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TWIN PINES MOBILE HOME PARK

PWS ID: WA5331790 · Tonasket, Washington 98855

TWIN PINES MOBILE HOME PARK serves 25 people in Tonasket, Washington using Groundwater water sources. It has 174 recorded EPA violations, including 0 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: TWIN PINES MOBILE HOME PARK

TWIN PINES MOBILE HOME PARK is a private-owned community water system that delivers drinking water to 25 residents in Tonasket, Washington (Okanogan County) through 14 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 174 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 174 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 Revised Total Coliform Rule, recorded in 5 violations (MON). 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. TWIN PINES MOBILE HOME PARK's 174 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
25
Total Violations
174
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
14
County
Okanogan
School/Daycare
No
MCL Violations
0
Monitoring Violations
174
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Revised Total Coliform Rule MON 5 2025
Di(2-ethylhexyl) phthalate MR 4 2020
p-Dichlorobenzene MR 4 2020
DICHLOROMETHANE MR 4 2020
cis-1,2-Dichloroethylene MR 4 2020
o-Dichlorobenzene MR 4 2020
Ethylbenzene MR 4 2020
Dinoseb MR 4 2020
Endrin MR 4 2020
1,1,2-Trichloroethane MR 4 2020
Toxaphene MR 4 2020
Hexachlorocyclopentadiene MR 4 2020
Heptachlor epoxide MR 4 2020
trans-1,2-Dichloroethylene MR 4 2020
Chlordane MR 4 2020
Simazine MR 4 2020
Styrene MR 4 2020
1,1,1-Trichloroethane MR 4 2020
2,4,5-TP MR 4 2020
1,2-Dichloropropane MR 4 2020
Tetrachloroethylene MR 4 2020
1,1-Dichloroethylene MR 4 2020
Benzo(a)pyrene MR 4 2020
Benzene MR 4 2020
LASSO MR 4 2020
Methoxychlor MR 4 2020
Toluene MR 4 2020
Picloram MR 4 2020
HEXACHLOROBENZENE MR 4 2020
1,2-Dichloroethane MR 4 2020

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 TWIN PINES MOBILE HOME 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 WA5331790 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 TWIN PINES MOBILE HOME 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 Revised Total Coliform Rule MON 5 SDWIS / WA5331790 / 8000
2025 Lead and Copper Rule MR 1 SDWIS / WA5331790 / 5000
2020 Di(2-ethylhexyl) phthalate MR 4 SDWIS / WA5331790 / 2039
2020 p-Dichlorobenzene MR 4 SDWIS / WA5331790 / 2969
2020 DICHLOROMETHANE MR 4 SDWIS / WA5331790 / 2964
2020 cis-1,2-Dichloroethylene MR 4 SDWIS / WA5331790 / 2380
2020 o-Dichlorobenzene MR 4 SDWIS / WA5331790 / 2968
2020 Ethylbenzene MR 4 SDWIS / WA5331790 / 2992
2020 Dinoseb MR 4 SDWIS / WA5331790 / 2041
2020 Endrin MR 4 SDWIS / WA5331790 / 2005
2020 1,1,2-Trichloroethane MR 4 SDWIS / WA5331790 / 2985
2020 Toxaphene MR 4 SDWIS / WA5331790 / 2020
2020 Hexachlorocyclopentadiene MR 4 SDWIS / WA5331790 / 2042
2020 Heptachlor epoxide MR 4 SDWIS / WA5331790 / 2067
2020 trans-1,2-Dichloroethylene MR 4 SDWIS / WA5331790 / 2979

How TWIN PINES MOBILE HOME PARK Compares

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

Metric TWIN PINES MOBILE HOME PARK Washington avg Federal benchmark
Total violations 174 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 25 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 TWIN PINES MOBILE HOME PARK water safe to drink? ▼
TWIN PINES MOBILE HOME PARK (PWS ID: WA5331790) has 174 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 25 people using Groundwater sources.
How many people does TWIN PINES MOBILE HOME PARK serve? ▼
TWIN PINES MOBILE HOME PARK serves 25 people in Tonasket, Washington. It is a Private-owned system using Groundwater water sources with 14 service connections.
What type of violations does TWIN PINES MOBILE HOME PARK have? ▼
TWIN PINES MOBILE HOME PARK has 174 total violations: 0 health-based violations (MCL exceedances or treatment failures), 174 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in TWIN PINES MOBILE HOME PARK water? ▼
No PFAS testing data is available for TWIN PINES MOBILE HOME PARK under the EPA's UCMR5 monitoring program.
What water source does TWIN PINES MOBILE HOME PARK use? ▼
TWIN PINES MOBILE HOME 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. This data is provided for informational purposes only.

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

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