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Sewage treatment plant, Baggs, Wyoming. NPDES permit WY0022888, in force until Jan 31, 2031. Last 12 months: over a limit 14 times (last September 2026), 128 required values missing, 15 of 25 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | pH, instantaneous maximum | 9.98 SU | ≤ 9 SU | — |
| November 2025 | pH, instantaneous maximum | 9.27 SU | ≤ 9 SU | — |
| December 2025 | Chlorine, total residual, daily maximum | .28 mg/L | ≤ .019 mg/L | 1374% |
| December 2025 | Chlorine, total residual, daily maximum | .28 mg/L | ≤ .019 mg/L | 1374% |
| December 2025 | pH, instantaneous maximum | 9.29 SU | ≤ 9 SU | — |
| January 2026 | Chlorine, total residual, daily maximum | .2 mg/L | ≤ .019 mg/L | 953% |
| January 2026 | pH, instantaneous maximum | 10.11 SU | ≤ 9 SU | — |
| February 2026 | Chlorine, total residual, daily maximum | .23 mg/L | ≤ .019 mg/L | 1111% |
| March 2026 | Chlorine, total residual, daily maximum | .29 mg/L | ≤ .019 mg/L | 1426% |
| May 2026 | Chlorine, total residual, daily maximum | .29 mg/L | ≤ .019 mg/L | 1426% |
| June 2026 | Chlorine, total residual, daily maximum | .13 mg/L | ≤ .019 mg/L | 584% |
| July 2026 | Chlorine, total residual, daily maximum | .15 mg/L | ≤ .019 mg/L | 689% |
| August 2026 | Chlorine, total residual, daily maximum | .24 mg/L | ≤ .019 mg/L | 1163% |
| September 2026 | Chlorine, total residual, daily maximum | .05 mg/L | ≤ .019 mg/L | 163% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 001 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 001 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | weekly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | ≤ 100 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 150 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 11.53 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 8.98 mg/L | May–Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 27.09 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 48.12 mg/L | May–Sep | 001 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Duration | monthly total | report only (d) | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .019 mg/L | all year | 001 |
| E. coli | monthly geometric mean | ≤ 630 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| E. coli | monthly geometric mean | ≤ 126 #/100mL | May–Sep | 001 |
| E. coli | daily maximum | ≤ 630 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| E. coli | daily maximum | ≤ 576 #/100mL | May–Sep | 001 |
| Phosphorus, Total | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total dissolved | monthly average | report only (mg/L) | all year | 001 |
| Solids, total dissolved | monthly average | report only (mg/L) | all year | 001 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total dissolved | monthly average | report only (mg/L) | all year | 001 |
| Solids, total dissolved | monthly average | report only (ton/d) | all year | 001 |
| Flow | monthly average | ≤ .17 MGD | all year | 001 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 65 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 65 % | all year | 001 |
| Produced water, oil and grease | daily maximum | report only (mg/L) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | DMP1 |
| pH | instantaneous minimum | report only (SU) | all year | DMP1 |
| pH | instantaneous maximum | report only (SU) | all year | DMP1 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | DMP1 |
| Flow | daily maximum | report only (MGD) | all year | DMP1 |
Cited limits by parameter: Wyoming's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
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