Public water system · WA53SP540
ActiveMoran State Park-Cascade Lake
At a glance
Moran State Park-Cascade Lake (PWSID WA53SP540) is an active transient non-community water system in San Juan County, Washington. It reports serving 4,783 people through 37 service connections. Its primary water source is surface water, and EPA lists it as owned by a state government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
4,783
Service connections
37
Primary source
SW
Surface water
System type
TNCWS
Transient non-community water system
System record
How does Moran State Park-Cascade Lake compare with other water systems in San Juan County?
By EPA's size categories, Moran State Park-Cascade Lake is a medium system (3,301 to 10,000 people). San Juan County has 112 active public water systems, and Moran State Park-Cascade Lake is the 3rd-largest of them by population served. Its population served is about 13 times the county average of 361 people per system, and accounts for 12% 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 Moran State Park-Cascade Lake is about 33 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 140 Washington systems (3%) list surface water as their primary source.
Who owns and regulates Moran State Park-Cascade Lake?
EPA lists Moran State Park-Cascade Lake 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 Moran State Park-Cascade Lake have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2022. The violations listed here began between December 1992 and January 2022. By type: 11 monitoring and reporting and 1 required treatment not met. The contaminant or rule involved most often is Surface Water Treatment Rule (9 of them). EPA lists 10 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 |
|---|---|---|---|---|
| 2022-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2007-12-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Archived |
| 2007-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2006-09-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Surface Water Treatment Rulecode 0200 | No | Archived |
| 2006-06-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Surface Water Treatment Rulecode 0200 | No | Archived |
| 2005-06-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Surface Water Treatment Rulecode 0200 | No | Archived |
| 2004-09-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Archived |
| 2004-06-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Archived |
| 1998-11-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Archived |
| 1996-11-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Archived |
| 1996-10-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Archived |
| 1992-12-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
The 12 most recent 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.
Moran State Park-Cascade Lake: frequently asked questions
Who runs Moran State Park-Cascade Lake?
Moran State Park-Cascade Lake (PWSID WA53SP540) 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 Moran State Park-Cascade Lake serve?
Moran State Park-Cascade Lake reports serving 4,783 people through 37 service connections in San Juan County, Washington.
Where does Moran State Park-Cascade Lake get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Moran State Park-Cascade Lake have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 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 Moran State Park-Cascade Lake'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. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2022. For current results, consult EPA ECHO, or the WA state drinking water program.
Where can I find Moran State Park-Cascade Lake's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Moran State Park-Cascade Lake 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 |
| 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 |
| Roche Harbor Water System Inc. | San Juan | 2,091 | Community | Surface water |
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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, “Moran State Park-Cascade Lake, PWSID WA53SP540, Washington”, https://aquacensus.com/water-systems/washington/moran-state-park-cascade-lake-wa53sp540 (data as of October 1, 2026).