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Community Water System · PWS WA5305350

Belfair Water District 1

Belfair, Washington 98528 - drinking water served from groundwater sources to 4,432 people, tracked in EPA SDWIS and UCMR5.

4,432
People served
151
EPA violations
14
Health-based
Untested
UCMR5 result

The verdict

EPA records 151 drinking-water violations at Belfair Water District 1, 9% of them health-based - above the Washington per-system average.

151
Total EPA violations on record
9%
Health-based (MCL / treatment failure)
4,432
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Belfair Water District 1

Belfair Water District 1 is a local-owned community water system that delivers drinking water to 4,432 residents in Belfair, Washington (Mason County) through 970 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 151 total violations for this system , of which 14 (9%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 136 monitoring and reporting violations are on file. The most recent violation on record dates to 2017.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 14 violations (MCL, health-based). 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%).

Belfair Water District 1's 151 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
4,432
Total Violations
151
Health-Based Violations
14
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
970
County
Mason
School/Daycare
No
MCL Violations
14
Monitoring Violations
136
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 14 2004
Nitrate MR 10 2014
1,2,4-Trichlorobenzene MR 6 2008
cis-1,2-Dichloroethylene MR 6 2008
DICHLOROMETHANE MR 6 2008
o-Dichlorobenzene MR 6 2008
1,2-Dichloroethane MR 6 2008
Trichloroethylene MR 6 2008
1,1,2-Trichloroethane MR 6 2008
Tetrachloroethylene MR 6 2008
CHLOROBENZENE MR 6 2008
Benzene MR 6 2008
Toluene MR 6 2008
Ethylbenzene MR 6 2008
1,1,1-Trichloroethane MR 6 2008
Carbon tetrachloride MR 6 2008
Styrene MR 6 2008
1,1-Dichloroethylene MR 6 2008
trans-1,2-Dichloroethylene MR 6 2008
1,2-Dichloropropane MR 6 2008
p-Dichlorobenzene MR 6 2008
Vinyl chloride MR 6 2008
Coliform (TCR) MR 4 1993
Revised Total Coliform Rule MON 1 2017
Gross Alpha, Excl. Radon and U MR 1 1979
Consumer Confidence Rule Other 1 2012

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 Belfair Water District 1.

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 WA5305350 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 Belfair Water District 1 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
2017 Revised Total Coliform Rule MON 1 SDWIS / WA5305350 / 8000
2014 Nitrate MR 10 SDWIS / WA5305350 / 1040
2012 Consumer Confidence Rule Other 1 SDWIS / WA5305350 / 7000
2008 1,2,4-Trichlorobenzene MR 6 SDWIS / WA5305350 / 2378
2008 cis-1,2-Dichloroethylene MR 6 SDWIS / WA5305350 / 2380
2008 DICHLOROMETHANE MR 6 SDWIS / WA5305350 / 2964
2008 o-Dichlorobenzene MR 6 SDWIS / WA5305350 / 2968
2008 1,2-Dichloroethane MR 6 SDWIS / WA5305350 / 2980
2008 Trichloroethylene MR 6 SDWIS / WA5305350 / 2984
2008 1,1,2-Trichloroethane MR 6 SDWIS / WA5305350 / 2985
2008 Tetrachloroethylene MR 6 SDWIS / WA5305350 / 2987
2008 CHLOROBENZENE MR 6 SDWIS / WA5305350 / 2989
2008 Benzene MR 6 SDWIS / WA5305350 / 2990
2008 Toluene MR 6 SDWIS / WA5305350 / 2991
2008 Ethylbenzene MR 6 SDWIS / WA5305350 / 2992

How Belfair Water District 1 Compares

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

Metric Belfair Water District 1 Washington avg Federal benchmark
Total violations 151 69 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 14 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 4,432 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 Belfair Water District 1 water safe to drink? ▼
Belfair Water District 1 (PWS ID: WA5305350) has 151 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 4,432 people using Groundwater sources.
How many people does Belfair Water District 1 serve? ▼
Belfair Water District 1 serves 4,432 people in Belfair, Washington. It is a Local-owned system using Groundwater water sources with 970 service connections.
What type of violations does Belfair Water District 1 have? ▼
Belfair Water District 1 has 151 total violations: 14 health-based violations (MCL exceedances or treatment failures), 136 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Belfair Water District 1 water? ▼
No PFAS testing data is available for Belfair Water District 1 under the EPA's UCMR5 monitoring program.
What water source does Belfair Water District 1 use? ▼
Belfair Water District 1 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.