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Community Water System · PWS WA5340950

Lake Forest Park Water District

Lake Forest Park, Washington 98155 - drinking water served from groundwater sources to 3,171 people, tracked in EPA SDWIS and UCMR5.

3,171
People served
9,527
EPA violations
15
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 9,527 drinking-water violations at Lake Forest Park Water District - above the Washington per-system average.

9,527
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
3,171
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Lake Forest Park Water District

Lake Forest Park Water District is a local-owned community water system that delivers drinking water to 3,171 residents in Lake Forest Park, Washington (King County) through 908 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 9,527 total violations for this system , of which 15 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 9,510 monitoring and reporting violations are on file. The most recent violation on record dates to 2014.

The most frequently cited contaminant at this system is 1,2,4-Trichlorobenzene, recorded in 475 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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 Forest Park Water District's 9,527 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
3,171
Total Violations
9,527
Health-Based Violations
15
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
908
County
King
School/Daycare
No
MCL Violations
15
Monitoring Violations
9,510
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
1,2,4-Trichlorobenzene MR 475 2005
cis-1,2-Dichloroethylene MR 475 2005
DICHLOROMETHANE MR 475 2005
p-Dichlorobenzene MR 475 2005
1,1-Dichloroethylene MR 475 2005
trans-1,2-Dichloroethylene MR 475 2005
1,2-Dichloroethane MR 475 2005
1,1,1-Trichloroethane MR 475 2005
Carbon tetrachloride MR 475 2005
1,2-Dichloropropane MR 475 2005
CHLOROBENZENE MR 475 2005
Benzene MR 475 2005
Toluene MR 475 2005
Ethylbenzene MR 475 2005
Styrene MR 475 2005
Vinyl chloride MR 475 2005
1,1,2-Trichloroethane MR 475 2005
Tetrachloroethylene MR 475 2005
Trichloroethylene MR 475 2005
o-Dichlorobenzene MR 475 2005
Coliform (TCR) MCL 15 1998
Coliform (TCR) MR 8 1995
Consumer Confidence Rule Other 1 1999
Nitrate MR 1 2014
Gross Alpha, Excl. Radon and U MR 1 1979

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 174 samples detected PFAS.

Contaminant Date Result MRL Status
PFMPA 9/23/2025 <4.00 ppt 4.00 ppt Not Detected
PFBA 9/23/2025 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 9/23/2025 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 9/23/2025 <5.00 ppt 5.00 ppt Not Detected
PFPeA 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
PFMBA 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 9/23/2025 <5.00 ppt 5.00 ppt Not Detected
NFDHA 9/23/2025 <20.00 ppt 20.00 ppt Not Detected
PFUnA 9/23/2025 <2.00 ppt 2.00 ppt Not Detected
PFPeS 9/23/2025 <4.00 ppt 4.00 ppt Not Detected
PFHpS 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
PFEESA 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
PFHxS 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 9/23/2025 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 9/23/2025 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 9/23/2025 <7.00 ppt 7.00 ppt Not Detected
PFTA 9/23/2025 <8.00 ppt 8.00 ppt Not Detected
PFOA 9/23/2025 <4.00 ppt 4.00 ppt Not Detected
9Cl-PF3ONS 9/23/2025 <2.00 ppt 2.00 ppt Not Detected
PFNA 9/23/2025 <4.00 ppt 4.00 ppt Not Detected
PFBS 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
PFDA 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
PFDoA 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
PFHxA 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 9/23/2025 <5.00 ppt 5.00 ppt Not Detected
ADONA 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
PFHpA 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
PFOS 9/23/2025 <4.00 ppt 4.00 ppt Not Detected
11Cl-PF3OUdS 9/23/2025 <5.00 ppt 5.00 ppt Not Detected
PFBA 9/23/2025 <5.00 ppt 5.00 ppt Not Detected
PFTA 9/23/2025 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 9/23/2025 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 9/23/2025 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 9/23/2025 <6.00 ppt 6.00 ppt Not Detected
PFOS 9/23/2025 <4.00 ppt 4.00 ppt Not Detected
PFOA 9/23/2025 <4.00 ppt 4.00 ppt Not Detected
PFDA 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
PFDoA 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
PFHxA 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
PFUnA 9/23/2025 <2.00 ppt 2.00 ppt Not Detected
ADONA 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 9/23/2025 <5.00 ppt 5.00 ppt Not Detected
PFNA 9/23/2025 <4.00 ppt 4.00 ppt Not Detected
PFPeS 9/23/2025 <4.00 ppt 4.00 ppt Not Detected
NFDHA 9/23/2025 <20.00 ppt 20.00 ppt Not Detected
PFEESA 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
PFMBA 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
PFPeA 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 9/23/2025 <2.00 ppt 2.00 ppt Not Detected

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 Forest Park Water District.

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 WA5340950 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 Forest Park Water District 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
2014 Nitrate MR 1 SDWIS / WA5340950 / 1040
2005 1,2,4-Trichlorobenzene MR 475 SDWIS / WA5340950 / 2378
2005 cis-1,2-Dichloroethylene MR 475 SDWIS / WA5340950 / 2380
2005 DICHLOROMETHANE MR 475 SDWIS / WA5340950 / 2964
2005 p-Dichlorobenzene MR 475 SDWIS / WA5340950 / 2969
2005 1,1-Dichloroethylene MR 475 SDWIS / WA5340950 / 2977
2005 trans-1,2-Dichloroethylene MR 475 SDWIS / WA5340950 / 2979
2005 1,2-Dichloroethane MR 475 SDWIS / WA5340950 / 2980
2005 1,1,1-Trichloroethane MR 475 SDWIS / WA5340950 / 2981
2005 Carbon tetrachloride MR 475 SDWIS / WA5340950 / 2982
2005 1,2-Dichloropropane MR 475 SDWIS / WA5340950 / 2983
2005 CHLOROBENZENE MR 475 SDWIS / WA5340950 / 2989
2005 Benzene MR 475 SDWIS / WA5340950 / 2990
2005 Toluene MR 475 SDWIS / WA5340950 / 2991
2005 Ethylbenzene MR 475 SDWIS / WA5340950 / 2992

How Lake Forest Park Water District Compares

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

Metric Lake Forest Park Water District Washington avg Federal benchmark
Total violations 9,527 69 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 15 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 3,171 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 Forest Park Water District water safe to drink?
Lake Forest Park Water District (PWS ID: WA5340950) has 9527 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 3,171 people using Groundwater sources.
How many people does Lake Forest Park Water District serve?
Lake Forest Park Water District serves 3,171 people in Lake Forest Park, Washington. It is a Local-owned system using Groundwater water sources with 908 service connections.
What type of violations does Lake Forest Park Water District have?
Lake Forest Park Water District has 9,527 total violations: 15 health-based violations (MCL exceedances or treatment failures), 9,510 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Lake Forest Park Water District water?
No. Lake Forest Park Water District was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Lake Forest Park Water District use?
Lake Forest Park Water District 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. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.
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.