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Sewage treatment plant, Haskell, Oklahoma. NPDES permit OK0032271, in force until Apr 30, 2030. Last 12 months: over a limit 8 times (last July 2026), 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| November 2025 | BOD, 5-day, 20 deg. C, monthly average | 35.35 mg/L | ≤ 30 mg/L | 18% |
| November 2025 | pH, maximum | 9.4 SU | ≤ 9 SU | — |
| February 2026 | pH, maximum | 9.5 SU | ≤ 9 SU | — |
| March 2026 | pH, maximum | 9.8 SU | ≤ 9 SU | — |
| April 2026 | pH, maximum | 10 SU | ≤ 9 SU | — |
| May 2026 | pH, maximum | 10.1 SU | ≤ 9 SU | — |
| June 2026 | pH, maximum | 10 SU | ≤ 9 SU | — |
| July 2026 | pH, maximum | 10.1 SU | ≤ 9 SU | — |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| 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 | ≤ 97.6 lb/d | all year |
| pH | minimum | ≥ 6.5 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 90 mg/L | all year |
| Solids, total suspended | weekly average | ≤ 135 mg/L | all year |
| Solids, total suspended | monthly average | ≤ 292.7 lb/d | 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 |
| E. coli | geometric mean | ≤ 126 CFU/100mL | May–Sep |
| E. coli | geometric mean | ≤ 630 CFU/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| E. coli | daily maximum | ≤ 406 CFU/100mL | May–Sep |
| E. coli | daily maximum | ≤ 2030 CFU/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
Cited limits by parameter: Oklahoma'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/OK0032271 · MCP: https://passage-data.com/mcp