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Choctaw Co. RW & SD #1-Grant

Sewage treatment plant, Grant, Oklahoma. NPDES permit OK0037826, in force until Jul 31, 2028. Last 12 months: no values over a limit, 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (6 values)
Renewal application due
Feb 2, 2028 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 2 of 12 reports late

Limits in force (18)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly minimum≥ 4 mg/LMar–May
Oxygen, dissolved [DO]monthly minimum≥ 3 mg/LJan, Feb, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 12.51 lb/dJan, Feb, Mar, Apr, May, Nov, Dec
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 90 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
Solids, total suspendedweekly average≤ 135 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
Solids, total suspendedmonthly average≤ 37.53 lb/dJan, Feb, Mar, Apr, May, Nov, Dec
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Jan, Feb, Mar, Apr, May, Nov, Dec
Flow, in conduit or thru treatment plantmonthly average≤ 0 MGDJun–Oct
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)Jan, Feb, Mar, Apr, May, Nov, Dec
Flow, in conduit or thru treatment plantdaily maximum≤ 0 MGDJun–Oct
E. coligeometric mean≤ 126 CFU/100mLMay–Sep
E. coligeometric mean≤ 630 CFU/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
E. colidaily maximum≤ 406 CFU/100mLMay–Sep
E. colidaily maximum≤ 2030 CFU/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec

How strict are these limits?

Cited limits by parameter: Oklahoma's rules and the federal ones.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OK0037826 · MCP: https://passage-data.com/mcp