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Sewage treatment plant, Sandpoint, Idaho. NPDES permit ID0021229 expired Aug 31, 2023; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. centigrade | maximum daily average | report only (deg C) | all year |
| Temperature, water deg. centigrade | maximum 7-day average | report only (deg C) | all year |
| Temperature, water deg. centigrade | instantaneous maximum | report only (deg C) | all year |
| Conductivity | monthly average | report only (umho/cm) | all year |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 86 lb/d | all year |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 129 lb/d | all year |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year |
| pH | instantaneous minimum | ≥ 6.5 SU | all year |
| pH | instantaneous maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year |
| Solids, total suspended | monthly average | ≤ 100 lb/d | all year |
| Solids, total suspended | weekly average | ≤ 150 lb/d | all year |
| Solids, total suspended | monthly average | report only (mg/L) | all year |
| Nitrogen, total [as N] | monthly average | ≤ 400 ug/L | all year |
| Nitrogen, total [as N] | weekly average | ≤ 401 ug/L | all year |
| Nitrogen, total [as N] | monthly average | ≤ 1.33 lb/d | all year |
| Nitrogen, total [as N] | weekly average | ≤ 1.34 lb/d | all year |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.77 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.56 mg/L | Jun–Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.63 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.07 mg/L | Jun–Sep |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5.9 lb/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5.2 lb/d | Jun–Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.4 lb/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13.6 lb/d | Jun–Sep |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Nitrite + Nitrate total [as N] | monthly average | ≤ 10 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Nitrite + Nitrate total [as N] | weekly average | ≤ 20.1 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Nitrite + Nitrate total [as N] | monthly average | ≤ 33.4 lb/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Nitrite + Nitrate total [as N] | weekly average | ≤ 67.1 lb/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Phosphorus, total [as P] | monthly average | ≤ 10 ug/L | Jun–Sep |
| Phosphorus, total [as P] | monthly average | report only (ug/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Phosphorus, total [as P] | daily maximum | report only (ug/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Phosphorus, total [as P] | weekly average | ≤ 18 ug/L | Jun–Sep |
| Phosphorus, total [as P] | daily maximum | report only (ug/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Phosphorus, total [as P] | monthly average | report only (ug/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Phosphorus, total [as P] | monthly average | ≤ .033 lb/d | Jun–Sep |
| Phosphorus, total [as P] | weekly average | ≤ .06 lb/d | Jun–Sep |
| Carbon, dissolved organic [as C] | monthly average | report only (mg/L) | all year |
| Cyanide, weak acid, dissociable | monthly average | report only (ug/L) | all year |
| Cyanide, weak acid, dissociable | monthly average | report only (ug/L) | all year |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year |
| Nickel, total recoverable | monthly average | report only (ug/L) | all year |
| Nickel, total recoverable | monthly average | report only (ug/L) | all year |
| Silver total recoverable | monthly average | report only (ug/L) | all year |
| Silver total recoverable | monthly average | report only (ug/L) | all year |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year |
| Cadmium, total recoverable | monthly average | report only (ug/L) | all year |
| Cadmium, total recoverable | monthly average | report only (ug/L) | all year |
| Lead, total recoverable | monthly average | report only (ug/L) | all year |
| Lead, total recoverable | monthly average | report only (ug/L) | all year |
| Chromium, total recoverable | monthly average | report only (ug/L) | all year |
| Chromium, total recoverable | monthly average | report only (ug/L) | all year |
| Copper, total recoverable | monthly average | report only (ug/L) | all year |
| Copper, total recoverable | monthly average | report only (ug/L) | all year |
| Chromium, hexavalent dissolved [as Cr] | monthly average | report only (ug/L) | all year |
| Chromium, hexavalent dissolved [as Cr] | monthly average | report only (ug/L) | all year |
| Oil and grease | monthly average | report only (mg/L) | all year |
| Oil and grease | daily maximum | report only (mg/L) | all year |
| E. coli, MTEC-MF | monthly geometric mean | ≤ 126 #/100mL | all year |
| E. coli, MTEC-MF | instantaneous maximum | ≤ 406 #/100mL | all year |
| Floating solids, waste or visible foam-visual | monthly maximum | ≤ 0 N=0;Y=1 | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Chlorine, total residual | monthly average | ≤ 50 ug/L | all year |
| Chlorine, total residual | daily maximum | ≤ 50 ug/L | all year |
| Chlorine, total residual | monthly average | ≤ .17 lb/d | all year |
| Chlorine, total residual | daily maximum | ≤ .17 lb/d | all year |
| Solids, total dissolved | monthly average | report only (mg/L) | all year |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year |
| Mercury, total recoverable | monthly average | report only (ug/L) | all year |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year |
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/ID0021229 · MCP: https://passage-data.com/mcp