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WOLF CREEK PROPERTY OWNERS ASSN

PWS ID: WA5311476 · Tonasket, Washington 98855-9433

WOLF CREEK PROPERTY OWNERS ASSN serves 71 people in Tonasket, Washington using Groundwater water sources. It has 613 recorded EPA violations, including 5 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: WOLF CREEK PROPERTY OWNERS ASSN

WOLF CREEK PROPERTY OWNERS ASSN is a private-owned community water system that delivers drinking water to 71 residents in Tonasket, Washington (Okanogan County) through 61 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 613 total violations for this system , of which 5 (1%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 607 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 o-Dichlorobenzene, recorded in 27 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. WOLF CREEK PROPERTY OWNERS ASSN's 613 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
71
Total Violations
613
Health-Based Violations
5
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
61
County
Okanogan
School/Daycare
No
MCL Violations
5
Monitoring Violations
607
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
o-Dichlorobenzene MR 27 2008
Vinyl chloride MR 27 2008
1,1-Dichloroethylene MR 27 2008
trans-1,2-Dichloroethylene MR 27 2008
1,1,1-Trichloroethane MR 27 2008
Carbon tetrachloride MR 27 2008
Tetrachloroethylene MR 27 2008
Toluene MR 27 2008
Ethylbenzene MR 27 2008
1,2-Dichloropropane MR 27 2008
1,1,2-Trichloroethane MR 27 2008
Benzene MR 27 2008
cis-1,2-Dichloroethylene MR 27 2008
p-Dichlorobenzene MR 27 2008
1,2-Dichloroethane MR 27 2008
Trichloroethylene MR 27 2008
CHLOROBENZENE MR 27 2008
Styrene MR 27 2008
DICHLOROMETHANE MR 27 2008
1,2,4-Trichlorobenzene MR 27 2008
Lead and Copper Rule MR 16 2008
Nitrate MR 7 2007
Coliform (TCR) MR 6 2006
Coliform (TCR) MCL 5 2007
Arsenic MR 3 2005
Barium MR 3 2005
CYANIDE MR 3 2005
Mercury MR 3 2005
Antimony, Total MR 3 2005
Cadmium MR 3 2005

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 WOLF CREEK PROPERTY OWNERS ASSN.

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 WA5311476 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 WOLF CREEK PROPERTY OWNERS ASSN 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 Revised Total Coliform Rule MON 2 SDWIS / WA5311476 / 8000
2015 Consumer Confidence Rule Other 1 SDWIS / WA5311476 / 7000
2008 o-Dichlorobenzene MR 27 SDWIS / WA5311476 / 2968
2008 Vinyl chloride MR 27 SDWIS / WA5311476 / 2976
2008 1,1-Dichloroethylene MR 27 SDWIS / WA5311476 / 2977
2008 trans-1,2-Dichloroethylene MR 27 SDWIS / WA5311476 / 2979
2008 1,1,1-Trichloroethane MR 27 SDWIS / WA5311476 / 2981
2008 Carbon tetrachloride MR 27 SDWIS / WA5311476 / 2982
2008 Tetrachloroethylene MR 27 SDWIS / WA5311476 / 2987
2008 Toluene MR 27 SDWIS / WA5311476 / 2991
2008 Ethylbenzene MR 27 SDWIS / WA5311476 / 2992
2008 1,2-Dichloropropane MR 27 SDWIS / WA5311476 / 2983
2008 1,1,2-Trichloroethane MR 27 SDWIS / WA5311476 / 2985
2008 Benzene MR 27 SDWIS / WA5311476 / 2990
2008 cis-1,2-Dichloroethylene MR 27 SDWIS / WA5311476 / 2380

How WOLF CREEK PROPERTY OWNERS ASSN Compares

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

Metric WOLF CREEK PROPERTY OWNERS ASSN Washington avg Federal benchmark
Total violations 613 69 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 5 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 71 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 WOLF CREEK PROPERTY OWNERS ASSN water safe to drink? ▼
WOLF CREEK PROPERTY OWNERS ASSN (PWS ID: WA5311476) has 613 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 71 people using Groundwater sources.
How many people does WOLF CREEK PROPERTY OWNERS ASSN serve? ▼
WOLF CREEK PROPERTY OWNERS ASSN serves 71 people in Tonasket, Washington. It is a Private-owned system using Groundwater water sources with 61 service connections.
What type of violations does WOLF CREEK PROPERTY OWNERS ASSN have? ▼
WOLF CREEK PROPERTY OWNERS ASSN has 613 total violations: 5 health-based violations (MCL exceedances or treatment failures), 607 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in WOLF CREEK PROPERTY OWNERS ASSN water? ▼
No PFAS testing data is available for WOLF CREEK PROPERTY OWNERS ASSN under the EPA's UCMR5 monitoring program.
What water source does WOLF CREEK PROPERTY OWNERS ASSN use? ▼
WOLF CREEK PROPERTY OWNERS ASSN 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. This data is provided for informational purposes only.

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

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