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Community Water System · PWS OR4100003

Adair Village Water System

Adair Village, Oregon 97330 - drinking water served from surface water sources to 875 people, tracked in EPA SDWIS and UCMR5.

875
People served
230
EPA violations
17
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 230 drinking-water violations at Adair Village Water System, 7% of them health-based - above the Oregon per-system average.

230
Total EPA violations on record
7%
Health-based (MCL / treatment failure)
875
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Adair Village Water System

Adair Village Water System is a local-owned community water system that delivers drinking water to 875 residents in Adair Village, Oregon (Benton County) through 453 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 230 total violations for this system , of which 17 (7%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 206 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 45 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%).

Adair Village Water System's 230 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
875
Total Violations
230
Health-Based Violations
17
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
453
County
Benton
School/Daycare
No
MCL Violations
0
Monitoring Violations
206
Treatment Tech Violations
17

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule MR 45 2020
Interim Enhanced Surface Water Treatment Rule MR 20 2020
Surface Water Treatment Rule TT 17 2001
TTHM MR 9 2023
Total Haloacetic Acids (HAA5) MR 8 2023
Consumer Confidence Rule Other 6 2023
Revised Total Coliform Rule MON 4 2024
Arsenic MR 3 2007
Lead and Copper Rule MR 3 1994
cis-1,2-Dichloroethylene MR 2 2007
o-Dichlorobenzene MR 2 2007
p-Dichlorobenzene MR 2 2007
Vinyl chloride MR 2 2007
1,1-Dichloroethylene MR 2 2007
trans-1,2-Dichloroethylene MR 2 2007
1,2-Dichloroethane MR 2 2007
1,1,1-Trichloroethane MR 2 2007
1,2-Dichloropropane MR 2 2007
Benzene MR 2 2007
Toluene MR 2 2007
Ethylbenzene MR 2 2007
1,2,4-Trichlorobenzene MR 2 2007
Carbon tetrachloride MR 2 2007
Trichloroethylene MR 2 2007
1,1,2-Trichloroethane MR 2 2007
Tetrachloroethylene MR 2 2007
Methoxychlor MR 2 2020
Toxaphene MR 2 2020
Dalapon MR 2 2020
Diquat MR 2 2020

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 116 samples detected PFAS.

Contaminant Date Result MRL Status
8:2 FTS 8/23/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 8/23/2023 <4.00 ppt 4.00 ppt Not Detected
PFPeA 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
PFTA 8/23/2023 <8.00 ppt 8.00 ppt Not Detected
PFBA 8/23/2023 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 8/23/2023 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 8/23/2023 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 8/23/2023 <6.00 ppt 6.00 ppt Not Detected
PFPeS 8/23/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxA 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 8/23/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 8/23/2023 <4.00 ppt 4.00 ppt Not Detected
PFOA 8/23/2023 <4.00 ppt 4.00 ppt Not Detected
4:2 FTS 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 8/23/2023 <5.00 ppt 5.00 ppt Not Detected
PFUnA 8/23/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 8/23/2023 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 8/23/2023 <2.00 ppt 2.00 ppt Not Detected
ADONA 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 8/23/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpS 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 8/23/2023 <20.00 ppt 20.00 ppt Not Detected
6:2 FTS 5/9/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 5/9/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 5/9/2023 <4.00 ppt 4.00 ppt Not Detected
PFOA 5/9/2023 <4.00 ppt 4.00 ppt Not Detected
PFDA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 5/9/2023 <2.00 ppt 2.00 ppt Not Detected
9Cl-PF3ONS 5/9/2023 <2.00 ppt 2.00 ppt Not Detected
ADONA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
PFBA 5/9/2023 <5.00 ppt 5.00 ppt Not Detected
PFHxA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
4:2 FTS 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 5/9/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 5/9/2023 <4.00 ppt 4.00 ppt Not Detected
PFPeA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 5/9/2023 <20.00 ppt 20.00 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 Adair Village Water System.

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 OR4100003 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 4 SDWIS / OR4100003 / 8000
2023 TTHM MR 9 SDWIS / OR4100003 / 2950
2023 Total Haloacetic Acids (HAA5) MR 8 SDWIS / OR4100003 / 2456
2023 Consumer Confidence Rule Other 6 SDWIS / OR4100003 / 7000
2020 Surface Water Treatment Rule MR 45 SDWIS / OR4100003 / 0200
2020 Interim Enhanced Surface Water Treatment Rule MR 20 SDWIS / OR4100003 / 0300
2020 Methoxychlor MR 2 SDWIS / OR4100003 / 2015
2020 Toxaphene MR 2 SDWIS / OR4100003 / 2020
2020 Dalapon MR 2 SDWIS / OR4100003 / 2031
2020 Diquat MR 2 SDWIS / OR4100003 / 2032
2020 Endothall MR 2 SDWIS / OR4100003 / 2033
2020 Glyphosate MR 2 SDWIS / OR4100003 / 2034
2020 Di(2-ethylhexyl) adipate MR 2 SDWIS / OR4100003 / 2035
2020 OXAMYL MR 2 SDWIS / OR4100003 / 2036
2020 Simazine MR 2 SDWIS / OR4100003 / 2037

How Adair Village Water System Compares

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

Metric Adair Village Water System Oregon avg Federal benchmark
Total violations 230 82.1 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 17 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 875 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 Adair Village Water System water safe to drink? ▼
Adair Village Water System (PWS ID: OR4100003) has 230 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 875 people using Surface Water sources.
How many people does Adair Village Water System serve? ▼
Adair Village Water System serves 875 people in Adair Village, Oregon. It is a Local-owned system using Surface Water water sources with 453 service connections.
What type of violations does Adair Village Water System have? ▼
Adair Village Water System has 230 total violations: 17 health-based violations (MCL exceedances or treatment failures), 206 monitoring/reporting violations, and 17 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Adair Village Water System water? ▼
No. Adair Village Water System was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Adair Village Water System use? ▼
Adair Village Water System 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.