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Community Water System · PWS OR4100893

Tillamook Water Dept, City Of

Tillamook, Oregon 97141 - drinking water served from surface water sources to 5,265 people, tracked in EPA SDWIS and UCMR5.

5,265
People served
98
EPA violations
3
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 98 drinking-water violations at Tillamook Water Dept, City Of, 3% of them health-based - above the Oregon per-system average.

98
Total EPA violations on record
3%
Health-based (MCL / treatment failure)
5,265
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Tillamook Water Dept, City Of

Tillamook Water Dept, City Of is a local-owned community water system that delivers drinking water to 5,265 residents in Tillamook, Oregon (Tillamook County) through 1,773 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 98 total violations for this system , of which 3 (3%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 90 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 9 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 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%).

Tillamook Water Dept, City Of's 98 violations sit above 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
5,265
Total Violations
98
Health-Based Violations
3
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
1,773
County
Tillamook
School/Daycare
No
MCL Violations
0
Monitoring Violations
90
Treatment Tech Violations
3

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 9 2023
Surface Water Treatment Rule MR 6 2019
Coliform (TCR) MR 5 2006
Surface Water Treatment Rule TT 3 1992
Interim Enhanced Surface Water Treatment Rule MR 3 2009
1,2,4-Trichlorobenzene MR 3 2009
cis-1,2-Dichloroethylene MR 3 2009
Xylenes, Total MR 3 2009
p-Dichlorobenzene MR 3 2009
Vinyl chloride MR 3 2009
1,1-Dichloroethylene MR 3 2009
trans-1,2-Dichloroethylene MR 3 2009
1,1,1-Trichloroethane MR 3 2009
Carbon tetrachloride MR 3 2009
1,1,2-Trichloroethane MR 3 2009
CHLOROBENZENE MR 3 2009
Benzene MR 3 2009
Toluene MR 3 2009
Styrene MR 3 2009
o-Dichlorobenzene MR 3 2009
Ethylbenzene MR 3 2009
DICHLOROMETHANE MR 3 2009
1,2-Dichloropropane MR 3 2009
Trichloroethylene MR 3 2009
Tetrachloroethylene MR 3 2009
1,2-Dichloroethane MR 3 2009
Consumer Confidence Rule Other 2 2025
Arsenic MR 1 2007
E. COLI MR 1 2023
Combined Radium (-226 and -228) MR 1 1976

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 203 samples detected PFAS.

Contaminant Date Result MRL Status
9Cl-PF3ONS 9/23/2025 <2.00 ppt 2.00 ppt Not Detected
PFHpS 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
PFBS 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
PFHpA 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
PFHxS 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
PFNA 9/23/2025 <4.00 ppt 4.00 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
11Cl-PF3OUdS 9/23/2025 <5.00 ppt 5.00 ppt Not Detected
PFMBA 9/23/2025 <3.00 ppt 3.00 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
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
PFMPA 9/23/2025 <4.00 ppt 4.00 ppt Not Detected
PFPeA 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
PFEESA 9/23/2025 <3.00 ppt 3.00 ppt Not Detected
PFPeS 9/23/2025 <4.00 ppt 4.00 ppt Not Detected
PFUnA 9/23/2025 <2.00 ppt 2.00 ppt Not Detected
PFTA 9/23/2025 <8.00 ppt 8.00 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
NFDHA 9/23/2025 <20.00 ppt 20.00 ppt Not Detected
PFTrDA 9/23/2025 <7.00 ppt 7.00 ppt Not Detected
PFDA 9/22/2025 <3.00 ppt 3.00 ppt Not Detected
PFOA 9/22/2025 <4.00 ppt 4.00 ppt Not Detected
PFOS 9/22/2025 <4.00 ppt 4.00 ppt Not Detected
PFUnA 9/22/2025 <2.00 ppt 2.00 ppt Not Detected
ADONA 9/22/2025 <3.00 ppt 3.00 ppt Not Detected
PFDoA 9/22/2025 <3.00 ppt 3.00 ppt Not Detected
PFMPA 9/22/2025 <4.00 ppt 4.00 ppt Not Detected
HFPO-DA 9/22/2025 <5.00 ppt 5.00 ppt Not Detected
PFHxA 9/22/2025 <3.00 ppt 3.00 ppt Not Detected
PFBA 9/22/2025 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 9/22/2025 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 9/22/2025 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 9/22/2025 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 9/22/2025 <2.00 ppt 2.00 ppt Not Detected
PFPeS 9/22/2025 <4.00 ppt 4.00 ppt Not Detected
11Cl-PF3OUdS 9/22/2025 <5.00 ppt 5.00 ppt Not Detected
PFPeA 9/22/2025 <3.00 ppt 3.00 ppt Not Detected
PFHxS 9/22/2025 <3.00 ppt 3.00 ppt Not Detected
PFHpA 9/22/2025 <3.00 ppt 3.00 ppt Not Detected
PFHpS 9/22/2025 <3.00 ppt 3.00 ppt Not Detected
PFNA 9/22/2025 <4.00 ppt 4.00 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 Tillamook Water Dept, City Of.

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 OR4100893 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
2025 Consumer Confidence Rule Other 2 SDWIS / OR4100893 / 7000
2023 Lead and Copper Rule MR 9 SDWIS / OR4100893 / 5000
2023 E. COLI MR 1 SDWIS / OR4100893 / 3014
2019 Surface Water Treatment Rule MR 6 SDWIS / OR4100893 / 0200
2009 Interim Enhanced Surface Water Treatment Rule MR 3 SDWIS / OR4100893 / 0300
2009 1,2,4-Trichlorobenzene MR 3 SDWIS / OR4100893 / 2378
2009 cis-1,2-Dichloroethylene MR 3 SDWIS / OR4100893 / 2380
2009 Xylenes, Total MR 3 SDWIS / OR4100893 / 2955
2009 p-Dichlorobenzene MR 3 SDWIS / OR4100893 / 2969
2009 Vinyl chloride MR 3 SDWIS / OR4100893 / 2976
2009 1,1-Dichloroethylene MR 3 SDWIS / OR4100893 / 2977
2009 trans-1,2-Dichloroethylene MR 3 SDWIS / OR4100893 / 2979
2009 1,1,1-Trichloroethane MR 3 SDWIS / OR4100893 / 2981
2009 Carbon tetrachloride MR 3 SDWIS / OR4100893 / 2982
2009 1,1,2-Trichloroethane MR 3 SDWIS / OR4100893 / 2985

How Tillamook Water Dept, City Of Compares

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

Metric Tillamook Water Dept, City Of Oregon avg Federal benchmark
Total violations 98 82.1 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 3 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 5,265 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 Tillamook Water Dept, City Of water safe to drink?
Tillamook Water Dept, City Of (PWS ID: OR4100893) has 98 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 5,265 people using Surface Water sources.
How many people does Tillamook Water Dept, City Of serve?
Tillamook Water Dept, City Of serves 5,265 people in Tillamook, Oregon. It is a Local-owned system using Surface Water water sources with 1,773 service connections.
What type of violations does Tillamook Water Dept, City Of have?
Tillamook Water Dept, City Of has 98 total violations: 3 health-based violations (MCL exceedances or treatment failures), 90 monitoring/reporting violations, and 3 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Tillamook Water Dept, City Of water?
No. Tillamook Water Dept, City Of was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Tillamook Water Dept, City Of use?
Tillamook Water Dept, City Of 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. 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.