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EWG's Tap Water Database — 2021 UPDATE

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Hawaii

  • 118 Utilities

  • Serving: 1,507,000

  • Data available: 2014-2019

  • Contaminants Found: 56

 

EWG's drinking water quality report for Hawaii shows results of tests conducted by the water utilities in Hawaii and provided to EWG by the Hawaii Department of Health.

LARGE UTILITIES
ALL UTILITIES WITH VIOLATIONS

Below are utilities in Hawaii serving over 10,000 people, listed alphabetically.

Large utilities in Hawaii

UtilityLocationPeople
Served
HiloHilo, HI39,477
Honolulu-Windward-Pearl HarborHonolulu, HI631,389
Joint Base Pearl Harbor-HickamJbpph, HI65,230
Kalaheo-KoloaLihue, HI12,660
LahainaWailuku, HI20,065
Lihue-KapaaLihue, HI34,854
MakawaoWailuku, HI29,868
Marine Corps Base HawaiiKaneohe Bay, HI16,300
MililaniHonolulu, HI50,573
North KonaHilo, HI29,581
Schofield BarracksSchofield Barracks, HI37,920
WahiawaHonolulu, HI23,348
WaikoloaWaikoloa, HI12,100
WailukuWailuku, HI74,511
Waipahu-Ewa-WaianaeHonolulu, HI217,479
Waipio HeightsHonolulu, HI11,516

Utilities that accumulated/accrued the most violation points as of April 2019 to March 2021 in Hawaii

The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.

UtilityLocationPeople
Served		Violation
Points
HoolehuaKaunakakai, HI2,4001

Large utilities that accumulated/accrued the most violation points as of April 2019 to March 2021 in Hawaii

The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.

UtilityLocationPeople
Served		Violation
Points

Contaminants found in Hawaii above health guidelines

Found above health guidelinesFound
Contaminant# of UtilitiesPeople Served# of UtilitiesPeople Served

Nitrate		841,447,379891,458,204

Nitrate and nitrite		801,445,255811,445,362

Total trihalomethanes (TTHMs)		941,427,338951,432,254

Chromium (hexavalent)		271,357,254271,357,254

Bromoform		711,253,089821,391,813

Haloacetic acids (HAA9)		191,222,968221,288,589

1,2,3-Trichloropropane		171,051,204171,051,204

Arsenic		6677,5886677,588

Vanadium		16559,995251,349,608

Dibromochloromethane		66458,280701,340,108

Haloacetic acids (HAA5)		64418,61664418,616

Dibromoacetic acid		50327,77051959,159

Bromodichloromethane		46302,59347520,072

Trichloroacetic acid		29275,71429275,714

Dichloroacetic acid		22221,82523853,214

Chloroform		30216,18337477,146

1,2-Dibromo-3-chloropropane (DBCP)		5100,6269353,564

Bromochloroacetic acid		797,194797,194

Chlordane		271,6365719,373

Tetrachloroethylene (perchloroethylene)		358,797358,797

Trichloroethylene		137,920137,920

Chlorate		11,360161,206,829

Atrazine		29671113,138

Ethylene dibromide		1100220,165

Contaminants found in Hawaii above legal limits

Contaminant# of UtilitiesPeople Served