Public Water Partners

WAILUKU, HI · Maui County

LAHAINA Water System

Consumer Confidence Report status

LAHAINA 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 LAHAINA.

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)
HI0000214
System type
Community Water System
Population served
20,065
Service connections
3,236
Ownership
local government
Water source
surface water (rivers, lakes, or reservoirs)

LAHAINA is among the 13 largest community water systems in Hawaii, serving 20,065 people from surface water.

As of August 1, 2026, its federal record holds 20 entries between 1982 and 2016, all of which EPA lists as closed. Nothing has been added since 2016.

Of the 20, 17 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 synthetic organic chemicals, the Surface Water Treatment Rules, and inorganic chemicals.

Violation history

  • Monitoring, Source Water (LT2)

    —

    Turbidity

    November 1, 2016 – November 30, 2016

    Resolved

  • Monitoring, Source Water (LT2)

    —

    Cryptosporidium

    November 1, 2016 – November 30, 2016

    Resolved

  • Monitoring, Regular

    —

    2,4-D

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    Pentachlorophenol

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    Di(2-ethylhexyl) adipate

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    Di(2-ethylhexyl) phthalate

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    Benzo(a)pyrene

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    Diquat

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    Endothall

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    CYANIDE

    January 1, 2008 – May 6, 2010

    Resolved

  • Monitoring, Regular

    —

    Dalapon

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    Picloram

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    Dinoseb

    January 1, 2008 – December 31, 2010

    Resolved

  • Monitoring, Regular

    —

    2,4,5-TP

    January 1, 2008 – December 31, 2010

    Resolved

  • Treatment Technique (SWTR and GWR)

    Health-based

    Surface Water Treatment Rule

    November 1, 1994 – November 30, 1994

    Resolved

  • Monitoring of Treatment (SWTR-Filter)

    —

    Surface Water Treatment Rule

    September 1, 1994 – September 30, 1994

    Archived

  • Treatment Technique (SWTR and GWR)

    Health-based

    Surface Water Treatment Rule

    May 1, 1994 – May 31, 1994

    Archived

  • Monitoring of Treatment (SWTR-Filter)

    —

    Surface Water Treatment Rule

    August 1, 1993 – August 31, 1993

    Archived

  • Monitoring of Treatment (SWTR-Filter)

    —

    Surface Water Treatment Rule

    July 1, 1993 – July 31, 1993

    Archived

  • Notification, Public

    —

    Coliform (Pre-TCR)

    June 30, 1982 – July 29, 1982

    Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

Common questions

Is LAHAINA required to publish a Consumer Confidence Report?

Yes. LAHAINA 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 LAHAINA’s next Consumer Confidence Report due?

LAHAINA’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

Does LAHAINA have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show no open violations for LAHAINA.

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

PEARSON, JEFF

808-270-7834

WAILUKU, HI 96793-2155