Public water system · WA5307903
ActiveHorn Rapids Park Water System
At a glance
Horn Rapids Park Water System (PWSID WA5307903) is an active transient non-community water system in Benton County, Washington. It reports serving 20 people through 22 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 2 violations for this system; none is health-based, and the most recent began in September 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
20
Service connections
22
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Horn Rapids Park Water System compare with other water systems in Benton County?
By EPA's size categories, Horn Rapids Park Water System is a very small system (500 people or fewer). 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 less than 0.1% 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 transient non-community water system reports serving 144 people, so Horn Rapids Park Water System is well below that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Washington has 1,913 active transient non-community water systems, 41% 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 Horn Rapids Park Water System?
EPA lists Horn Rapids Park Water System as owned by a local government. 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. 13 of the 108 active systems in Benton County (12%) are also owned by a local government.
Does Horn Rapids Park Water System have drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in September 2025. The violations listed here began between January 2010 and September 2025. By type: 1 monitoring and 1 monitoring and reporting. The contaminants or rules involved are Revised Total Coliform Rule and Nitrate. EPA lists 2 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 |
|---|---|---|---|---|
| 2025-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2010-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
All 2 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.
Horn Rapids Park Water System: frequently asked questions
Who runs Horn Rapids Park Water System?
Horn Rapids Park Water System (PWSID WA5307903) is a transient non-community water system owned by a local government. It is regulated by the WA state drinking water program.
How many people does Horn Rapids Park Water System serve?
Horn Rapids Park Water System reports serving 20 people through 22 service connections in Benton County, Washington.
Where does Horn Rapids Park Water System 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 Horn Rapids Park Water System have any drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in September 2025. 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 Horn Rapids Park Water System'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 2 violations for this system; none is health-based, and the most recent began in September 2025. For current results, consult EPA ECHO, or the WA state drinking water program.
Where can I find Horn Rapids Park Water System's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Horn Rapids Park Water System is a transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
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, “Horn Rapids Park Water System, PWSID WA5307903, Washington”, https://aquacensus.com/water-systems/washington/horn-rapids-park-water-system-wa5307903 (data as of October 1, 2026).