City and County of Honolulu, Board of Water Supply

NPDES permit HI0021950 · Minor NON-POTW · effective, expires 2031-04-30 · EPA's file as of 2026-09-19

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

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Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among HI permits in EPA's filings — check your permit).

Limits in force (54)

OutfallParameterStatisticLimitMonths
001ATurbidityANNL AVG <= 5 NTU Jan, Feb, Mar, Apr, Nov, Dec
001ATurbidityANNL AVG <= 2 NTU May, Jun, Jul, Aug, Sep, Oct
001ATurbidityMW <= 5 NTU Jan, Feb, Mar, Apr, Nov, Dec
001ATurbidityMW <= 2 NTU May, Jun, Jul, Aug, Sep, Oct
001ApHMINIMUM >= 5.5 SU all year
001ApHMAXIMUM <= 8 SU all year
001ASolids, total suspendedANNL AVG <= 20 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001ASolids, total suspendedANNL AVG <= 10 mg/L May, Jun, Jul, Aug, Sep, Oct
001ASolids, total suspendedMW <= 20 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001ASolids, total suspendedMW <= 10 mg/L May, Jun, Jul, Aug, Sep, Oct
001ASolids, total suspendedANNL AVG <= 240.2 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001ASolids, total suspendedANNL AVG <= 120.1 lb/d May, Jun, Jul, Aug, Sep, Oct
001ASolids, total suspendedMW <= 240.2 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001ASolids, total suspendedMW <= 120.1 lb/d May, Jun, Jul, Aug, Sep, Oct
001ANitrogen, total [as N]ANNL AVG report only all year
001ANitrogen, total [as N]MW report only all year
001APhosphorus, total [as P]ANNL AVG report only all year
001APhosphorus, total [as P]MW report only all year
001ACopper, total recoverableANNL AVG report only all year
001ACopper, total recoverableMW report only all year
001AFlow, totalANNL AVG report only all year
001AFlow, totalMW report only all year
001BTurbidityANNL AVG <= 5 NTU Jan, Feb, Mar, Apr, Nov, Dec
001BTurbidityANNL AVG <= 2 NTU May, Jun, Jul, Aug, Sep, Oct
001BTurbidityMW <= 5 NTU Jan, Feb, Mar, Apr, Nov, Dec
001BTurbidityMW <= 2 NTU May, Jun, Jul, Aug, Sep, Oct
001BpHMINIMUM >= 5.5 SU all year
001BpHMAXIMUM <= 8 SU all year
001BSolids, total suspendedANNL AVG <= 20 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BSolids, total suspendedANNL AVG <= 10 mg/L May, Jun, Jul, Aug, Sep, Oct
001BSolids, total suspendedMW report only Jan, Feb, Mar, Apr, Nov, Dec
001BSolids, total suspendedMW <= 10 mg/L May, Jun, Jul, Aug, Sep, Oct
001BSolids, total suspendedANNL AVG <= 14 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001BSolids, total suspendedANNL AVG <= 7 lb/d May, Jun, Jul, Aug, Sep, Oct
001BSolids, total suspendedMW <= 14 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001BSolids, total suspendedMW <= 7 lb/d May, Jun, Jul, Aug, Sep, Oct
001BNitrogen, total [as N]ANNL AVG report only all year
001BNitrogen, total [as N]MW report only all year
001BPhosphorus, total [as P]ANNL AVG report only all year
001BPhosphorus, total [as P]MW report only all year
001BCopper, total recoverableANNL AVG report only all year
001BCopper, total recoverableMW report only all year
001B1,2-DichloropropaneANNL AVG report only all year
001B1,2-DichloropropaneMW report only all year
001BTrichloroethyleneANNL AVG <= 7 ug/L all year
001BTrichloroethyleneMW <= 15000 ug/L all year
001BChlorine, total residualANNL AVG report only all year
001BChlorine, total residualMW <= 19 ug/L all year
001BFlow, totalANNL AVG report only all year
001BFlow, totalMW report only all year
001BPass/Fail Static Renewal 96Hr Acute Ceriodaphnia dubiaANNL AVG report only all year
001BPass/Fail Static Renewal 96Hr Acute Ceriodaphnia dubiaMW report only all year
001BPass/Fail Static Renewal 96Hr Acute Pimephales PromelasANNL AVG report only all year
001BPass/Fail Static Renewal 96Hr Acute Pimephales PromelasMW report only 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