Henryetta, City of

NPDES permit OK0002551 · Minor NON-POTW · effective, expires 2031-04-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
8of 22 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (34)

OutfallParameterStatisticLimitMonths
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 20 mg/L all year
001Solids, total suspendedDAILY MX <= 30 mg/L all year
001Solids, total suspendedMO AVG <= 25 lb/d all year
001Iron, dissolved [as Fe]MO AVG <= 1 mg/L all year
001Iron, dissolved [as Fe]DAILY MX <= 2 mg/L all year
001Iron, dissolved [as Fe]MO AVG <= 1.25 lb/d all year
001Manganese, dissolved [as Mn]MO AVG <= 1 mg/L all year
001Manganese, dissolved [as Mn]DAILY MX <= 2 mg/L all year
001Manganese, dissolved [as Mn]MO AVG <= 1.25 lb/d all year
001Aluminum, dissolved [as Al]MO AVG <= 1 mg/L all year
001Aluminum, dissolved [as Al]DAILY MX <= 2 mg/L all year
001Aluminum, dissolved [as Al]MO AVG <= 1.25 lb/d all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualINST MAX <= .099 mg/L all year
002pHMINIMUM >= 6.5 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedMO AVG <= 20 mg/L all year
002Solids, total suspendedDAILY MX <= 30 mg/L all year
002Solids, total suspendedMO AVG <= 2.5 lb/d all year
002Iron, dissolved [as Fe]MO AVG <= 1 mg/L all year
002Iron, dissolved [as Fe]DAILY MX <= 2 mg/L all year
002Iron, dissolved [as Fe]MO AVG <= .1 lb/d all year
002Manganese, dissolved [as Mn]MO AVG <= 1 mg/L all year
002Manganese, dissolved [as Mn]DAILY MX <= 2 mg/L all year
002Manganese, dissolved [as Mn]MO AVG <= .1 lb/d all year
002Aluminum, dissolved [as Al]MO AVG <= 1 mg/L all year
002Aluminum, dissolved [as Al]DAILY MX <= 2 mg/L all year
002Aluminum, dissolved [as Al]MO AVG <= .1 lb/d all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Chlorine, total residualINST MAX <= .099 mg/L all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states