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Sewage treatment plant, major discharger, Soda Springs, Idaho. NPDES permit ID0020818 expired Jun 30, 2025; its limits still apply. Last 12 months: no values over a limit, 5 of 73 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | instantaneous maximum | report only (deg C) | all year | 001 |
| Septage discharged to treatment fac. | monthly total | report only (gal) | 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 | monthly average | ≤ 430 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 640 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | 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 | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | annual average | ≤ 194 lb/d | Dec | 001 |
| Solids, total suspended | monthly average | ≤ 222 lb/d | all year | 001 |
| Solids, total suspended | weekly average | ≤ 283 lb/d | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | weekly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | annual average | ≤ 5.82 lb/d | Dec | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 13 lb/d | all year | 001 |
| Phosphorus, total [as P] | weekly average | report only (lb/d) | all year | 001 |
| Arsenic, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Zinc, total recoverable | monthly average | ≤ .83 mg/L | all year | 001 |
| Zinc, total recoverable | daily maximum | ≤ 1.44 mg/L | all year | 001 |
| Zinc, total recoverable | monthly average | ≤ 11.8 lb/d | all year | 001 |
| Zinc, total recoverable | daily maximum | ≤ 20.4 lb/d | all year | 001 |
| E. coli, MTEC-MF | monthly geometric mean | ≤ 126 #/100mL | all year | 001 |
| E. coli, MTEC-MF | instantaneous maximum | report only (#/100mL) | all year | 001 |
| Flow, in conduit or thru treatment plant | maximum daily average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | maximum daily average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Toxicity [chronic], Ceriodaphnia dubia | quarterly maximum | report only (tox chronic) | all year | 001 |
| Toxicity [chronic], Ceriodaphnia dubia | value | report only (tox chronic) | all year | 001 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | quarterly maximum | report only (tox chronic) | all year | 001 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | value | report only (tox chronic) | 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 |
| Stream flow, instantaneous | monthly average | report only (cfs) | all year | REC1 |
| pH | instantaneous minimum | report only (SU) | all year | REC1 |
| pH | instantaneous maximum | report only (SU) | all year | REC1 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | REC1 |
| Copper, dissolved [as Cu] | monthly average | report only (ug/L) | all year | REC1 |
| Zinc, dissolved [as Zn] | monthly average | report only (ug/L) | all year | REC1 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | REC2 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | REC2 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | REC2 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | REC2 |
| pH | instantaneous minimum | report only (SU) | all year | REC2 |
| pH | instantaneous minimum | report only (SU) | all year | REC2 |
| pH | instantaneous maximum | report only (SU) | all year | REC2 |
| pH | instantaneous maximum | report only (SU) | all year | REC2 |
| Alkalinity, total [as CaCO3] | daily maximum | report only (mg/L) | all year | REC2 |
| Alkalinity, total [as CaCO3] | daily maximum | report only (mg/L) | all year | REC2 |
| Carbon, dissolved organic [as C] | daily maximum | report only (mg/L) | all year | REC2 |
| Carbon, dissolved organic [as C] | daily maximum | report only (mg/L) | all year | REC2 |
| Calcium, dissolved [as Ca] | daily maximum | report only (mg/L) | all year | REC2 |
| Calcium, dissolved [as Ca] | daily maximum | report only (mg/L) | all year | REC2 |
| Magnesium, dissolved [as Mg] | daily maximum | report only (mg/L) | all year | REC2 |
| Magnesium, dissolved [as Mg] | daily maximum | report only (mg/L) | all year | REC2 |
| Sodium, dissolved [as Na] | daily maximum | report only (mg/L) | all year | REC2 |
| Sodium, dissolved [as Na] | daily maximum | report only (mg/L) | all year | REC2 |
| Potassium, dissolved [as K] | daily maximum | report only (mg/L) | all year | REC2 |
| Potassium, dissolved [as K] | daily maximum | report only (mg/L) | all year | REC2 |
| Chloride, dissolved in water | daily maximum | report only (mg/L) | all year | REC2 |
| Chloride, dissolved in water | daily maximum | report only (mg/L) | all year | REC2 |
| Sulfate, dissolved [as SO4] | daily maximum | report only (mg/L) | all year | REC2 |
| Sulfate, dissolved [as SO4] | daily maximum | report only (mg/L) | all year | REC2 |
| Copper, dissolved [as Cu] | daily maximum | report only (mg/L) | all year | REC2 |
| Copper, dissolved [as Cu] | daily maximum | report only (ug/L) | all year | REC2 |
Cited limits by parameter: Idaho'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/ID0020818 · MCP: https://passage-data.com/mcp