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Community Water System · PWS WA5373230

Roche Harbor Water System Inc

Friday Harbor, Washington 98250 - drinking water served from surface water sources to 1,985 people, tracked in EPA SDWIS and UCMR5.

1,985
People served
1,788
EPA violations
21
Health-based
Untested
UCMR5 result

The verdict

EPA records 1,788 drinking-water violations at Roche Harbor Water System Inc, 1% of them health-based - above the Washington per-system average.

1,788
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
1,985
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Roche Harbor Water System Inc

Roche Harbor Water System Inc is a private-owned community water system that delivers drinking water to 1,985 residents in Friday Harbor, Washington (San Juan County) through 626 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 1,788 total violations for this system , of which 21 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 1,760 monitoring and reporting violations are on file. The most recent violation on record dates to 2019.

The most frequently cited contaminant at this system is 1,2,4-Trichlorobenzene, recorded in 87 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Washington, EPA tracks 4,557 public water systems serving 9,736,844 people, with 314,648 cumulative violations and 20,590 health-based violations on record. About 92% of systems in the state carry at least one violation, and state-wide the average per system is 69 violations. Statewide, 98 of 247 UCMR5-tested systems have reported PFAS detections (39.7%).

Roche Harbor Water System Inc's 1,788 violations sit above the Washington average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
1,985
Total Violations
1,788
Health-Based Violations
21
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
626
County
San Juan
School/Daycare
No
MCL Violations
0
Monitoring Violations
1,760
Treatment Tech Violations
21

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
1,2,4-Trichlorobenzene MR 87 2007
DICHLOROMETHANE MR 87 2007
o-Dichlorobenzene MR 87 2007
p-Dichlorobenzene MR 87 2007
1,1-Dichloroethylene MR 87 2007
1,2-Dichloroethane MR 87 2007
1,1,1-Trichloroethane MR 87 2007
1,1,2-Trichloroethane MR 87 2007
Tetrachloroethylene MR 87 2007
CHLOROBENZENE MR 87 2007
Benzene MR 87 2007
Ethylbenzene MR 87 2007
Styrene MR 87 2007
Vinyl chloride MR 87 2007
Carbon tetrachloride MR 87 2007
1,2-Dichloropropane MR 87 2007
Toluene MR 87 2007
cis-1,2-Dichloroethylene MR 87 2007
trans-1,2-Dichloroethylene MR 87 2007
Trichloroethylene MR 87 2007
Surface Water Treatment Rule TT 21 2010
Surface Water Treatment Rule MR 7 2019
Consumer Confidence Rule Other 3 2013
Nitrate MR 3 2012
Coliform (TCR) MR 2 1997
Arsenic MR 1 1979
Gross Alpha, Excl. Radon and U MR 1 1979
Cadmium MR 1 1979
Barium MR 1 1979
Selenium MR 1 1979

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Roche Harbor Water System Inc.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID WA5373230 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Washington Drinking Water Authority

Washington State Department of Health, Office of Drinking Water is the primacy agency that licenses and inspects Roche Harbor Water System Inc under EPA-delegated authority.

Open WA regulator portal

Source: Washington State Department of Health, Office of Drinking Water

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2019 Surface Water Treatment Rule MR 7 SDWIS / WA5373230 / 0200
2013 Consumer Confidence Rule Other 3 SDWIS / WA5373230 / 7000
2012 Nitrate MR 3 SDWIS / WA5373230 / 1040
2010 Surface Water Treatment Rule TT 21 SDWIS / WA5373230 / 0200
2007 1,2,4-Trichlorobenzene MR 87 SDWIS / WA5373230 / 2378
2007 DICHLOROMETHANE MR 87 SDWIS / WA5373230 / 2964
2007 o-Dichlorobenzene MR 87 SDWIS / WA5373230 / 2968
2007 p-Dichlorobenzene MR 87 SDWIS / WA5373230 / 2969
2007 1,1-Dichloroethylene MR 87 SDWIS / WA5373230 / 2977
2007 1,2-Dichloroethane MR 87 SDWIS / WA5373230 / 2980
2007 1,1,1-Trichloroethane MR 87 SDWIS / WA5373230 / 2981
2007 1,1,2-Trichloroethane MR 87 SDWIS / WA5373230 / 2985
2007 Tetrachloroethylene MR 87 SDWIS / WA5373230 / 2987
2007 CHLOROBENZENE MR 87 SDWIS / WA5373230 / 2989
2007 Benzene MR 87 SDWIS / WA5373230 / 2990

How Roche Harbor Water System Inc Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Roche Harbor Water System Inc Washington avg Federal benchmark
Total violations 1,788 69 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 21 4.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 39.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 1,985 2,137 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 4,557 regulated public water systems in Washington.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Roche Harbor Water System Inc water safe to drink? ▼
Roche Harbor Water System Inc (PWS ID: WA5373230) has 1788 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,985 people using Surface Water sources.
How many people does Roche Harbor Water System Inc serve? ▼
Roche Harbor Water System Inc serves 1,985 people in Friday Harbor, Washington. It is a Private-owned system using Surface Water water sources with 626 service connections.
What type of violations does Roche Harbor Water System Inc have? ▼
Roche Harbor Water System Inc has 1,788 total violations: 21 health-based violations (MCL exceedances or treatment failures), 1,760 monitoring/reporting violations, and 21 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Roche Harbor Water System Inc water? ▼
No PFAS testing data is available for Roche Harbor Water System Inc under the EPA's UCMR5 monitoring program.
What water source does Roche Harbor Water System Inc use? ▼
Roche Harbor Water System Inc uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.