chama, New Mexico. NPDES permit NM0027731, in force until Feb 29, 2028. Last 12 months: over a limit 68 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Nitrogen, total [as N], 30-day average | 15.7 mg/L | ≤ 10 mg/L | 57% |
| October 2025 | Nitrogen, total [as N], daily maximum | 16.2 mg/L | ≤ 15 mg/L | 8% |
| October 2025 | Phosphorus, total [as P], 30-day average | 4.1 mg/L | ≤ 1 mg/L | 310% |
| October 2025 | Phosphorus, total [as P], daily maximum | 4.3 mg/L | ≤ 1.5 mg/L | 187% |
| November 2025 | pH, minimum | 6 SU | ≥ 6.6 SU | — |
| December 2025 | E. coli, daily maximum | 325.5 CFU/100mL | ≤ 235 CFU/100mL | 39% |
| December 2025 | Nitrogen, total [as N], 30-day average | 12.7 mg/L | ≤ 10 mg/L | 27% |
| January 2026 | Nitrogen, total [as N], 30-day average | 15.2 mg/L | ≤ 10 mg/L | 52% |
| January 2026 | Nitrogen, total [as N], daily maximum | 15.8 mg/L | ≤ 15 mg/L | 5% |
| February 2026 | Nitrogen, ammonia total [as N], 30-day average | 8.6 mg/L | ≤ 4.7 mg/L | 83% |
| February 2026 | Nitrogen, ammonia total [as N], daily maximum | 17 mg/L | ≤ 7.1 mg/L | 139% |
| February 2026 | Nitrogen, total [as N], 30-day average | 16.1 mg/L | ≤ 10 mg/L | 61% |
| February 2026 | Nitrogen, total [as N], daily maximum | 19 mg/L | ≤ 15 mg/L | 27% |
| March 2026 | BOD, 5-day, 20 deg. C, 30-day average | 67 mg/L | ≤ 30 mg/L | 123% |
| March 2026 | BOD, 5-day, 20 deg. C, 7-day average | 116 mg/L | ≤ 45 mg/L | 158% |
| March 2026 | E. coli, 30-day geometric mean | 4179.6 CFU/100mL | ≤ 126 CFU/100mL | 3217% |
| March 2026 | E. coli, daily maximum | 14517.6 CFU/100mL | ≤ 235 CFU/100mL | 6078% |
| March 2026 | E. coli, daily maximum | 15.6 BCFU/d | ≤ 1.43 BCFU/d | 991% |
| March 2026 | Nitrogen, ammonia total [as N], 30-day average | 22.7 mg/L | ≤ 10 mg/L | 127% |
| March 2026 | Nitrogen, ammonia total [as N], daily maximum | 24.6 mg/L | ≤ 15 mg/L | 64% |
| March 2026 | Nitrogen, total [as N], 30-day average | 33.8 mg/L | ≤ 10 mg/L | 238% |
| March 2026 | Nitrogen, total [as N], daily maximum | 37.2 mg/L | ≤ 15 mg/L | 148% |
| March 2026 | Phosphorus, total [as P], 30-day average | 3.5 mg/L | ≤ 1 mg/L | 250% |
| March 2026 | Phosphorus, total [as P], daily maximum | 6.9 mg/L | ≤ 1.5 mg/L | 360% |
| March 2026 | Solids, suspended percent removal, monthly average minimum | 24 % | ≥ 85 % | 407% |
| March 2026 | Solids, total suspended, 30-day average | 176.5 mg/L | ≤ 30 mg/L | 488% |
| March 2026 | Solids, total suspended, 7-day average | 253 mg/L | ≤ 45 mg/L | 462% |
| April 2026 | E. coli, 30-day geometric mean | 1646.1 CFU/100mL | ≤ 126 CFU/100mL | 1206% |
| April 2026 | E. coli, daily maximum | 2419.6 CFU/100mL | ≤ 235 CFU/100mL | 930% |
| April 2026 | Nitrogen, ammonia total [as N], 30-day average | 27.8 mg/L | ≤ 10 mg/L | 178% |
| April 2026 | Nitrogen, ammonia total [as N], daily maximum | 28.4 mg/L | ≤ 15 mg/L | 89% |
| April 2026 | Nitrogen, total [as N], 30-day average | 30.9 mg/L | ≤ 10 mg/L | 209% |
| April 2026 | Nitrogen, total [as N], daily maximum | 31.2 mg/L | ≤ 15 mg/L | 108% |
| April 2026 | Phosphorus, total [as P], 30-day average | 3.9 mg/L | ≤ 1 mg/L | 290% |
| April 2026 | Phosphorus, total [as P], daily maximum | 5.2 mg/L | ≤ 1.5 mg/L | 247% |
| April 2026 | Solids, suspended percent removal, monthly average minimum | 71 % | ≥ 85 % | 93% |
| April 2026 | Solids, total suspended, 30-day average | 37 mg/L | ≤ 30 mg/L | 23% |
| April 2026 | Solids, total suspended, 7-day average | 48 mg/L | ≤ 45 mg/L | 7% |
| May 2026 | E. coli, 30-day geometric mean | 994 CFU/100mL | ≤ 126 CFU/100mL | 689% |
| May 2026 | E. coli, daily maximum | 2419.6 CFU/100mL | ≤ 235 CFU/100mL | 930% |
| May 2026 | E. coli, daily maximum | 3.07 BCFU/d | ≤ 1.43 BCFU/d | 115% |
| May 2026 | Nitrogen, ammonia total [as N], 30-day average | 27.9 mg/L | ≤ 10 mg/L | 179% |
| May 2026 | Nitrogen, ammonia total [as N], daily maximum | 39.9 mg/L | ≤ 15 mg/L | 166% |
| May 2026 | Nitrogen, total [as N], 30-day average | 39 mg/L | ≤ 4 mg/L | 875% |
