PlainWater
States → Oregon

SHERWOOD, CITY OF

PWS ID: OR4100816 · SHERWOOD, Oregon 97140

SHERWOOD, CITY OF serves 19,885 people in SHERWOOD, Oregon using Surface Water water sources. It has 40 recorded EPA violations, including 7 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (2 compounds found).

Water Quality Snapshot: SHERWOOD, CITY OF

SHERWOOD, CITY OF is a local-owned community water system that delivers drinking water to 19,885 residents in SHERWOOD, Oregon (Washington County) through 5,591 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 40 total violations for this system , of which 7 (18%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 31 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 10 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 2 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 0.0413 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

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. SHERWOOD, CITY OF's 40 violations sit below the Oregon average. Statewide, 30 of 125 UCMR5-tested systems have reported PFAS detections (24%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

PFAS Detected

2 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
19,885
Total Violations
40
Health-Based Violations
7
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
5,591
County
Washington
School/Daycare
No
MCL Violations
7
Monitoring Violations
31
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 10 2000
Coliform (TCR) MCL 7 1993
Diquat MR 4 2009
Lead and Copper Rule MR 4 1994
Nitrate MR 4 1999
Benzo(a)pyrene MR 2 2011
TTHM MR 2 2015
Total Haloacetic Acids (HAA5) MR 2 2015
Combined Radium (-226 and -228) MR 1 1976
Consumer Confidence Rule Other 1 2025
Revised Total Coliform Rule MON 1 2021
Gross Alpha, Excl. Radon and U MR 1 1976

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 2 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
ADONA 9/25/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 9/25/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFBA 9/25/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 9/25/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 9/25/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 9/25/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 9/25/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFPeA 9/25/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 9/25/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 9/25/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 9/25/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 9/25/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 9/25/2024 <0.002 µg/L 0.002 µg/L Not Detected
NMeFOSAA 9/25/2024 <0.006 µg/L 0.006 µg/L Not Detected
NFDHA 9/25/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFNA 9/25/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFTA 9/25/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 9/25/2024 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 9/25/2024 <0.005 µg/L 0.005 µg/L Not Detected
lithium 9/25/2024 <9 µg/L 9 µg/L Not Detected
PFBS 9/25/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 9/25/2024 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 9/25/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFOS 9/25/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 9/25/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 9/25/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 9/25/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 9/25/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 9/25/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHpA 9/25/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 6/2/2025 <9 µg/L 9 µg/L Not Detected
PFPeS 6/12/2025 <0.004 µg/L 0.004 µg/L Not Detected
ADONA 6/12/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 6/12/2025 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 6/12/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 6/12/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 6/12/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 6/12/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 6/12/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 6/12/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 6/12/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFHpS 6/12/2025 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 6/12/2025 <0.006 µg/L 0.006 µg/L Not Detected
9Cl-PF3ONS 6/12/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFEESA 6/12/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 6/12/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 6/12/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 6/12/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 6/12/2025 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 6/12/2025 <0.005 µg/L 0.005 µg/L 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 SHERWOOD, 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 OR4100816 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 1 SDWIS / OR4100816 / 7000
2021 Revised Total Coliform Rule MON 1 SDWIS / OR4100816 / 8000
2015 TTHM MR 2 SDWIS / OR4100816 / 2950
2015 Total Haloacetic Acids (HAA5) MR 2 SDWIS / OR4100816 / 2456
2011 Benzo(a)pyrene MR 2 SDWIS / OR4100816 / 2306
2009 Diquat MR 4 SDWIS / OR4100816 / 2032
2000 Coliform (TCR) MR 10 SDWIS / OR4100816 / 3100
1999 Nitrate MR 4 SDWIS / OR4100816 / 1040
1994 Lead and Copper Rule MR 4 SDWIS / OR4100816 / 5000
1993 Coliform (TCR) MCL 7 SDWIS / OR4100816 / 3100
1976 Combined Radium (-226 and -228) MR 1 SDWIS / OR4100816 / 4010
1976 Gross Alpha, Excl. Radon and U MR 1 SDWIS / OR4100816 / 4000

How SHERWOOD, CITY OF Compares

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

Metric SHERWOOD, CITY OF Oregon avg Federal benchmark
Total violations 40 82.1 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 7 8.1 Indicates a contaminant exceeded a federal MCL
PFAS detection 2 compounds 24% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 19,885 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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is SHERWOOD, CITY OF water safe to drink? ▼
SHERWOOD, CITY OF (PWS ID: OR4100816) has 40 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 2 PFAS compounds found. This system serves 19,885 people using Surface Water sources.
How many people does SHERWOOD, CITY OF serve? ▼
SHERWOOD, CITY OF serves 19,885 people in SHERWOOD, Oregon. It is a Local-owned system using Surface Water water sources with 5,591 service connections.
What type of violations does SHERWOOD, CITY OF have? ▼
SHERWOOD, CITY OF has 40 total violations: 7 health-based violations (MCL exceedances or treatment failures), 31 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in SHERWOOD, CITY OF water? ▼
Yes. UCMR5 testing detected 2 PFAS compounds in SHERWOOD, CITY OF's water supply: 6:2 FTS, 8:2 FTS. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does SHERWOOD, CITY OF use? ▼
SHERWOOD, 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.

Explore PlainWater

Water in Oregon

All systems in state
All States

Water quality by state
Contaminants

PFAS & other pollutants
Guides

Understanding water quality

Related Data for Oregon

Environmental Data → Natural Hazards → Air Quality → Healthcare Access → Climate Data →
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.

Related

Browse all → | Rankings →
Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial