Public water system · HI0000403
ActiveHanalei
At a glance
Hanalei (PWSID HI0000403) is an active community water system in Kauai County, Hawaii. It reports serving 500 people through 404 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2000.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
500
Service connections
404
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Hanalei compare with other water systems in Kauai County?
By EPA's size categories, Hanalei is a very small system (500 people or fewer). Kauai County has 19 active public water systems. Its population served is well below the county average of 4,167 people per system, and accounts for 0.6% of the 79,166 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 Hanalei is well below 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 Hanalei?
EPA lists Hanalei as owned by a local government. 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. 9 of the 19 active systems in Kauai County (47%) are also owned by a local government.
Does Hanalei have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2000. By type: 1 monitoring and reporting. The contaminant or rule involved is Gross alpha (excluding radon and uranium). EPA lists 1 as archived. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2000-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
The one violation in EPA's records.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.
Hanalei: frequently asked questions
Who runs Hanalei?
Hanalei (PWSID HI0000403) is a community water system owned by a local government. It is regulated by the HI state drinking water program.
How many people does Hanalei serve?
Hanalei reports serving 500 people through 404 service connections in Kauai County, Hawaii.
Where does Hanalei 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 Hanalei have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2000. 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 Hanalei'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 one violation for this system; it is not health-based, and the most recent began in January 2000. For current results, consult the system's annual water quality report, EPA ECHO, or the HI state drinking water program.
Where can I find Hanalei's water quality report?
As a community water system, Hanalei 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 Kauai County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Lihue-Kapaa | Kauai | 34,854 | Community | Surface water |
| Kalaheo-Koloa | Kauai | 12,660 | Community | Groundwater |
| Princeville | Kauai | 6,911 | Community | Groundwater |
| Kekaha-Waimea | Kauai | 5,998 | Community | Groundwater |
| Hanapepe-Eleele | Kauai | 5,592 | Community | Groundwater |
| Kilauea | Kauai | 3,420 | Community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Hanalei, PWSID HI0000403, Hawaii”, https://aquacensus.com/water-systems/hawaii/hanalei-hi0000403 (data as of October 1, 2026).