County of Maui

NPDES permit HI0021946 · Minor NON-POTW · effective, expires 2027-09-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

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

0values over a limit
0required values missing, on 0 form(s)
4of 15 forms filed late

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

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (22)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeMW <= 1 deg C all year
001TurbidityGEO MEAN <= 5 NTU Jan, Feb, Mar, Apr, Nov, Dec
001TurbidityGEO MEAN <= 2 NTU May, Jun, Jul, Aug, Sep, Oct
001TurbidityMW <= 15 NTU Jan, Feb, Mar, Apr, Nov, Dec
001TurbidityMW <= 5.5 NTU May, Jun, Jul, Aug, Sep, Oct
001pHMINIMUM >= 5.5 SU all year
001pHMAXIMUM <= 8 SU all year
001Solids, total suspendedGEO MEAN <= 20 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Solids, total suspendedGEO MEAN <= 10 mg/L May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedMW <= 50 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Solids, total suspendedMW <= 30 mg/L May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedMW <= 181 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Solids, total suspendedMW <= 109 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, total [as N]GEO MEAN report only all year
001Nitrogen, total [as N]MW report only all year
001Copper, total recoverableMW <= 6.25 ug/L all year
001Copper, total recoverableMW <= .02 lb/d all year
001ChloroformMW report only all year
001Flow, in conduit or thru treatment plantMW report only all year
001Chlorine, total residualMW <= 19 ug/L all year
001Chlorine, total residualMW <= .07 lb/d all year
001Pass/Fail Static Renewal 96Hr Acute Pimephales PromelasMW <= 0 pass=0;fail=1 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