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Sewage treatment plant, major discharger, Payson, Utah. NPDES permit UT0020427, in force until Mar 31, 2029. Last 12 months: over a limit once (last July 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| July 2026 | Cyanide, total [as CN], maximum monthly average | .0073 mg/L | ≤ .0067 mg/L | 9% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 4 mg/L | all year |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 25 mg/L | all year |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 35 mg/L | all year |
| BOD, 5-day, 20 deg. C | maximum monthly average | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | maximum weekly average | report only (mg/L) | all year |
| pH | daily minimum | ≥ 6.5 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| Solids, total suspended | maximum monthly average | ≤ 25 mg/L | all year |
| Solids, total suspended | maximum weekly average | ≤ 35 mg/L | all year |
| Solids, total suspended | maximum monthly average | report only (mg/L) | all year |
| Solids, total suspended | maximum weekly average | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13.1 mg/L | Oct–Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13.1 mg/L | Apr–Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.1 mg/L | Jul–Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.5 mg/L | Jan–Mar |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (mg/L) | all year |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (mg/L) | all year |
| Phosphorus, total [as P] | annual average | ≤ 4.6 mg/L | all year |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year |
| Cyanide, free [as free] | 30-day average | report only (mg/L) | all year |
| Cyanide, total [as CN] | maximum monthly average | ≤ .0067 mg/L | all year |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year |
| Molybdenum, total [as Mo] | daily maximum | report only (mg/L) | all year |
| Molybdenum, total [as Mo] | daily maximum | report only (mg/L) | all year |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year |
| Selenium, total [as Se] | maximum monthly average | ≤ .0069 mg/L | all year |
| Selenium, total [as Se] | daily maximum | ≤ .0241 mg/L | all year |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year |
| Oil and grease | daily maximum | ≤ 10 mg/L | all year |
| Phosphate, ortho [as P] | 30-day average | report only (mg/L) | all year |
| Flow, in conduit or thru treatment plant | maximum monthly average | ≤ 3 MGD | all year |
| Chlorine, total residual | daily maximum | ≤ 2.4 mg/L | Jan–Mar |
| Chlorine, total residual | daily maximum | ≤ 1.1 mg/L | Jul–Sep |
| Chlorine, total residual | daily maximum | ≤ 1.6 mg/L | Apr, May, Jun, Oct, Nov, Dec |
| E. coli | 30-day geometric mean | ≤ 126 #/100mL | all year |
| E. coli | 7-day geometric mean | ≤ 157 #/100mL | all year |
| Solids, total dissolved | 30-day average | report only (mg/L) | all year |
| Nitrogen, nitrate total [as NO3] | 30-day average | report only (mg/L) | all year |
| Nitrogen, nitrite total [as NO2] | 30-day average | report only (mg/L) | all year |
| Mercury, total [as Hg] | maximum monthly average | ≤ .000015 mg/L | all year |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year |
| Organics, total toxic [TTO] | annual total | report only (mg/L) | all year |
| Organics, total toxic [TTO] | annual total | report only (mg/L) | all year |
| BOD, 5-day, percent removal | minimum % removal | ≥ 85 % | all year |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | daily maximum | ≤ 0 pass=0;fail=1 | Jan, Feb, Mar, Jul, Aug, Sep |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | daily maximum | ≤ 0 pass=0;fail=1 | Apr, May, Jun, Oct, Nov, Dec |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Chlorine, total residual, daily maximum | 0.4 mg/L (Apr–Jun) | tighter | 1.5 mg/L (3 values) | 3.75× |
| Chlorine, total residual, daily maximum | 0.3 mg/L (Jan–Mar) | tighter | 1.1 mg/L (3 values) | 3.67× |
| Nitrogen, ammonia total [as N], daily maximum | 4 mg/L (Apr–Jun) | tighter | 4.26 mg/L (3 values) | 1.06× |
| Chlorine, total residual, daily maximum | 0.7 mg/L (Jul–Sep) | tighter | — | — |
| Chlorine, total residual, maximum monthly average | 0.5 mg/L (Jul–Sep) | tighter | — | — |
| Chlorine, total residual, maximum monthly average | 0.3 mg/L (Apr–Jun) | tighter | — | — |
| Chlorine, total residual, maximum monthly average | 0.2 mg/L (Jan–Mar) | tighter | — | — |
| Cyanide, total [as CN], maximum monthly average | 0.0057 mg/L | tighter | 0.005 mg/L (11 values) | 0.877× |
| Mercury, total [as Hg], maximum monthly average | 0.000013 mg/L | tighter | 0.00000355 mg/L (11 values) | 0.273× |
| Nitrogen, ammonia total [as N], daily maximum | 4.5 mg/L (Jul–Sep) | tighter | — | — |
| Nitrogen, ammonia total [as N], daily maximum | 7 mg/L (Oct–Dec) | tighter | 2.15 mg/L (3 values) | 0.307× |
| Nitrogen, ammonia total [as N], daily maximum | 8.5 mg/L (Jan–Mar) | tighter | 5.41 mg/L (3 values) | 0.636× |
| Nitrogen, ammonia total [as N], maximum monthly average | 4 mg/L (Apr–Jun) | tighter | — | — |
| Nitrogen, ammonia total [as N], maximum monthly average | 3 mg/L (Jul–Sep) | tighter | — | — |
| Nitrogen, ammonia total [as N], maximum monthly average | 6 mg/L (Oct–Dec) | tighter | — | — |
| Nitrogen, ammonia total [as N], maximum monthly average | 6 mg/L (Jan–Mar) | tighter | — | — |
| Phosphorus, total [as P], annual average | 1 mg/L | tighter | — | — |
| Selenium, total [as Se], daily maximum | 0.0121 mg/L | tighter | 0.00118 mg/L (14 values) | 0.0975× |
| Selenium, total [as Se], maximum monthly average | 0.0055 mg/L | tighter | 0.001055 mg/L (11 values) | 0.192× |
Cited limits by parameter: Utah's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
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