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Sewage treatment plant, Mounds, Oklahoma. NPDES permit OK0022888, in force until Jan 31, 2027. Last 12 months: over a limit once (last May 2026), 3 required values missing, 3 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit |
|---|---|---|---|
| May 2026 | pH, maximum | 9.96 SU | ≤ 9 SU |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | monthly minimum | ≥ 7 mg/L | Apr, May |
| Oxygen, dissolved [DO] | monthly minimum | ≥ 5 mg/L | Jan, Feb, Mar, Nov, Dec |
| 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 | ≤ 40 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec |
| pH | minimum | ≥ 6.5 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| 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 | ≤ 120.1 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 | 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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