Public water system · WA53SP690
ActivePotholes State Park
At a glance
Potholes State Park (PWSID WA53SP690) is an active transient non-community water system in Grant County, Washington. It reports serving 1,456 people through 81 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list 8 violations for this system; 5 are health-based, and the most recent began in April 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,456
Service connections
81
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Potholes State Park compare with other water systems in Grant County?
By EPA's size categories, Potholes State Park is a small system (501 to 3,300 people). Grant County has 265 active public water systems. Its population served is about 168% above the county average of 543 people per system, and accounts for 1% of the 143,944 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 Potholes State Park is about 10 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 Potholes State Park?
EPA lists Potholes 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. 11 of the 265 active systems in Grant County (4.2%) are also owned by a state government.
Does Potholes State Park have drinking water violations?
EPA's records list 8 violations for this system; 5 are health-based, and the most recent began in April 2021. The violations listed here began between October 1991 and April 2021. By type: 5 contaminant level above the legal limit and 3 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 of them). EPA lists 5 as archived and 3 as resolved. 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. 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 |
|---|---|---|---|---|
| 2021-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2020-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2020-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitratecode 1040 | Yes | Resolved |
| 2003-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 2003-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1999-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1998-02-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1991-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 8 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.
Potholes State Park: frequently asked questions
Who runs Potholes State Park?
Potholes State Park (PWSID WA53SP690) 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 Potholes State Park serve?
Potholes State Park reports serving 1,456 people through 81 service connections in Grant County, Washington.
Where does Potholes 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 Potholes State Park have any drinking water violations?
EPA's records list 8 violations for this system; 5 are health-based, and the most recent began in April 2021. 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 Potholes 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 8 violations for this system; 5 are health-based, and the most recent began in April 2021. For current results, consult EPA ECHO, or the WA state drinking water program.
Where can I find Potholes State Park's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Potholes 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 Grant County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Moses Lake City of | Grant | 32,428 | Community | Groundwater |
| Gorge Amphitheatre | Grant | 25,119 | Transient non-community | Groundwater |
| Ephrata Water Department | Grant | 8,718 | Community | Groundwater |
| Quincy Water Department City of | Grant | 8,415 | Community | Groundwater |
| Mattawa City of | Grant | 5,370 | Community | Groundwater |
| Sun Lakes State Park | Grant | 4,858 | 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, “Potholes State Park, PWSID WA53SP690, Washington”, https://aquacensus.com/water-systems/washington/potholes-state-park-wa53sp690 (data as of October 1, 2026).