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Community Water System · PWS WA5375800

San Juan Vista

Sekiu, Washington 98381-9724 - drinking water served from groundwater sources to 94 people, tracked in EPA SDWIS and UCMR5.

94
People served
133
EPA violations
3
Health-based
Untested
UCMR5 result

The verdict

EPA records 133 drinking-water violations at San Juan Vista, 2% of them health-based - above the Washington per-system average.

133
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
94
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: San Juan Vista

San Juan Vista is a private-owned community water system that delivers drinking water to 94 residents in Sekiu, Washington (Clallam County) through 30 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 133 total violations for this system , of which 3 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 117 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Consumer Confidence Rule, recorded in 9 violations (Other). 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%).

San Juan Vista's 133 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
94
Total Violations
133
Health-Based Violations
3
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
30
County
Clallam
School/Daycare
No
MCL Violations
3
Monitoring Violations
117
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Consumer Confidence Rule Other 9 2021
Nitrate MR 6 2019
Coliform (TCR) MR 4 2015
1,2,4-Trichlorobenzene MR 4 2017
cis-1,2-Dichloroethylene MR 4 2017
DICHLOROMETHANE MR 4 2017
Vinyl chloride MR 4 2017
Carbon tetrachloride MR 4 2017
1,2-Dichloropropane MR 4 2017
1,1,2-Trichloroethane MR 4 2017
Styrene MR 4 2017
o-Dichlorobenzene MR 4 2017
trans-1,2-Dichloroethylene MR 4 2017
CHLOROBENZENE MR 4 2017
1,1-Dichloroethylene MR 4 2017
Trichloroethylene MR 4 2017
Toluene MR 4 2017
Ethylbenzene MR 4 2017
1,2-Dichloroethane MR 4 2017
1,1,1-Trichloroethane MR 4 2017
Benzene MR 4 2017
Lead and Copper Rule MR 4 2020
p-Dichlorobenzene MR 4 2017
Tetrachloroethylene MR 4 2017
Coliform (TCR) MCL 3 1998
Arsenic MR 2 2011
Barium MR 2 2011
Fluoride MR 2 2011
Mercury MR 2 2011
Revised Total Coliform Rule MON 2 2018

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 San Juan Vista.

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 WA5375800 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 San Juan Vista 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
2021 Consumer Confidence Rule Other 9 SDWIS / WA5375800 / 7000
2020 Lead and Copper Rule MR 4 SDWIS / WA5375800 / 5000
2019 Nitrate MR 6 SDWIS / WA5375800 / 1040
2018 Revised Total Coliform Rule MON 2 SDWIS / WA5375800 / 8000
2017 1,2,4-Trichlorobenzene MR 4 SDWIS / WA5375800 / 2378
2017 cis-1,2-Dichloroethylene MR 4 SDWIS / WA5375800 / 2380
2017 DICHLOROMETHANE MR 4 SDWIS / WA5375800 / 2964
2017 Vinyl chloride MR 4 SDWIS / WA5375800 / 2976
2017 Carbon tetrachloride MR 4 SDWIS / WA5375800 / 2982
2017 1,2-Dichloropropane MR 4 SDWIS / WA5375800 / 2983
2017 1,1,2-Trichloroethane MR 4 SDWIS / WA5375800 / 2985
2017 Styrene MR 4 SDWIS / WA5375800 / 2996
2017 o-Dichlorobenzene MR 4 SDWIS / WA5375800 / 2968
2017 trans-1,2-Dichloroethylene MR 4 SDWIS / WA5375800 / 2979
2017 CHLOROBENZENE MR 4 SDWIS / WA5375800 / 2989

How San Juan Vista Compares

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

Metric San Juan Vista Washington avg Federal benchmark
Total violations 133 69 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 3 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 94 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 San Juan Vista water safe to drink? ▼
San Juan Vista (PWS ID: WA5375800) has 133 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 94 people using Groundwater sources.
How many people does San Juan Vista serve? ▼
San Juan Vista serves 94 people in Sekiu, Washington. It is a Private-owned system using Groundwater water sources with 30 service connections.
What type of violations does San Juan Vista have? ▼
San Juan Vista has 133 total violations: 3 health-based violations (MCL exceedances or treatment failures), 117 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in San Juan Vista water? ▼
No PFAS testing data is available for San Juan Vista under the EPA's UCMR5 monitoring program.
What water source does San Juan Vista use? ▼
San Juan Vista uses Groundwater 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.