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Community Water System · PWS WA5344150

Lake Limerick Water

Shelton, Washington 98584 - drinking water served from groundwater sources to 2,148 people, tracked in EPA SDWIS and UCMR5.

2,148
People served
422
EPA violations
3
Health-based
Untested
UCMR5 result

The verdict

EPA records 422 drinking-water violations at Lake Limerick Water, 1% of them health-based - above the Washington per-system average.

422
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
2,148
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Lake Limerick Water

Lake Limerick Water is a private-owned community water system that delivers drinking water to 2,148 residents in Shelton, Washington (Mason County) through 1,201 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 422 total violations for this system , of which 3 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 416 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is 1,2,4-Trichlorobenzene, recorded in 20 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%).

Lake Limerick Water's 422 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
2,148
Total Violations
422
Health-Based Violations
3
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
1,201
County
Mason
School/Daycare
No
MCL Violations
3
Monitoring Violations
416
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
1,2,4-Trichlorobenzene MR 20 2008
DICHLOROMETHANE MR 20 2008
o-Dichlorobenzene MR 20 2008
Vinyl chloride MR 20 2008
1,1-Dichloroethylene MR 20 2008
1,2-Dichloroethane MR 20 2008
1,1,1-Trichloroethane MR 20 2008
Carbon tetrachloride MR 20 2008
1,2-Dichloropropane MR 20 2008
Trichloroethylene MR 20 2008
Tetrachloroethylene MR 20 2008
CHLOROBENZENE MR 20 2008
Benzene MR 20 2008
Toluene MR 20 2008
Styrene MR 20 2008
p-Dichlorobenzene MR 20 2008
trans-1,2-Dichloroethylene MR 20 2008
1,1,2-Trichloroethane MR 20 2008
Ethylbenzene MR 20 2008
cis-1,2-Dichloroethylene MR 20 2008
Coliform (TCR) MR 4 2000
Consumer Confidence Rule Other 3 2024
Coliform (TCR) MCL 3 2006
Revised Total Coliform Rule MON 2 2022
Nitrate MR 2 2020
Barium MR 1 1979
Arsenic MR 1 1979
Mercury MR 1 1979
Cadmium MR 1 1979
Chromium 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 Lake Limerick Water.

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 WA5344150 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 Lake Limerick Water 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
2024 Consumer Confidence Rule Other 3 SDWIS / WA5344150 / 7000
2022 Revised Total Coliform Rule MON 2 SDWIS / WA5344150 / 8000
2020 Nitrate MR 2 SDWIS / WA5344150 / 1040
2008 1,2,4-Trichlorobenzene MR 20 SDWIS / WA5344150 / 2378
2008 DICHLOROMETHANE MR 20 SDWIS / WA5344150 / 2964
2008 o-Dichlorobenzene MR 20 SDWIS / WA5344150 / 2968
2008 Vinyl chloride MR 20 SDWIS / WA5344150 / 2976
2008 1,1-Dichloroethylene MR 20 SDWIS / WA5344150 / 2977
2008 1,2-Dichloroethane MR 20 SDWIS / WA5344150 / 2980
2008 1,1,1-Trichloroethane MR 20 SDWIS / WA5344150 / 2981
2008 Carbon tetrachloride MR 20 SDWIS / WA5344150 / 2982
2008 1,2-Dichloropropane MR 20 SDWIS / WA5344150 / 2983
2008 Trichloroethylene MR 20 SDWIS / WA5344150 / 2984
2008 Tetrachloroethylene MR 20 SDWIS / WA5344150 / 2987
2008 CHLOROBENZENE MR 20 SDWIS / WA5344150 / 2989

How Lake Limerick Water Compares

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

Metric Lake Limerick Water Washington avg Federal benchmark
Total violations 422 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 2,148 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 Lake Limerick Water water safe to drink? ▼
Lake Limerick Water (PWS ID: WA5344150) has 422 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 2,148 people using Groundwater sources.
How many people does Lake Limerick Water serve? ▼
Lake Limerick Water serves 2,148 people in Shelton, Washington. It is a Private-owned system using Groundwater water sources with 1,201 service connections.
What type of violations does Lake Limerick Water have? ▼
Lake Limerick Water has 422 total violations: 3 health-based violations (MCL exceedances or treatment failures), 416 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Lake Limerick Water water? ▼
No PFAS testing data is available for Lake Limerick Water under the EPA's UCMR5 monitoring program.
What water source does Lake Limerick Water use? ▼
Lake Limerick Water 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.