Public water system profile

WAILUKU

Explore available public water records for WAILUKU (PWSID HI0000212). Find annual reports, results listed in those reports, official sources, and clear notes about what the records can and cannot show. This page does not show conditions at a specific tap.

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System Snapshot

Available system-level context

This snapshot shows the identity and context fields currently available for WAILUKU (PWSID HI0000212). Read it with the source links and limitations below.

Last updated: Data reviewed:

System identity

PWSID
HI0000212
State
Hawaii
Linked communities
Kahului
County context
Not listed in current record
System type
Not listed in current record
Source water
Approximately 92% groundwater and 8% surface water in 2025, including Central Maui wells and tunnel sources plus surface water treated at Iao Treatment Plant
Population served
Not listed in current record
Service connections
Not listed in current record
Latest reviewed report
2025 report link found
Data updated
2026-07-30

Read these as system-level fields from reviewed public records. Confirm provider and address-specific questions with official utility, city, state, or EPA sources.

Report-Listed Rows

Report-listed rows summarized from the latest reviewed report

2 report-listed rows are summarized for WAILUKU. A listed row is not the same thing as a current advisory or household tap result.

Report year
2025
Rows summarized
2
Source tables represented
2
Scope
Past reporting period
Report-row preview from the latest reviewed report for WAILUKU
Substance and testing periodReported valueRange in reportLimit or standardSource tableReport-printed status
NitrateTesting period: 2025 report; the source notes some data may be more than one year old2.5 ppmHighest Detected LevelND - 2.5MCL: 10; MCLG: 10Source Water Monitoring of Regulated ContaminantsPage 18Typical source, as printed: Erosion of natural deposits; runoff from fertilizer use; leaching from septic systemsIn Compliance?: Yes, as printed for this report period
TTHMs (Total trihalomethanes)Testing period: 2025 report; the source notes some data may be more than one year old46 ppbSystem-Wide Highest LRAA5.4 - 46MCL: 80; MCLG: N/ADistribution System Monitoring (Disinfection By-Products)Page 18Typical source, as printed: Disinfection by-productIn Compliance?: Yes, as printed for this report period

Report row

Nitrate

Range in report
ND - 2.5 ppm
Highest Detected Level
2.5 ppm
Testing period
2025 report; the source notes some data may be more than one year old
Sites above action level
Not applicable to this summarized entry
Limit or standard
MCL: 10; MCLG: 10
Report-printed status
In Compliance?: Yes, as printed for this report period

Source · Page 18

Source Water Monitoring of Regulated Contaminants

Typical source, as printed: Erosion of natural deposits; runoff from fertilizer use; leaching from septic systems

Report row

TTHMs (Total trihalomethanes)

Range in report
5.4 - 46 ppb
System-Wide Highest LRAA
46 ppb
Testing period
2025 report; the source notes some data may be more than one year old
Sites above action level
Not applicable to this summarized entry
Limit or standard
MCL: 80; MCLG: N/A
Report-printed status
In Compliance?: Yes, as printed for this report period

Source · Page 18

Distribution System Monitoring (Disinfection By-Products)

Typical source, as printed: Disinfection by-product

Source report notes

Source: County of Maui Department of Water Supply 2025 Wailuku Water System Water Quality Report. Retrieved 2026-07-30.

  • Applies to: Nitrate

    The source prints Yes in the report-period In Compliance? column and notes that some data may be more than one year old. This is reported annual-report evidence. It is not a present-day compliance, advisory, safety, address-level, or household-tap conclusion.

  • Applies to: TTHMs (Total trihalomethanes)

    The source prints Yes in the report-period In Compliance? column and notes that some data may be more than one year old. LRAA is retained as the source's measure. This is reported annual-report evidence. It is not a present-day compliance, advisory, safety, address-level, or household-tap conclusion.

Review the linked source report for definitions, footnotes, and official wording.

Violation Records

Violation records shown on this page

This section shows 0 system-scoped violation detail records currently included for WAILUKU. Annual reports and current notices can use different timing and terminology.

No system-scoped violation detail records are included in the available reviewed records for this system. This is not an official compliance finding. Check the official utility, state, or EPA source for current compliance and notice information.

Important limitation

Profile summary note

This page summarizes public records reviewed by this site. It does not replace official notices, utility updates, or state drinking water information.

System profile limitations

  • The bounded preview shows only Nitrate and Total Trihalomethanes from physical PDF page 18. The source notes that some data may be more than one year old.
  • Address-level service can vary. Confirm the serving provider with a bill, account portal, utility, city, or state source.
  • The linked official department, news, provider, and state pages can change after the July 30, 2026 review. This profile does not claim that no active outage, notice, or advisory exists.
  • Annual-report values describe the source's printed monitoring period and are not a live status feed, household tap result, or safety conclusion. This summarized profile does not replace official utility or state notices.
  • This page shows summarized entries from the available report. It does not include a complete contaminant or violation table.
  • Missing fields are not findings. They mean the field is not shown on this page from the records currently available.
  • This page summarizes available public records. It may not include every update, notice, or urgent official advisory.

Latest Reviewed Report

Latest reviewed report found by this site

The 2025 report found for WAILUKU summarizes a past reporting period. It is not a live alert page.

Utility reportReport data updated:

2025 Wailuku Water System Water Quality Report

Open 2025 water quality report

The 2025 report link is available for WAILUKU. Use the linked source report for the full table, definitions, footnotes, and official context. This page includes summarized entries from the available report. They are not a complete copy of the report table.

Report year
2025
Summarized entries shown
2
Source name
County of Maui Department of Water Supply 2025 Wailuku Water System Water Quality Report
Source URL
Open report source
Source retrieved
2026-07-30
Last reviewed
2026-07-30

Use the linked source report for the full table, definitions, footnotes, and official context.

Data coverage

This page summarizes selected public records for this public water system. It may not include every report, update, current notice, or address-level service detail.

Latest reviewed report
2025 report link found
Report-listed rows
2 summarized report entries shown
Detailed violation records
No detailed system-scoped records displayed
Population served
Not listed in current record
Service connections
Not listed in current record
City context
Kahului
County context
Not listed in current record

Local Context

City and state context for this system

WAILUKU is linked here to Kahului for navigation. That relationship does not confirm the provider for a specific address; use a bill, utility portal, or official lookup source.

Linked local context

Linked communities
Kahului
County context
Not listed in current record
State context
Hawaii

Related Explainers

Related contaminants and guides

Use these explainers with WAILUKU's report year, source table, and official report. Links are limited to existing guide and contaminant pages.

Metals and inorganic chemicals

Nitrate

Nitrate is a regulated inorganic contaminant. Report labels often specify that the result is measured as nitrogen, and that basis must remain attached to the value and unit.

Read the Nitrate contaminant guide

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How to read a water quality report

A plain-English walkthrough of Consumer Confidence Reports, including report years, detected contaminants, legal limits, violations, and source notes.

View How to read a water quality report

Corrections

Suggest a correction or newer source

If you have a newer official report, utility source, or correction, send the source link for review. This helps keep profile summaries tied to public records.

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Evidence

Official sources and report links

Use official federal, state, utility, or report sources before treating a page as final.

Data methodology

Review source hierarchy, missing-data handling, and record limitations.

View Data methodology

Data limitations

See why limited records, missing fields, and current notices need careful interpretation.

View Data limitations