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Noble UA (North)

Sewage treatment plant, Noble, Oklahoma. NPDES permit OK0031755, in force until Oct 31, 2030. Last 12 months: over a limit 12 times (last June 2026), 6 required values missing, 3 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (16 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 0 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
October 2025E. coli, daily maximum2419.6 MPN/100mL≤ 2030 MPN/100mL19%
December 2025Nitrogen, ammonia total [as N], monthly average5.6 mg/L≤ 4.1 mg/L37%
December 2025Nitrogen, ammonia total [as N], weekly average16.9 mg/L≤ 6.2 mg/L173%
February 2026Nitrogen, ammonia total [as N], monthly average29.3 mg/L≤ 4.1 mg/L615%
February 2026Nitrogen, ammonia total [as N], weekly average32.7 mg/L≤ 6.2 mg/L427%
March 2026Nitrogen, ammonia total [as N], monthly average106.2 lb/d≤ 26 lb/d308%
March 2026Nitrogen, ammonia total [as N], monthly average27.6 mg/L≤ 4.1 mg/L573%
March 2026Nitrogen, ammonia total [as N], weekly average35.4 mg/L≤ 6.2 mg/L471%
April 2026E. coli, daily maximum2419 MPN/100mL≤ 2030 MPN/100mL19%
April 2026Nitrogen, ammonia total [as N], monthly average4.7 mg/L≤ 4.1 mg/L15%
April 2026Nitrogen, ammonia total [as N], weekly average8.8 mg/L≤ 6.2 mg/L42%
June 2026E. coli, daily maximum2419 MPN/100mL≤ 406 MPN/100mL496%

Limits in force (22)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 5.5 mg/LJun–Oct
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/LApr, May
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 190.1 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 4.1 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 6.2 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 26 lb/dall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
E. coligeometric mean≤ 630 MPN/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
E. coligeometric mean≤ 126 MPN/100mLMay–Sep
E. colidaily maximum≤ 2030 MPN/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
E. colidaily maximum≤ 406 MPN/100mLMay–Sep
BOD, carbonaceous [5 day, 20 C]monthly average≤ 12 mg/LJun–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
BOD, carbonaceous [5 day, 20 C]weekly average≤ 18 mg/LJun–Oct
BOD, carbonaceous [5 day, 20 C]weekly average≤ 37.5 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 76.1 lb/dJun–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 158.5 lb/dJan, Feb, Mar, Apr, May, Nov, Dec

How strict are these limits?

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/OK0031755 · MCP: https://passage-data.com/mcp