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Hulbert PWA

Sewage treatment plant, Hulbert, Oklahoma. NPDES permit OK0032328, in force until Nov 30, 2028. Last 12 months: over a limit 8 times (last August 2026), 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 15 days after each period: form A monthly (13 values)
Last report on file: September 2026
Oct 2024 – Sep 2025: 8 values over a limit, 13 required values missing, 7 of 12 reports late

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

Period ending	Parameter	Reported	Limit	Over by
October 2025	pH, minimum	6.41 SU	≥ 6.5 SU	—
November 2025	pH, minimum	6.22 SU	≥ 6.5 SU	—
February 2026	Solids, total suspended, monthly average	44.2 mg/L	≤ 30 mg/L	47%
February 2026	Solids, total suspended, weekly average	73.2 mg/L	≤ 45 mg/L	63%
March 2026	BOD, 5-day, 20 deg. C, monthly average	60.97 lb/d	≤ 12.5 lb/d	388%
March 2026	Solids, total suspended, monthly average	26.26 lb/d	≤ 18.8 lb/d	40%
May 2026	pH, minimum	6.48 SU	≥ 6.5 SU	—
August 2026	E. coli, daily maximum	690 CFU/100mL	≤ 235 CFU/100mL	194%

Limits in force (13)

Parameter	Statistic	Limit	Months
BOD, 5-day, 20 deg. C	monthly average	≤ 20 mg/L	all year
BOD, 5-day, 20 deg. C	weekly average	≤ 30 mg/L	all year
BOD, 5-day, 20 deg. C	monthly average	≤ 12.5 lb/d	all year
pH	minimum	≥ 6.5 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	monthly average	≤ 30 mg/L	all year
Solids, total suspended	weekly average	≤ 45 mg/L	all year
Solids, total suspended	monthly average	≤ 18.8 lb/d	all year
Phosphorus, total [as P]	monthly average	report only (mg/L)	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	daily maximum	≤ 235 CFU/100mL	May–Sep

How strict are these limits?

E. coli, daily maximum 235 CFU/100mL — stricter than 90% of 62 other minor POTWs in Oklahoma; 10% have the same limit
BOD, 5-day, 20 deg. C, monthly average 20 mg/L — stricter than 60% of 158 other minor POTWs in Oklahoma; 38% have the same limit
BOD, 5-day, 20 deg. C, weekly average 30 mg/L — stricter than 60% of 152 other minor POTWs in Oklahoma; 38% have the same limit

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/OK0032328 · MCP: https://passage-data.com/mcp