Public water system · HI0000168
ActiveKeopu Water Association
At a glance
Keopu Water Association (PWSID HI0000168) is an active community water system in Hawaii County, Hawaii. It reports serving 250 people through 51 service connections. Its primary water source is purchased groundwater, and EPA lists it as privately owned. EPA's records list one violation for this system; it is health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
250
Service connections
51
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Keopu Water Association compare with other water systems in Hawaii County?
By EPA's size categories, Keopu Water Association is a very small system (500 people or fewer). Hawaii County has 39 active public water systems. Its population served is well below the county average of 3,693 people per system, and accounts for 0.2% of the 144,021 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 Keopu Water Association 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. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 14 Hawaii systems (10%) list purchased groundwater as their primary source.
Who owns and regulates Keopu Water Association?
EPA lists Keopu Water Association 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. 13 of the 39 active systems in Hawaii County (33%) are also privately owned.
Does Keopu Water Association have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in October 2024. By type: 1 required treatment not met. The contaminant or rule involved is Lead and Copper Rule Revisions. EPA lists 1 as resolved. 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 |
|---|---|---|---|---|
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Resolved |
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.
Keopu Water Association: frequently asked questions
Who runs Keopu Water Association?
Keopu Water Association (PWSID HI0000168) is a community water system privately owned. It is regulated by the HI state drinking water program.
How many people does Keopu Water Association serve?
Keopu Water Association reports serving 250 people through 51 service connections in Hawaii County, Hawaii.
Where does Keopu Water Association get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does Keopu Water Association have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in October 2024. 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 Keopu Water Association'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 health-based, and the most recent began in October 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the HI state drinking water program.
Where can I find Keopu Water Association's water quality report?
As a community water system, Keopu Water Association 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 Hawaii County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Hilo | Hawaii | 39,477 | Community | Groundwater |
| North Kona | Hawaii | 29,581 | Community | Groundwater |
| Waikoloa | Hawaii | 12,100 | Community | Groundwater |
| South Kohala | Hawaii | 9,612 | Community | Surface water |
| South Kona | Hawaii | 6,512 | Community | Groundwater |
| Olaa-Mountain View | Hawaii | 6,467 | 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, “Keopu Water Association, PWSID HI0000168, Hawaii”, https://aquacensus.com/water-systems/hawaii/keopu-water-association-hi0000168 (data as of October 1, 2026).