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Community Water System · PWS OR4100895

West Hills Water Company

Tillamook, Oregon 97141 - drinking water served from surface water sources to 299 people, tracked in EPA SDWIS and UCMR5.

299
People served
24
EPA violations
1
Health-based
Untested
UCMR5 result

The verdict

EPA records 24 drinking-water violations at West Hills Water Company, 4% of them health-based - below the Oregon per-system average.

24
Total EPA violations on record
4%
Health-based (MCL / treatment failure)
299
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: West Hills Water Company

West Hills Water Company is a private-owned community water system that delivers drinking water to 299 residents in Tillamook, Oregon (Tillamook County) through 105 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 24 total violations for this system , of which 1 (4%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 17 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 5 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 Oregon, EPA tracks 2,518 public water systems serving 4,005,242 people, with 206,659 cumulative violations and 20,339 health-based violations on record. About 99% of systems in the state carry at least one violation, and state-wide the average per system is 82.1 violations. Statewide, 30 of 125 UCMR5-tested systems have reported PFAS detections (24%).

West Hills Water Company's 24 violations sit below the Oregon 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
299
Total Violations
24
Health-Based Violations
1
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
105
County
Tillamook
School/Daycare
No
MCL Violations
0
Monitoring Violations
17
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 5 2003
Coliform (TCR) MR 4 2010
Total Haloacetic Acids (HAA5) MR 4 2016
TTHM MR 4 2016
Consumer Confidence Rule Other 3 2023
Surface Water Treatment Rule TT 1 1992

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 West Hills Water Company.

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 OR4100895 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Oregon Drinking Water Authority

Oregon's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find OR regulator via EPA SDWIS

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
2023 Consumer Confidence Rule Other 3 SDWIS / OR4100895 / 7000
2016 Total Haloacetic Acids (HAA5) MR 4 SDWIS / OR4100895 / 2456
2016 TTHM MR 4 SDWIS / OR4100895 / 2950
2010 Coliform (TCR) MR 4 SDWIS / OR4100895 / 3100
2003 Lead and Copper Rule MR 5 SDWIS / OR4100895 / 5000
1992 Surface Water Treatment Rule TT 1 SDWIS / OR4100895 / 0200

How West Hills Water Company Compares

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

Metric West Hills Water Company Oregon avg Federal benchmark
Total violations 24 82.1 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 1 8.1 Indicates a contaminant exceeded a federal MCL
PFAS detection None 24% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 299 1,591 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,518 regulated public water systems in Oregon.

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 West Hills Water Company water safe to drink? ▼
West Hills Water Company (PWS ID: OR4100895) has 24 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 299 people using Surface Water sources.
How many people does West Hills Water Company serve? ▼
West Hills Water Company serves 299 people in Tillamook, Oregon. It is a Private-owned system using Surface Water water sources with 105 service connections.
What type of violations does West Hills Water Company have? ▼
West Hills Water Company has 24 total violations: 1 health-based violations (MCL exceedances or treatment failures), 17 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in West Hills Water Company water? ▼
No PFAS testing data is available for West Hills Water Company under the EPA's UCMR5 monitoring program.
What water source does West Hills Water Company use? ▼
West Hills Water Company uses Surface Water 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.