Public water system · HI0000254
ActiveMaunaolu Plantation
At a glance
Maunaolu Plantation (PWSID HI0000254) is an active community water system in Maui County, Hawaii. It reports serving 100 people through 37 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
100
Service connections
37
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Maunaolu Plantation compare with other water systems in Maui County?
By EPA's size categories, Maunaolu Plantation is a very small system (500 people or fewer). 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 less than 0.1% 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 Maunaolu Plantation 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 Maunaolu Plantation?
EPA lists Maunaolu Plantation 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 Maunaolu Plantation have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Maunaolu Plantation. For the latest compliance status, check EPA ECHO for current compliance history.
Maunaolu Plantation: frequently asked questions
Who runs Maunaolu Plantation?
Maunaolu Plantation (PWSID HI0000254) is a community water system privately owned. It is regulated by the HI state drinking water program.
How many people does Maunaolu Plantation serve?
Maunaolu Plantation reports serving 100 people through 37 service connections in Maui County, Hawaii.
Where does Maunaolu Plantation 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 Maunaolu Plantation have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Maunaolu Plantation'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 Safe Drinking Water Act records list no violations for this system. For current results, consult the system's annual water quality report, EPA ECHO, or the HI state drinking water program.
Where can I find Maunaolu Plantation's water quality report?
As a community water system, Maunaolu Plantation 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, “Maunaolu Plantation, PWSID HI0000254, Hawaii”, https://aquacensus.com/water-systems/hawaii/maunaolu-plantation-hi0000254 (data as of October 1, 2026).