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Red Oak Public Works Authority

NPDES permit OK1000021 · Minor industrial permit · effective, expires Sep 30, 2031 · EPA data of Oct 7, 2026

Permit summary (.xlsx)

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EPA ECHOFacility reportDMR history

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

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Reporting

Reports due

About 15 days after each period ends

How strict are these limits?

Compared with the same limit in similar permits.

• Solids, total suspended, daily maximum 30 mg/L — stricter than 58% of 104 other minor industrial and other permits in Oklahoma; 38% have the same limit
• Solids, total suspended, monthly average 20 mg/L — stricter than 42% of 84 other minor industrial and other permits in Oklahoma; 50% have the same limit
• Chlorine, total residual, instantaneous maximum .099 mg/L — stricter than 6% of 48 other minor industrial and other permits in Oklahoma; 94% have the same limit
• pH, minimum at least 6.5 SU — stricter than 3% of 143 other minor industrial and other permits in Oklahoma; 97% have the same limit
• pH, maximum 9 SU — stricter than 0% of 142 other minor industrial and other permits in Oklahoma; 99% have the same limit
• Iron, dissolved [as Fe], monthly average 1 mg/L — stricter than 0% of 42 other minor industrial and other permits in Oklahoma; 100% have the same limit
• Iron, dissolved [as Fe], daily maximum 2 mg/L — stricter than 0% of 37 other minor industrial and other permits in Oklahoma; 100% have the same limit
• Manganese, dissolved [as Mn], monthly average 1 mg/L — stricter than 0% of 42 other minor industrial and other permits in Oklahoma; 100% have the same limit
• Manganese, dissolved [as Mn], daily maximum 2 mg/L — stricter than 0% of 37 other minor industrial and other permits in Oklahoma; 100% have the same limit
• Aluminum, dissolved [as Al], monthly average 1 mg/L — stricter than 0% of 42 other minor industrial and other permits in Oklahoma; 100% have the same limit
• Aluminum, dissolved [as Al], daily maximum 2 mg/L — stricter than 0% of 37 other minor industrial and other permits in Oklahoma; 100% have the same limit

Limits in force (17)

From EPA's ECHO data, not the permit document itself: your permit is the final word. All states