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County of Maui

Industrial or other facility, Wailuku, Hawaii. NPDES permit HI0021946, in force until Sep 30, 2027. Last 12 months: no values over a limit, 3 of 15 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (16 values), form Q quarterly (1 value)
Renewal application due
Apr 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 13 required values missing, 8 of 16 reports late

Limits in force (22)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademaximum single sample≤ 1 deg Call year
Turbiditygeometric mean≤ 5 NTUJan, Feb, Mar, Apr, Nov, Dec
Turbiditygeometric mean≤ 2 NTUMay–Oct
Turbiditymaximum single sample≤ 15 NTUJan, Feb, Mar, Apr, Nov, Dec
Turbiditymaximum single sample≤ 5.5 NTUMay–Oct
pHminimum≥ 5.5 SUall year
pHmaximum≤ 8 SUall year
Solids, total suspendedgeometric mean≤ 20 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedgeometric mean≤ 10 mg/LMay–Oct
Solids, total suspendedmaximum single sample≤ 50 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmaximum single sample≤ 30 mg/LMay–Oct
Solids, total suspendedmaximum single sample≤ 181 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmaximum single sample≤ 109 lb/dMay–Oct
Nitrogen, total [as N]geometric meanreport only (ug/L)all year
Nitrogen, total [as N]maximum single samplereport only (ug/L)all year
Copper, total recoverablemaximum single sample≤ 6.25 ug/Lall year
Copper, total recoverablemaximum single sample≤ .02 lb/dall year
Chloroformmaximum single samplereport only (ug/L)all year
Flow, in conduit or thru treatment plantmaximum single samplereport only (MGD)all year
Chlorine, total residualmaximum single sample≤ 19 ug/Lall year
Chlorine, total residualmaximum single sample≤ .07 lb/dall year
Pass/Fail Static Renewal 96Hr Acute Pimephales Promelasmaximum single sample≤ 0 pass=0;fail=1all year

How strict are these limits?

Cited limits by parameter: Hawaii'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/HI0021946 · MCP: https://passage-data.com/mcp