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OG&E-Horseshoe # 9 &10

Electric Services, Oklahoma City, Oklahoma. NPDES permit OK0043966 expired Apr 30, 2026; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 15 days after each period: form A monthly (5 values), form Y yearly
Last report on file: September 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 0 of 13 reports late

Limits in force (7)

Parameter	Statistic	Limit	Months
pH	minimum	≥ 6.5 SU	all year
pH	maximum	≤ 9 SU	all year
Oxidants, total residual	instantaneous maximum	≤ .099 mg/L	all year
Oxidants, free available	monthly average	≤ .2 mg/L	all year
Oxidants, free available	daily maximum	≤ .5 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

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

Same industry: the 25 Electric Services permits in Oklahoma.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OK0043966 · MCP: https://passage-data.com/mcp