Public water system · HI0000222
ActiveHaleakala National Park
At a glance
Haleakala National Park (PWSID HI0000222) is an active community water system in Maui County, Hawaii. It reports serving 1,200 people through 17 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal 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
1,200
Service connections
17
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Haleakala National Park compare with other water systems in Maui County?
By EPA's size categories, Haleakala National Park is a small system (501 to 3,300 people). Maui County has 39 active public water systems. Its population served is well below the county average of 4,338 people per system, and accounts for 0.7% 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 Haleakala National Park 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 Haleakala National Park?
EPA lists Haleakala National Park as owned by the federal 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. 3 of the 39 active systems in Maui County (7.7%) are also owned by the federal government.
Does Haleakala National Park 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.
Haleakala National Park: frequently asked questions
Who runs Haleakala National Park?
Haleakala National Park (PWSID HI0000222) is a community water system owned by the federal government. It is regulated by the HI state drinking water program.
How many people does Haleakala National Park serve?
Haleakala National Park reports serving 1,200 people through 17 service connections in Maui County, Hawaii.
Where does Haleakala National Park 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 Haleakala National Park 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 Haleakala National Park'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 Haleakala National Park's water quality report?
As a community water system, Haleakala National Park 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
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, “Haleakala National Park, PWSID HI0000222, Hawaii”, https://aquacensus.com/water-systems/hawaii/haleakala-national-park-hi0000222 (data as of October 1, 2026).