PlainWater
States → Oregon

Community Water System · PWS OR4100454

Island City

Island City, Oregon 97850 - drinking water served from groundwater sources to 1,166 people, tracked in EPA SDWIS and UCMR5.

1,166
People served
62
EPA violations
5
Health-based
Untested
UCMR5 result

The verdict

EPA records 62 drinking-water violations at Island City, 8% of them health-based - below the Oregon per-system average.

62
Total EPA violations on record
8%
Health-based (MCL / treatment failure)
1,166
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Island City

Island City is a local-owned community water system that delivers drinking water to 1,166 residents in Island City, Oregon (Union County) through 558 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 62 total violations for this system , of which 5 (8%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 51 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 24 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%).

Island City's 62 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
1,166
Total Violations
62
Health-Based Violations
5
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
558
County
Union
School/Daycare
No
MCL Violations
5
Monitoring Violations
51
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 24 2011
Lead and Copper Rule MR 6 2022
Coliform (TCR) MCL 5 2008
Nitrate MR 5 2024
Consumer Confidence Rule Other 5 2025
E. COLI MR 4 2019
Revised Total Coliform Rule MON 3 2020
2,4-D MR 1 2018
Dinoseb MR 1 2018
Endothall MR 1 2018
Dalapon MR 1 2018
Combined Radium (-226 and -228) MR 1 1976
Gross Alpha, Excl. Radon and U MR 1 1976
Picloram MR 1 2018
Pentachlorophenol MR 1 2018
2,4,5-TP MR 1 2018

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 Island City.

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 OR4100454 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 5 SDWIS / OR4100454 / 7000
2024 Nitrate MR 5 SDWIS / OR4100454 / 1040
2022 Lead and Copper Rule MR 6 SDWIS / OR4100454 / 5000
2020 Revised Total Coliform Rule MON 3 SDWIS / OR4100454 / 8000
2019 E. COLI MR 4 SDWIS / OR4100454 / 3014
2018 2,4-D MR 1 SDWIS / OR4100454 / 2105
2018 Dinoseb MR 1 SDWIS / OR4100454 / 2041
2018 Endothall MR 1 SDWIS / OR4100454 / 2033
2018 Dalapon MR 1 SDWIS / OR4100454 / 2031
2018 Picloram MR 1 SDWIS / OR4100454 / 2040
2018 Pentachlorophenol MR 1 SDWIS / OR4100454 / 2326
2018 2,4,5-TP MR 1 SDWIS / OR4100454 / 2110
2011 Coliform (TCR) MR 24 SDWIS / OR4100454 / 3100
2008 Coliform (TCR) MCL 5 SDWIS / OR4100454 / 3100
1976 Combined Radium (-226 and -228) MR 1 SDWIS / OR4100454 / 4010

How Island City Compares

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

Metric Island City Oregon avg Federal benchmark
Total violations 62 82.1 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 5 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 1,166 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 Island City water safe to drink? ▼
Island City (PWS ID: OR4100454) has 62 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,166 people using Groundwater sources.
How many people does Island City serve? ▼
Island City serves 1,166 people in Island City, Oregon. It is a Local-owned system using Groundwater water sources with 558 service connections.
What type of violations does Island City have? ▼
Island City has 62 total violations: 5 health-based violations (MCL exceedances or treatment failures), 51 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Island City water? ▼
No PFAS testing data is available for Island City under the EPA's UCMR5 monitoring program.
What water source does Island City use? ▼
Island City uses Groundwater 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.