Public water system · WA5364681
ActiveSucia Island St Park-Shallow Bay
At a glance
Sucia Island St Park-Shallow Bay (PWSID WA5364681) is an active transient non-community water system in San Juan County, Washington. It reports serving 757 people through 3 service connections. Its primary water source is groundwater under influence of surface water, and EPA lists it as owned by a state government. EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in July 2013.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
757
Service connections
3
Primary source
GU
Groundwater under influence of surface water
System type
TNCWS
Transient non-community water system
System record
How does Sucia Island St Park-Shallow Bay compare with other water systems in San Juan County?
By EPA's size categories, Sucia Island St Park-Shallow Bay is a small system (501 to 3,300 people). San Juan County has 112 active public water systems. Its population served is about twice the county average of 361 people per system, and accounts for 1.9% 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 Sucia Island St Park-Shallow Bay is about 5.3 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 under the influence of surface water is well or spring water that the regulator has found to be affected by nearby surface water, so it is regulated under the surface-water treatment rules. 9 Washington systems (0.2%) list groundwater under influence of surface water as their primary source.
Who owns and regulates Sucia Island St Park-Shallow Bay?
EPA lists Sucia Island St Park-Shallow Bay 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 Sucia Island St Park-Shallow Bay have drinking water violations?
EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in July 2013. The violations listed here began between April 1999 and July 2013. By type: 5 monitoring and reporting and 2 required treatment not met. The contaminant or rule involved most often is Surface Water Treatment Rule (6 of them). EPA lists 5 as archived and 2 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 |
|---|---|---|---|---|
| 2013-07-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2011-06-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 2009-05-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Surface Water Treatment Rulecode 0200 | No | Archived |
| 2007-06-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Surface Water Treatment Rulecode 0200 | No | Archived |
| 2007-04-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Surface Water Treatment Rulecode 0200 | No | Archived |
| 2000-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1999-04-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Archived |
All 7 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.
Sucia Island St Park-Shallow Bay: frequently asked questions
Who runs Sucia Island St Park-Shallow Bay?
Sucia Island St Park-Shallow Bay (PWSID WA5364681) 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 Sucia Island St Park-Shallow Bay serve?
Sucia Island St Park-Shallow Bay reports serving 757 people through 3 service connections in San Juan County, Washington.
Where does Sucia Island St Park-Shallow Bay get its water?
EPA SDWIS lists this system's primary water source as groundwater under influence of surface water. Groundwater under the influence of surface water is well or spring water that the regulator has found to be affected by nearby surface water, so it is regulated under the surface-water treatment rules.
Does Sucia Island St Park-Shallow Bay have any drinking water violations?
EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in July 2013. 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 Sucia Island St Park-Shallow Bay'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 7 violations for this system; 2 are health-based, and the most recent began in July 2013. For current results, consult EPA ECHO, or the WA state drinking water program.
Where can I find Sucia Island St Park-Shallow Bay's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Sucia Island St Park-Shallow Bay 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 |
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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, “Sucia Island St Park-Shallow Bay, PWSID WA5364681, Washington”, https://aquacensus.com/water-systems/washington/sucia-island-st-park-shallow-bay-wa5364681 (data as of October 1, 2026).