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Sewage treatment plant, Stansbury Park, Utah. NPDES permit UT0025241, in force until Apr 30, 2028. Last 12 months: over a limit 19 times (last May 2026), 6 of 30 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| November 2025 | 001 | Nitrogen, ammonia total [as N], maximum monthly average | 3.49 mg/L | ≤ 2.7 mg/L | 29% |
| December 2025 | 002 | E. coli, 30-day geometric mean | 448 #/100mL | ≤ 126 #/100mL | 256% |
| December 2025 | 002 | E. coli, 7-day geometric mean | 2400 #/100mL | ≤ 158 #/100mL | 1419% |
| December 2025 | 002 | Nitrogen, ammonia total [as N], daily maximum | 34.8 mg/L | ≤ 8.2 mg/L | 324% |
| December 2025 | 002 | Nitrogen, ammonia total [as N], maximum monthly average | 27.34 mg/L | ≤ 2.7 mg/L | 913% |
| February 2026 | 002 | Chlorine, total residual, maximum monthly average | .47 mg/L | ≤ .43 mg/L | 9% |
| February 2026 | 002 | E. coli, 7-day geometric mean | 172 #/100mL | ≤ 158 #/100mL | 9% |
| February 2026 | 002 | Nitrogen, ammonia total [as N], daily maximum | 31.2 mg/L | ≤ 9.8 mg/L | 218% |
| February 2026 | 002 | Nitrogen, ammonia total [as N], maximum monthly average | 28.2 mg/L | ≤ 3.4 mg/L | 729% |
| February 2026 | 002 | pH, daily minimum | 6 SU | ≥ 6.5 SU | — |
| March 2026 | 001 | E. coli, 7-day geometric mean | 167 #/100mL | ≤ 158 #/100mL | 6% |
| March 2026 | 001 | Nitrogen, ammonia total [as N], daily maximum | 10.3 mg/L | ≤ 9.8 mg/L | 5% |
| March 2026 | 001 | Nitrogen, ammonia total [as N], maximum monthly average | 4.68 mg/L | ≤ 3.4 mg/L | 38% |
| March 2026 | 001 | Solids, suspended percent removal, minimum | 47.11 % | ≥ 65 % | 51% |
| March 2026 | 001 | Solids, total suspended, maximum weekly average | 93 mg/L | ≤ 65 mg/L | 43% |
| April 2026 | 001 | Nitrogen, ammonia total [as N], daily maximum | 22 mg/L | ≤ 8.2 mg/L | 168% |
| April 2026 | 001 | Nitrogen, ammonia total [as N], maximum monthly average | 13.53 mg/L | ≤ 2.7 mg/L | 401% |
| May 2026 | 001 | Nitrogen, ammonia total [as N], daily maximum | 26.9 mg/L | ≤ 8.2 mg/L | 228% |
| May 2026 | 001 | Nitrogen, ammonia total [as N], maximum monthly average | 20.175 mg/L | ≤ 2.7 mg/L | 647% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | 30-day average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 65 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year | 001 |
| pH | daily minimum | ≥ 6.5 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | maximum monthly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | maximum weekly average | ≤ 65 mg/L | all year | 001 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 1 mg/L | Jul–Sep | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 2.7 mg/L | Oct–Dec | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 3.4 mg/L | Jan–Mar | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 2.7 mg/L | Apr–Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.7 mg/L | Jul–Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.2 mg/L | Oct–Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.8 mg/L | Jan–Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.2 mg/L | Apr–Jun | 001 |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | maximum monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | annual average | ≤ 8966 lb/yr | all year | 001 |
| Phosphorus, total [as P] | maximum monthly average | report only (mg/L) | all year | 001 |
| Cyanide, total [as CN] | 6-month average | report only (mg/L) | all year | 001 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year | 001 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year | 001 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | 001 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 001 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 001 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 001 |
| Molybdenum, total [as Mo] | daily maximum | report only (mg/L) | all year | 001 |
| Molybdenum, total [as Mo] | daily maximum | report only (mg/L) | all year | 001 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 001 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 001 |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | 001 |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 001 |
| Selenium, total [as Se] | 6-month average | report only (mg/L) | all year | 001 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 001 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | maximum monthly average | ≤ 1.5 MGD | all year | 001 |
| Chlorine, total residual | maximum monthly average | ≤ .43 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .73 mg/L | all year | 001 |
