Public water system · HI0000130

Active

South Kohala

At a glance

South Kohala (PWSID HI0000130) is an active community water system in Hawaii County, Hawaii. It reports serving 9,612 people through 3,560 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 9 are health-based, and the most recent began in August 2024.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

9,612

Service connections

3,560

Primary source

Surface water

System type

CWS

Community water system

System record

PWSIDHI0000130

System typeCommunity water system

Activity statusActive

Population served9,612

Service connections3,560

Primary water sourceSurface water

Owner typeLocal government

Primacy agencyHI state drinking water program

City servedSouth Kohala

StateHawaii

ZIP—

CountyHawaii County

How does South Kohala compare with other water systems in Hawaii County?

By EPA's size categories, South Kohala is a medium system (3,301 to 10,000 people). Hawaii County has 39 active public water systems, and South Kohala is the 4th-largest of them by population served. Its population served is about 160% above the county average of 3,693 people per system, and accounts for 6.7% 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 South Kohala is about 43% above 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 9 Hawaii systems (6.6%) list surface water as their primary source.

Who owns and regulates South Kohala?

EPA lists South Kohala 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. 23 of the 39 active systems in Hawaii County (59%) are also owned by a local government.

Does South Kohala have drinking water violations?

Of the 12 most recent violations in EPA's records, 9 are health-based, and the most recent began in August 2024. The violations listed here began between October 1999 and August 2024. By type: 9 required treatment not met and 3 monitoring and reporting. The contaminant or rule involved most often is Surface Water Treatment Rule (8 of them). EPA lists 8 as resolved and 4 as archived. 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. 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
2024-08-01	Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38	Interim Enhanced Surface Water Treatment Rulecode 0300	No	Resolved
2013-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Carbon, totalcode 2920	No	Resolved
2007-12-01	Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38	Interim Enhanced Surface Water Treatment Rulecode 0300	No	Archived
2007-08-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Resolved
2007-06-01	Required treatment not metMonthly Turbidity Exceed (Enhanced SWTR) · code 44	Interim Enhanced Surface Water Treatment Rulecode 0300	Yes	Resolved
2006-10-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Archived
2000-03-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Resolved
2000-02-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Resolved
2000-01-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Resolved
1999-12-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Resolved
1999-11-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Archived
1999-10-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Archived

The 12 most recent 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.

South Kohala: frequently asked questions

Who runs South Kohala?

South Kohala (PWSID HI0000130) is a community water system owned by a local government. It is regulated by the HI state drinking water program.

How many people does South Kohala serve?

South Kohala reports serving 9,612 people through 3,560 service connections in Hawaii County, Hawaii.

Where does South Kohala get its water?

EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.

Does South Kohala have any drinking water violations?

Of the 12 most recent violations in EPA's records, 9 are health-based, and the most recent began in August 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 South Kohala'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. Of the 12 most recent violations in EPA's records, 9 are health-based, and the most recent began in August 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 South Kohala's water quality report?

As a community water system, South Kohala 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 Kona	Hawaii	6,512	Community	Groundwater
Olaa-Mountain View	Hawaii	6,467	Community	Groundwater
North Kohala	Hawaii	4,933	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, “South Kohala, PWSID HI0000130, Hawaii”, https://aquacensus.com/water-systems/hawaii/south-kohala-hi0000130 (data as of October 1, 2026).