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CEDAR GROVE MOBILE PARK

PWS ID: WA5336836 · SEQUIM, Washington 98382

CEDAR GROVE MOBILE PARK serves 40 people in SEQUIM, Washington using Groundwater water sources. It has 79 recorded EPA violations, including 0 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: CEDAR GROVE MOBILE PARK

CEDAR GROVE MOBILE PARK is a private-owned community water system that delivers drinking water to 40 residents in SEQUIM, Washington (Clallam County) through 28 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 79 total violations for this system , of which 0 (0%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 71 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 14 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. CEDAR GROVE MOBILE PARK's 79 violations sit above the Washington average. Statewide, 98 of 247 UCMR5-tested systems have reported PFAS detections (39.7%). 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
40
Total Violations
79
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
28
County
Clallam
School/Daycare
No
MCL Violations
0
Monitoring Violations
71
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 14 2005
Coliform (TCR) MR 4 1997
Cadmium MR 3 2002
CYANIDE MR 3 2002
Fluoride MR 3 2002
Nickel MR 3 2002
Antimony, Total MR 3 2002
Thallium, Total MR 3 2002
Chromium MR 3 2002
Beryllium, Total MR 3 2002
Mercury MR 3 2002
Selenium MR 3 2002
Barium MR 3 2002
Consumer Confidence Rule Other 2 2025
cis-1,2-Dichloroethylene MR 1 2002
DICHLOROMETHANE MR 1 2002
p-Dichlorobenzene MR 1 2002
Vinyl chloride MR 1 2002
trans-1,2-Dichloroethylene MR 1 2002
1,2-Dichloroethane MR 1 2002
Carbon tetrachloride MR 1 2002
1,2-Dichloropropane MR 1 2002
Tetrachloroethylene MR 1 2002
CHLOROBENZENE MR 1 2002
Ethylbenzene MR 1 2002
1,1,2-Trichloroethane MR 1 2002
Trichloroethylene MR 1 2002
o-Dichlorobenzene MR 1 2002
Toluene MR 1 2002
1,1,1-Trichloroethane MR 1 2002

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 60 samples detected PFAS.

Contaminant Date Result MRL Status
PFMPA 12/17/2024 <0.004 µg/L 0.004 µg/L Not Detected
9Cl-PF3ONS 12/17/2024 <0.002 µg/L 0.002 µg/L Not Detected
NFDHA 12/17/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 12/17/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 12/17/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 12/17/2024 <9 µg/L 9 µg/L Not Detected
PFPeA 12/17/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 12/17/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 12/17/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 12/17/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 12/17/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 12/17/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 12/17/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 12/17/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 12/17/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 12/17/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 12/17/2024 <0.007 µg/L 0.007 µg/L Not Detected
11Cl-PF3OUdS 12/17/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 12/17/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFTA 12/17/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFHpA 12/17/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 12/17/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 12/17/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 12/17/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 12/17/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 12/17/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 12/17/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 12/17/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 12/17/2024 <0.002 µg/L 0.002 µg/L Not Detected
NEtFOSAA 12/17/2024 <0.005 µg/L 0.005 µg/L Not Detected
8:2 FTS 1/24/2024 <0.005 µg/L 0.005 µg/L Not Detected
NFDHA 1/24/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFMPA 1/24/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 1/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 1/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 1/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 1/24/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 1/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 1/24/2024 <9 µg/L 9 µg/L Not Detected
PFTA 1/24/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 1/24/2024 <0.007 µg/L 0.007 µg/L Not Detected
NMeFOSAA 1/24/2024 <0.006 µg/L 0.006 µg/L Not Detected
4:2 FTS 1/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 1/24/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFOA 1/24/2024 <0.004 µg/L 0.004 µg/L Not Detected
6:2 FTS 1/24/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHpA 1/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 1/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 1/24/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 1/24/2024 <0.004 µg/L 0.004 µg/L 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 CEDAR GROVE MOBILE PARK.

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 WA5336836 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 CEDAR GROVE MOBILE PARK 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
2025 Consumer Confidence Rule Other 2 SDWIS / WA5336836 / 7000
2005 Lead and Copper Rule MR 14 SDWIS / WA5336836 / 5000
2002 Cadmium MR 3 SDWIS / WA5336836 / 1015
2002 CYANIDE MR 3 SDWIS / WA5336836 / 1024
2002 Fluoride MR 3 SDWIS / WA5336836 / 1025
2002 Nickel MR 3 SDWIS / WA5336836 / 1036
2002 Antimony, Total MR 3 SDWIS / WA5336836 / 1074
2002 Thallium, Total MR 3 SDWIS / WA5336836 / 1085
2002 Chromium MR 3 SDWIS / WA5336836 / 1020
2002 Beryllium, Total MR 3 SDWIS / WA5336836 / 1075
2002 Mercury MR 3 SDWIS / WA5336836 / 1035
2002 Selenium MR 3 SDWIS / WA5336836 / 1045
2002 Barium MR 3 SDWIS / WA5336836 / 1010
2002 cis-1,2-Dichloroethylene MR 1 SDWIS / WA5336836 / 2380
2002 DICHLOROMETHANE MR 1 SDWIS / WA5336836 / 2964

How CEDAR GROVE MOBILE PARK Compares

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

Metric CEDAR GROVE MOBILE PARK Washington avg Federal benchmark
Total violations 79 69 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 0 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 40 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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is CEDAR GROVE MOBILE PARK water safe to drink? ▼
CEDAR GROVE MOBILE PARK (PWS ID: WA5336836) has 79 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 40 people using Groundwater sources.
How many people does CEDAR GROVE MOBILE PARK serve? ▼
CEDAR GROVE MOBILE PARK serves 40 people in SEQUIM, Washington. It is a Private-owned system using Groundwater water sources with 28 service connections.
What type of violations does CEDAR GROVE MOBILE PARK have? ▼
CEDAR GROVE MOBILE PARK has 79 total violations: 0 health-based violations (MCL exceedances or treatment failures), 71 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in CEDAR GROVE MOBILE PARK water? ▼
No. CEDAR GROVE MOBILE PARK was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does CEDAR GROVE MOBILE PARK use? ▼
CEDAR GROVE MOBILE PARK 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.

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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.

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

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial