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Sewage treatment plant, Boswell, Oklahoma. NPDES permit OK0032255, in force until May 31, 2031. Last 12 months: over a limit 3 times (last December 2025), 22 required values missing, 8 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | BOD, 5-day, 20 deg. C, monthly average | 29.52 lb/d | ≤ 16.3 lb/d | 81% |
| December 2025 | BOD, 5-day, 20 deg. C, monthly average | > 123 mg/L | ≤ 30 mg/L | — |
| December 2025 | BOD, 5-day, 20 deg. C, weekly average | > 123 mg/L | ≤ 45 mg/L | — |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 18.8 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec |
| pH | minimum | ≥ 6.5 SU | Jan, Feb, Mar, Apr, May, Nov, Dec |
| pH | maximum | ≤ 9 SU | Jan, Feb, Mar, Apr, May, Nov, Dec |
| Solids, total suspended | monthly average | ≤ 90 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec |
| Solids, total suspended | weekly average | ≤ 135 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec |
| Solids, total suspended | monthly average | ≤ 56.3 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec |
| Flow, in conduit or thru treatment plant | monthly average | ≤ 0 MGD | Jun–Oct |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | Jan, Feb, Mar, Apr, May, Nov, Dec |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 0 MGD | Jun–Oct |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Jan, Feb, Mar, Apr, May, Nov, Dec |
Cited limits by parameter: Oklahoma's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
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