| Phosphorus, ortho | 30-day average | report only (mg/L) | all year | 001 |
| E. coli | 30-day geometric mean | ≤ 126 #/100mL | all year | 001 |
| E. coli | 7-day geometric mean | ≤ 158 #/100mL | all year | 001 |
| Solids, total dissolved [TDS] | 30-day average | report only (mg/L) | all year | 001 |
| Nitrogen, nitrate total [as NO3] | 30-day average | report only (mg/L) | all year | 001 |
| Nitrogen, nitrite total [as NO2] | 30-day average | report only (mg/L) | all year | 001 |
| Mercury, total [as Hg] | 6-month average | report only (mg/L) | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, percent removal | minimum % removal | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | minimum | ≥ 65 % | all year | 001 |
| Oxygen, dissolved [DO] | 30-day average | report only (mg/L) | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 45 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 65 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year | 002 |
| pH | daily minimum | ≥ 6.5 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | maximum monthly average | ≤ 45 mg/L | all year | 002 |
| Solids, total suspended | maximum weekly average | ≤ 65 mg/L | all year | 002 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 1 mg/L | Jul–Sep | 002 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 2.7 mg/L | Oct–Dec | 002 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 3.4 mg/L | Jan–Mar | 002 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 2.7 mg/L | Apr–Jun | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.7 mg/L | Jul–Sep | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.2 mg/L | Oct–Dec | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.8 mg/L | Jan–Mar | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.2 mg/L | Apr–Jun | 002 |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | annual average | ≤ 8966 lb/yr | all year | 002 |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year | 002 |
| Cyanide, total [as CN] | 6-month average | report only (mg/L) | all year | 002 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year | 002 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year | 002 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | 002 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | 002 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 002 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 002 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 002 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 002 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 002 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 002 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 002 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 002 |
| Molybdenum, total [as Mo] | daily maximum | report only (mg/L) | all year | 002 |
| Molybdenum, total [as Mo] | daily maximum | report only (mg/L) | all year | 002 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 002 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 002 |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | 002 |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | 002 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 002 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 002 |
| Selenium, total [as Se] | 6-month average | report only (mg/L) | all year | 002 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 002 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 002 |
| Flow, in conduit or thru treatment plant | maximum monthly average | ≤ 1.5 MGD | all year | 002 |
| Chlorine, total residual | maximum monthly average | ≤ .43 mg/L | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ .73 mg/L | all year | 002 |
| Phosphorus, ortho | 30-day average | report only (mg/L) | all year | 002 |
| E. coli | 30-day geometric mean | ≤ 126 #/100mL | all year | 002 |
| E. coli | 7-day geometric mean | ≤ 158 #/100mL | all year | 002 |
| Solids, total dissolved [TDS] | 30-day average | report only (mg/L) | all year | 002 |
| Nitrogen, nitrate total [as NO3] | 30-day average | report only (mg/L) | all year | 002 |
| Nitrogen, nitrite total [as NO2] | 30-day average | report only (mg/L) | all year | 002 |
| Mercury, total [as Hg] | 6-month average | report only (mg/L) | all year | 002 |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year | 002 |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year | 002 |
| BOD, 5-day, percent removal | minimum % removal | ≥ 85 % | all year | 002 |
| Solids, suspended percent removal | minimum | ≥ 65 % | all year | 002 |
Cited limits by parameter: Utah's rules and the federal ones.
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