Public water system · HI0000205
ActiveKaanapali
At a glance
Kaanapali (PWSID HI0000205) is an active community water system in Maui County, Hawaii. It reports serving 8,000 people through 700 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 6 violations for this system; 3 are health-based, and the most recent began in December 1992.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
8,000
Service connections
700
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Kaanapali compare with other water systems in Maui County?
By EPA's size categories, Kaanapali is a medium system (3,301 to 10,000 people). Maui County has 39 active public water systems, and Kaanapali is the 4th-largest of them by population served. Its population served is about 84% above the county average of 4,338 people per system, and accounts for 4.7% of the 169,182 people reported by systems filed under the county. Across Hawaii, the 136 active systems average 11,181 people each. Nationally, the average active community water system reports serving 6,703 people, so Kaanapali is about 19% above that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Hawaii has 119 active community water systems, 88% of the state's 136 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 112 Hawaii systems (82%) list groundwater as their primary source.
Who owns and regulates Kaanapali?
EPA lists Kaanapali as privately owned. The HI state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 22 of the 39 active systems in Maui County (56%) are also privately owned.
Does Kaanapali have drinking water violations?
EPA's records list 6 violations for this system; 3 are health-based, and the most recent began in December 1992. The violations listed here began between June 1981 and December 1992. By type: 3 contaminant level above the legal limit, 2 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 4 as archived and 2 as resolved. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 1992-12-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1992-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1992-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1992-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1991-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1981-06-30 | Public notice, recordkeeping or otherNotification, Public · code 06 | Total coliform bacteria (pre-TCR)code 3000 | No | Archived |
All 6 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Kaanapali: frequently asked questions
Who runs Kaanapali?
Kaanapali (PWSID HI0000205) is a community water system privately owned. It is regulated by the HI state drinking water program.
How many people does Kaanapali serve?
Kaanapali reports serving 8,000 people through 700 service connections in Maui County, Hawaii.
Where does Kaanapali get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Kaanapali have any drinking water violations?
EPA's records list 6 violations for this system; 3 are health-based, and the most recent began in December 1992. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Kaanapali's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 6 violations for this system; 3 are health-based, and the most recent began in December 1992. For current results, consult the system's annual water quality report, EPA ECHO, or the HI state drinking water program.
Where can I find Kaanapali's water quality report?
As a community water system, Kaanapali must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Maui County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Wailuku | Maui | 74,511 | Community | Surface water |
| Makawao | Maui | 29,868 | Community | Surface water |
| Lahaina | Maui | 20,065 | Community | Surface water |
| Upper Kula | Maui | 7,686 | Community | Surface water |
| Kapalua | Maui | 4,200 | Community | Groundwater |
| Kaunakakai | Maui | 3,702 | Community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Kaanapali, PWSID HI0000205, Hawaii”, https://aquacensus.com/water-systems/hawaii/kaanapali-hi0000205 (data as of October 1, 2026).