Public water system · WA53SP975
ActiveWanapum State Park
At a glance
Wanapum State Park (PWSID WA53SP975) is an active transient non-community water system in Kittitas County, Washington. It reports serving 2,263 people through 61 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in November 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,263
Service connections
61
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Wanapum State Park compare with other water systems in Kittitas County?
By EPA's size categories, Wanapum State Park is a small system (501 to 3,300 people). Kittitas County has 96 active public water systems, and Wanapum State Park is the 4th-largest of them by population served. Its population served is about 4.3 times the county average of 528 people per system, and accounts for 4.5% of the 50,703 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 Wanapum State Park is about 16 times 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 Wanapum State Park?
EPA lists Wanapum State Park as owned by a state 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. 7 of the 96 active systems in Kittitas County (7.3%) are also owned by a state government.
Does Wanapum State Park have drinking water violations?
EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in November 2022. The violations listed here began between May 1992 and November 2022. By type: 2 contaminant level above the legal limit, 1 monitoring and 1 monitoring and reporting. The contaminant or rule involved most often is Revised Total Coliform Rule (2 of them). EPA lists 3 as resolved and 1 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 |
|---|---|---|---|---|
| 2022-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, E. coli (RTCR) · code 1A | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2019-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2010-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1992-05-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 4 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.
Wanapum State Park: frequently asked questions
Who runs Wanapum State Park?
Wanapum State Park (PWSID WA53SP975) is a transient non-community water system owned by a state government. It is regulated by the WA state drinking water program.
How many people does Wanapum State Park serve?
Wanapum State Park reports serving 2,263 people through 61 service connections in Kittitas County, Washington.
Where does Wanapum State Park 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 Wanapum State Park have any drinking water violations?
EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in November 2022. 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 Wanapum State Park'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 4 violations for this system; 2 are health-based, and the most recent began in November 2022. For current results, consult EPA ECHO, or the WA state drinking water program.
Where can I find Wanapum State Park's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Wanapum State Park 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 Kittitas County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Ellensburg Water Dept | Kittitas | 20,900 | Community | Groundwater |
| Indian John Rest Area (Eb/Wb) | Kittitas | 5,718 | Transient non-community | Groundwater |
| Suncadia Resort | Kittitas | 2,640 | Community | Purchased surface water |
| Kittitas City of | Kittitas | 2,247 | Community | Groundwater |
| Cle Elum Water Department | Kittitas | 2,213 | Community | Surface water |
| Ryegrass Eb/Wb Rest Area | Kittitas | 2,184 | Transient non-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, “Wanapum State Park, PWSID WA53SP975, Washington”, https://aquacensus.com/water-systems/washington/wanapum-state-park-wa53sp975 (data as of October 1, 2026).