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Community Water System · PWS OR4100194

Clatskanie, City Of

Clatskanie, Oregon 97016 - drinking water served from surface water sources to 2,188 people, tracked in EPA SDWIS and UCMR5.

2,188
People served
21
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 21 drinking-water violations at Clatskanie, City Of - below the Oregon per-system average.

21
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
2,188
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Clatskanie, City Of

Clatskanie, City Of is a local-owned community water system that delivers drinking water to 2,188 residents in Clatskanie, Oregon (Columbia County) through 922 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 21 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 16 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 Coliform (TCR), recorded in 4 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%).

Clatskanie, City Of's 21 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
2,188
Total Violations
21
Health-Based Violations
0
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
922
County
Columbia
School/Daycare
No
MCL Violations
0
Monitoring Violations
16
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 4 2011
Consumer Confidence Rule Other 3 2025
Total Haloacetic Acids (HAA5) MR 1 2024
Cadmium MR 1 1979
Combined Radium (-226 and -228) MR 1 1976
Selenium MR 1 1979
Arsenic MR 1 1979
Nitrate MR 1 1979
Gross Alpha, Excl. Radon and U MR 1 1976
TTHM MR 1 2024
Mercury MR 1 1979
Chromium MR 1 1979
Barium MR 1 1979
Fluoride MR 1 1979

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 Clatskanie, 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 OR4100194 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 3 SDWIS / OR4100194 / 7000
2024 Total Haloacetic Acids (HAA5) MR 1 SDWIS / OR4100194 / 2456
2024 TTHM MR 1 SDWIS / OR4100194 / 2950
2011 Coliform (TCR) MR 4 SDWIS / OR4100194 / 3100
1979 Cadmium MR 1 SDWIS / OR4100194 / 1015
1979 Selenium MR 1 SDWIS / OR4100194 / 1045
1979 Arsenic MR 1 SDWIS / OR4100194 / 1005
1979 Nitrate MR 1 SDWIS / OR4100194 / 1040
1979 Mercury MR 1 SDWIS / OR4100194 / 1035
1979 Chromium MR 1 SDWIS / OR4100194 / 1020
1979 Barium MR 1 SDWIS / OR4100194 / 1010
1979 Fluoride MR 1 SDWIS / OR4100194 / 1025
1976 Combined Radium (-226 and -228) MR 1 SDWIS / OR4100194 / 4010
1976 Gross Alpha, Excl. Radon and U MR 1 SDWIS / OR4100194 / 4000

How Clatskanie, City Of Compares

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

Metric Clatskanie, City Of Oregon avg Federal benchmark
Total violations 21 82.1 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 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 2,188 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 Clatskanie, City Of water safe to drink? ▼
Clatskanie, City Of (PWS ID: OR4100194) has 21 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 2,188 people using Surface Water sources.
How many people does Clatskanie, City Of serve? ▼
Clatskanie, City Of serves 2,188 people in Clatskanie, Oregon. It is a Local-owned system using Surface Water water sources with 922 service connections.
What type of violations does Clatskanie, City Of have? ▼
Clatskanie, City Of has 21 total violations: 0 health-based violations (MCL exceedances or treatment failures), 16 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Clatskanie, City Of water? ▼
No PFAS testing data is available for Clatskanie, City Of under the EPA's UCMR5 monitoring program.
What water source does Clatskanie, City Of use? ▼
Clatskanie, 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. 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.