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Community Water System · PWS OR4100624

Philomath Public Works

Philomath, Oregon 97370 - drinking water served from surface water sources to 4,670 people, tracked in EPA SDWIS and UCMR5.

4,670
People served
118
EPA violations
41
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 118 drinking-water violations at Philomath Public Works, 35% of them health-based - above the Oregon per-system average.

118
Total EPA violations on record
35%
Health-based (MCL / treatment failure)
4,670
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Philomath Public Works

Philomath Public Works is a local-owned community water system that delivers drinking water to 4,670 residents in Philomath, Oregon (Benton County) through 1,858 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 118 total violations for this system , of which 41 (35%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 75 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Surface Water Treatment Rule, recorded in 35 violations (TT, health-based). 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%).

Philomath Public Works's 118 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
4,670
Total Violations
118
Health-Based Violations
41
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
1,858
County
Benton
School/Daycare
No
MCL Violations
3
Monitoring Violations
75
Treatment Tech Violations
38

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule TT 35 1995
Nitrate MR 5 2007
DICHLOROMETHANE MR 3 2011
o-Dichlorobenzene MR 3 2011
Vinyl chloride MR 3 2011
1,1-Dichloroethylene MR 3 2011
trans-1,2-Dichloroethylene MR 3 2011
1,2-Dichloroethane MR 3 2011
Carbon tetrachloride MR 3 2011
1,2-Dichloropropane MR 3 2011
Trichloroethylene MR 3 2011
1,1,2-Trichloroethane MR 3 2011
Tetrachloroethylene MR 3 2011
Benzene MR 3 2011
Toluene MR 3 2011
Ethylbenzene MR 3 2011
1,2,4-Trichlorobenzene MR 3 2011
p-Dichlorobenzene MR 3 2011
CHLOROBENZENE MR 3 2011
Styrene MR 3 2011
Coliform (TCR) MCL 3 2013
Xylenes, Total MR 3 2011
Interim Enhanced Surface Water Treatment Rule TT 3 2013
1,1,1-Trichloroethane MR 3 2011
cis-1,2-Dichloroethylene MR 3 2011
Interim Enhanced Surface Water Treatment Rule MR 2 2009
Surface Water Treatment Rule MR 2 2009
Arsenic MR 1 2007
Revised Total Coliform Rule MON 1 2024
Coliform (TCR) MR 1 1995

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 232 samples detected PFAS.

Contaminant Date Result MRL Status
HFPO-DA 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 8/22/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
PFUnA 8/22/2023 <2.00 ppt 2.00 ppt Not Detected
PFHxA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFOS 8/22/2023 <4.00 ppt 4.00 ppt Not Detected
PFBA 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
PFNA 8/22/2023 <4.00 ppt 4.00 ppt Not Detected
PFHpA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 8/22/2023 <6.00 ppt 6.00 ppt Not Detected
PFOA 8/22/2023 <4.00 ppt 4.00 ppt Not Detected
6:2 FTS 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 8/22/2023 <4.00 ppt 4.00 ppt Not Detected
PFPeA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 8/22/2023 <20.00 ppt 20.00 ppt Not Detected
PFPeS 8/22/2023 <4.00 ppt 4.00 ppt Not Detected
PFHpS 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFTA 8/22/2023 <8.00 ppt 8.00 ppt Not Detected
NEtFOSAA 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
PFBS 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 8/22/2023 <7.00 ppt 7.00 ppt Not Detected
PFOS 8/22/2023 <4.00 ppt 4.00 ppt Not Detected
PFDoA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 8/22/2023 <4.00 ppt 4.00 ppt Not Detected
PFNA 8/22/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxS 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 8/22/2023 <2.00 ppt 2.00 ppt Not Detected
PFTrDA 8/22/2023 <7.00 ppt 7.00 ppt Not Detected
4:2 FTS 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
NEtFOSAA 8/22/2023 <5.00 ppt 5.00 ppt Not Detected
PFTA 8/22/2023 <8.00 ppt 8.00 ppt Not Detected
PFMPA 8/22/2023 <4.00 ppt 4.00 ppt Not Detected
NMeFOSAA 8/22/2023 <6.00 ppt 6.00 ppt Not Detected
PFHpS 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 8/22/2023 <4.00 ppt 4.00 ppt Not Detected
NFDHA 8/22/2023 <20.00 ppt 20.00 ppt Not Detected
PFEESA 8/22/2023 <3.00 ppt 3.00 ppt Not Detected
PFBA 8/22/2023 <5.00 ppt 5.00 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 Philomath Public Works.

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 OR4100624 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
2024 Revised Total Coliform Rule MON 1 SDWIS / OR4100624 / 8000
2013 Coliform (TCR) MCL 3 SDWIS / OR4100624 / 3100
2013 Interim Enhanced Surface Water Treatment Rule TT 3 SDWIS / OR4100624 / 0300
2011 DICHLOROMETHANE MR 3 SDWIS / OR4100624 / 2964
2011 o-Dichlorobenzene MR 3 SDWIS / OR4100624 / 2968
2011 Vinyl chloride MR 3 SDWIS / OR4100624 / 2976
2011 1,1-Dichloroethylene MR 3 SDWIS / OR4100624 / 2977
2011 trans-1,2-Dichloroethylene MR 3 SDWIS / OR4100624 / 2979
2011 1,2-Dichloroethane MR 3 SDWIS / OR4100624 / 2980
2011 Carbon tetrachloride MR 3 SDWIS / OR4100624 / 2982
2011 1,2-Dichloropropane MR 3 SDWIS / OR4100624 / 2983
2011 Trichloroethylene MR 3 SDWIS / OR4100624 / 2984
2011 1,1,2-Trichloroethane MR 3 SDWIS / OR4100624 / 2985
2011 Tetrachloroethylene MR 3 SDWIS / OR4100624 / 2987
2011 Benzene MR 3 SDWIS / OR4100624 / 2990

How Philomath Public Works Compares

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

Metric Philomath Public Works Oregon avg Federal benchmark
Total violations 118 82.1 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 41 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 4,670 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 Philomath Public Works water safe to drink? ▼
Philomath Public Works (PWS ID: OR4100624) has 118 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 4,670 people using Surface Water sources.
How many people does Philomath Public Works serve? ▼
Philomath Public Works serves 4,670 people in Philomath, Oregon. It is a Local-owned system using Surface Water water sources with 1,858 service connections.
What type of violations does Philomath Public Works have? ▼
Philomath Public Works has 118 total violations: 41 health-based violations (MCL exceedances or treatment failures), 75 monitoring/reporting violations, and 38 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Philomath Public Works water? ▼
No. Philomath Public Works was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Philomath Public Works use? ▼
Philomath Public Works 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.

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.