Public water system · HI0000201
ActiveHana Water Systems - South
At a glance
Hana Water Systems - South (PWSID HI0000201) is an active community water system in Maui County, Hawaii. It reports serving 816 people through 81 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 7 violations for this system; 1 is health-based, and the most recent began in January 2000.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
816
Service connections
81
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Hana Water Systems - South compare with other water systems in Maui County?
By EPA's size categories, Hana Water Systems - South 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 0.5% 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 Hana Water Systems - South 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 Hana Water Systems - South?
EPA lists Hana Water Systems - South 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 Hana Water Systems - South have drinking water violations?
EPA's records list 7 violations for this system; 1 is health-based, and the most recent began in January 2000. The violations listed here began between December 1980 and January 2000. By type: 5 public notice, recordkeeping or other, 1 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (pre-TCR) (5 of them). EPA lists 7 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 |
| 1996-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1987-09-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Total coliform bacteria (pre-TCR)code 3000 | No | Archived |
| 1983-06-30 | Public notice, recordkeeping or otherNotification, Public · code 06 | Total coliform bacteria (pre-TCR)code 3000 | No | Archived |
| 1981-06-30 | Public notice, recordkeeping or otherNotification, Public · code 06 | Total coliform bacteria (pre-TCR)code 3000 | No | Archived |
| 1981-03-31 | Public notice, recordkeeping or otherNotification, Public · code 06 | Total coliform bacteria (pre-TCR)code 3000 | No | Archived |
| 1980-12-31 | Public notice, recordkeeping or otherNotification, Public · code 06 | Total coliform bacteria (pre-TCR)code 3000 | No | Archived |
All 7 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.
Hana Water Systems - South: frequently asked questions
Who runs Hana Water Systems - South?
Hana Water Systems - South (PWSID HI0000201) is a community water system privately owned. It is regulated by the HI state drinking water program.
How many people does Hana Water Systems - South serve?
Hana Water Systems - South reports serving 816 people through 81 service connections in Maui County, Hawaii.
Where does Hana Water Systems - South 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 Hana Water Systems - South have any drinking water violations?
EPA's records list 7 violations for this system; 1 is 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 Hana Water Systems - South'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 7 violations for this system; 1 is 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 Hana Water Systems - South's water quality report?
As a community water system, Hana Water Systems - South 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
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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, “Hana Water Systems - South, PWSID HI0000201, Hawaii”, https://aquacensus.com/water-systems/hawaii/hana-water-systems-south-hi0000201 (data as of October 1, 2026).