Public water system · WA5310724
ActiveGreat Basin Water Kiona
At a glance
Great Basin Water Kiona (PWSID WA5310724) is an active community water system in Benton County, Washington. It reports serving 520 people through 221 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in September 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
520
Service connections
221
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Great Basin Water Kiona compare with other water systems in Benton County?
By EPA's size categories, Great Basin Water Kiona is a small system (501 to 3,300 people). Benton County has 108 active public water systems. Its population served is well below the county average of 2,712 people per system, and accounts for 0.2% of the 292,896 people reported by systems filed under the county. Across Washington, the 4,705 active systems average 2,172 people each. Nationally, the average active community water system reports serving 6,703 people, so Great Basin Water Kiona 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. Washington has 2,392 active community water systems, 51% of the state's 4,705 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 4,370 Washington systems (93%) list groundwater as their primary source.
Who owns and regulates Great Basin Water Kiona?
EPA lists Great Basin Water Kiona as privately owned. The WA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 85 of the 108 active systems in Benton County (79%) are also privately owned.
Does Great Basin Water Kiona have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in September 2023. The violations listed here began between January 2021 and September 2023. By type: 11 monitoring and reporting and 1 monitoring. The contaminants or rules involved are Revised Total Coliform Rule, o-Dichlorobenzene, Benzene and Toluene. EPA lists 12 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 |
|---|---|---|---|---|
| 2023-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | o-Dichlorobenzenecode 2968 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toluenecode 2991 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dichloromethanecode 2964 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,2-Trichloroethanecode 2985 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Trichloroethylenecode 2984 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlorobenzenecode 2989 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1-Dichloroethylenecode 2977 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloropropanecode 2983 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | cis-1,2-Dichloroethylenecode 2380 | No | Resolved |
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.
Great Basin Water Kiona: frequently asked questions
Who runs Great Basin Water Kiona?
Great Basin Water Kiona (PWSID WA5310724) is a community water system privately owned. It is regulated by the WA state drinking water program.
How many people does Great Basin Water Kiona serve?
Great Basin Water Kiona reports serving 520 people through 221 service connections in Benton County, Washington.
Where does Great Basin Water Kiona 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 Great Basin Water Kiona have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in September 2023. 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 Great Basin Water Kiona'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, none is health-based, and the most recent began in September 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the WA state drinking water program.
Where can I find Great Basin Water Kiona's water quality report?
As a community water system, Great Basin Water Kiona 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 Benton County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Kennewick City of | Benton | 118,164 | Community | Surface water |
| Richland City of | Benton | 106,499 | Community | Surface water |
| West Richland City of | Benton | 21,231 | Community | Purchased surface water |
| Prosser City of | Benton | 12,070 | Community | Groundwater |
| Energy Dept of/200w | Benton | 6,351 | Non-transient non-community | Surface water |
| Benton City Water | Benton | 5,626 | 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, “Great Basin Water Kiona, PWSID WA5310724, Washington”, https://aquacensus.com/water-systems/washington/great-basin-water-kiona-wa5310724 (data as of October 1, 2026).