Public water system · WA53SP890
ActiveStuart Is State Park
At a glance
Stuart Is State Park (PWSID WA53SP890) is an active transient non-community water system in San Juan County, Washington. It reports serving 486 people through 5 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list 6 violations for this system; none is health-based, and the most recent began in July 2005.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
486
Service connections
5
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Stuart Is State Park compare with other water systems in San Juan County?
By EPA's size categories, Stuart Is State Park is a very small system (500 people or fewer). San Juan County has 112 active public water systems. Its population served is about 35% above the county average of 361 people per system, and accounts for 1.2% of the 40,377 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 Stuart Is State Park is about 3.4 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 Stuart Is State Park?
EPA lists Stuart Is 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. 9 of the 112 active systems in San Juan County (8%) are also owned by a state government.
Does Stuart Is State Park have drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in July 2005. The violations listed here began between April 1995 and July 2005. By type: 6 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 of them). EPA lists 5 as archived and 1 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 |
|---|---|---|---|---|
| 2005-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 2005-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2004-05-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1997-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1996-09-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1995-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 6 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.
Stuart Is State Park: frequently asked questions
Who runs Stuart Is State Park?
Stuart Is State Park (PWSID WA53SP890) 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 Stuart Is State Park serve?
Stuart Is State Park reports serving 486 people through 5 service connections in San Juan County, Washington.
Where does Stuart Is 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 Stuart Is State Park have any drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in July 2005. 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 Stuart Is 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 6 violations for this system; none is health-based, and the most recent began in July 2005. For current results, consult EPA ECHO, or the WA state drinking water program.
Where can I find Stuart Is State Park's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Stuart Is 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 San Juan County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Moran State Park-Mountain Lake | San Juan | 4,804 | Transient non-community | Surface water |
| Moran State Park - Summit Lake | San Juan | 4,803 | Transient non-community | Groundwater under influence of surface water |
| Moran State Park-Cascade Lake | San Juan | 4,783 | Transient non-community | Surface water |
| Eastsound Water Users Association | San Juan | 3,711 | Community | Surface water |
| Friday Harbor Town of | San Juan | 3,543 | Community | Surface water |
| Limekiln State Park | San Juan | 2,149 | Transient non-community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Stuart Is State Park, PWSID WA53SP890, Washington”, https://aquacensus.com/water-systems/washington/stuart-is-state-park-wa53sp890 (data as of October 1, 2026).