Public Water Partners

HONOLULU, HI · Honolulu County

HNL-WINDWARD-PEARL HARBOR Water System

Consumer Confidence Report status

HNL-WINDWARD-PEARL HARBOR must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for HNL-WINDWARD-PEARL HARBOR.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Hawaii’s official records. Always confirm current status with Hawaii before making decisions based on this information.

System facts

System ID (PWSID)
HI0000331
System type
Community Water System
Population served
631,389
Service connections
106,491
Ownership
local government
Water source
groundwater (wells)

HNL-WINDWARD-PEARL HARBOR is the largest community water system in Hawaii, serving 631,389 people from groundwater.

As of August 1, 2026, its federal record holds 25 entries in 2008, all of which EPA lists as closed. Nothing has been added since 2008.

All 25 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves volatile organic chemicals, inorganic chemicals, and synthetic organic chemicals.

Violation history

  • Monitoring, Regular

    —

    Arsenic

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    Barium

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    Chromium

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    Mercury

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    Nickel

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    Antimony, Total

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    Beryllium, Total

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    Thallium, Total

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    Nitrate

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    Nitrite

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    1,2,4-Trichlorobenzene

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    cis-1,2-Dichloroethylene

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    Xylenes, Total

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    o-Dichlorobenzene

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    p-Dichlorobenzene

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    Vinyl chloride

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    1,1-Dichloroethylene

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloroethane

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    1,1,1-Trichloroethane

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    Carbon tetrachloride

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    1,1,2-Trichloroethane

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    Ethylbenzene

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    OXAMYL

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    1,2-DIBROMO-3-CHLOROPROPANE

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    ETHYLENE DIBROMIDE

    January 1, 2008 – December 31, 2010

    Resolved

Resolved addressed and confirmed by the state

Enforcement actions

No enforcement actions on record for this system.

Common questions

Is HNL-WINDWARD-PEARL HARBOR required to publish a Consumer Confidence Report?

Yes. HNL-WINDWARD-PEARL HARBOR is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is HNL-WINDWARD-PEARL HARBOR’s next Consumer Confidence Report due?

HNL-WINDWARD-PEARL HARBOR’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

Does HNL-WINDWARD-PEARL HARBOR have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show no open violations for HNL-WINDWARD-PEARL HARBOR.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

KAWATA, ERWIN

808-748-5080

HONOLULU, HI 96843