| May 2026 | Nitrogen, total [as N], daily maximum | 42.6 mg/L | ≤ 6 mg/L | 610% |
| May 2026 | Phosphorus, total [as P], 30-day average | 2.9 mg/L | ≤ .4 mg/L | 625% |
| May 2026 | Phosphorus, total [as P], daily maximum | 4.2 mg/L | ≤ .6 mg/L | 600% |
| May 2026 | Solids, total suspended, 30-day average | 37 mg/L | ≤ 30 mg/L | 23% |
| May 2026 | Solids, total suspended, 7-day average | 60 mg/L | ≤ 45 mg/L | 33% |
| June 2026 | BOD, 5-day, 20 deg. C, 30-day average | 58 mg/L | ≤ 30 mg/L | 93% |
| June 2026 | BOD, 5-day, 20 deg. C, 7-day average | 112 mg/L | ≤ 45 mg/L | 149% |
| June 2026 | E. coli, daily maximum | 4.27 BCFU/d | ≤ 1.43 BCFU/d | 199% |
| June 2026 | E. coli, daily maximum | > 2419.6 CFU/100mL | ≤ 235 CFU/100mL | — |
| June 2026 | Nitrogen, ammonia total [as N], 30-day average | 18.5 mg/L | ≤ 10 mg/L | 85% |
| June 2026 | Nitrogen, ammonia total [as N], daily maximum | 34.7 mg/L | ≤ 15 mg/L | 131% |
| June 2026 | Nitrogen, total [as N], 30-day average | 11.9 lb/d | ≤ 10 lb/d | 19% |
| June 2026 | Nitrogen, total [as N], 30-day average | 32 mg/L | ≤ 4 mg/L | 700% |
| June 2026 | Nitrogen, total [as N], daily maximum | 48.8 mg/L | ≤ 6 mg/L | 713% |
| June 2026 | Phosphorus, total [as P], 30-day average | 1.2 mg/L | ≤ .4 mg/L | 200% |
| June 2026 | Phosphorus, total [as P], daily maximum | 1.2 mg/L | ≤ .6 mg/L | 100% |
| June 2026 | Solids, total suspended, 30-day average | 55.5 mg/L | ≤ 30 mg/L | 85% |
| June 2026 | Solids, total suspended, 7-day average | 104 mg/L | ≤ 45 mg/L | 131% |
| June 2026 | pH, maximum | 8.9 SU | ≤ 8.8 SU | — |
| July 2026 | Nitrogen, total [as N], 30-day average | 16.8 mg/L | ≤ 4 mg/L | 320% |
| July 2026 | Nitrogen, total [as N], daily maximum | 17.2 mg/L | ≤ 6 mg/L | 187% |
| August 2026 | Nitrogen, total [as N], 30-day average | 21.6 mg/L | ≤ 4 mg/L | 440% |
| August 2026 | Nitrogen, total [as N], daily maximum | 23.3 mg/L | ≤ 6 mg/L | 288% |
| August 2026 | pH, minimum | 5.2 SU | ≥ 6.6 SU | — |
| 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 | 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 | 7-day average | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 81 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 81 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 122 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 122 lb/d | all year | 001 |
| pH | minimum | ≥ 6.6 SU | all year | 001 |
| pH | minimum | ≥ 6.6 SU | all year | 001 |
| pH | maximum | ≤ 8.8 SU | all year | 001 |
| pH | maximum | ≤ 8.8 SU | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | 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 | 7-day average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 81 lb/d | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 81 lb/d | all year | 001 |
| Solids, total suspended | 7-day average | ≤ 122 lb/d | all year | 001 |
| Solids, total suspended | 7-day average | ≤ 122 lb/d | all year | 001 |
| Nitrogen, total [as N] | 30-day average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | 30-day average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | 30-day average | ≤ 4 mg/L | May–Sep | 001 |
| Nitrogen, total [as N] | 30-day average | ≤ 4 mg/L | May–Sep | 001 |
| Nitrogen, total [as N] | 30-day average | ≤ 10 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Nitrogen, total [as N] | 30-day average | ≤ 10 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | ≤ 6 mg/L | May–Sep | 001 |
| Nitrogen, total [as N] | daily maximum | ≤ 6 mg/L | May–Sep | 001 |
| Nitrogen, total [as N] | daily maximum | ≤ 15 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Nitrogen, total [as N] | daily maximum | ≤ 15 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Nitrogen, total [as N] | 30-day average | report only (lb/d) | all year | 001 |
| Nitrogen, total [as N] | 30-day average | report only (lb/d) | all year | 001 |
| Nitrogen, total [as N] | 30-day average | ≤ 10 lb/d | May–Sep | 001 |
| Nitrogen, total [as N] | 30-day average | ≤ 10 lb/d | May–Sep | 001 |
| Nitrogen, total [as N] | 30-day average | ≤ 25 lb/d | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Nitrogen, total [as N] | 30-day average | ≤ 25 lb/d | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | May–Sep | 001 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | May–Sep | 001 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10 mg/L | Mar–Jun | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10 mg/L | Mar–Jun | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.7 mg/L | Jan, Feb, Jul, Aug, Sep, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.7 mg/L | Jan, Feb, Jul, Aug, Sep, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15 mg/L | Mar–Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15 mg/L | Mar–Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.1 mg/L | Jan, Feb, Jul, Aug, Sep, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.1 mg/L | Jan, Feb, Jul, Aug, Sep, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 27 lb/d | Mar–Jun | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 27 lb/d | Mar–Jun | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12.7 lb/d | Jan, Feb, Jul, Aug, Sep, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12.7 lb/d | Jan, Feb, Jul, Aug, Sep, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 40.5 lb/d | Mar–Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 40.5 lb/d | Mar–Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 19.1 lb/d | Jan, Feb, Jul, Aug, Sep, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 19.1 lb/d | Jan, Feb, Jul, Aug, Sep, Oct, Nov, Dec | 001 |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | 30-day average | ≤ 1 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Phosphorus, total [as P] | 30-day average | ≤ 1 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Phosphorus, total [as P] | 30-day average | ≤ .4 mg/L | May–Sep | 001 |
| Phosphorus, total [as P] | 30-day average | ≤ .4 mg/L | May–Sep | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | ≤ 1.5 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Phosphorus, total [as P] | daily maximum | ≤ 1.5 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Phosphorus, total [as P] | daily maximum | ≤ .6 mg/L | May–Sep | 001 |
| Phosphorus, total [as P] | daily maximum | ≤ .6 mg/L | May–Sep | 001 |
| Phosphorus, total [as P] | 30-day average | report only (lb/d) | all year | 001 |
| Phosphorus, total [as P] | 30-day average | report only (lb/d) | all year | 001 |
| Phosphorus, total [as P] | 30-day average | ≤ 2.5 lb/d | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Phosphorus, total [as P] | 30-day average | ≤ 2.5 lb/d | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Phosphorus, total [as P] | 30-day average | ≤ 1 lb/d | May–Sep | 001 |
| Phosphorus, total [as P] | 30-day average | ≤ 1 lb/d | May–Sep | 001 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | May–Sep | 001 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | May–Sep | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | 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 |
| Flow, in conduit or thru treatment plant | 7-day average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | instantaneous maximum | ≤ 11 ug/L | 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 | 30-day geometric mean | ≤ 126 CFU/100mL | all year | 001 |
| E. coli | daily maximum | ≤ 235 CFU/100mL | all year | 001 |
| E. coli | daily maximum | ≤ 235 CFU/100mL | all year | 001 |
| E. coli | daily maximum | ≤ 1.43 BCFU/d | all year | 001 |
| E. coli | daily maximum | ≤ 1.43 BCFU/d | all year | 001 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | 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 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| 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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Your permit document is the final word. As JSON: /api/v1/permits/NM0027731 · MCP: https://passage-data.com/mcp