PlainWater

Community Water System · PWS OR4100205

Coos Bay North Bend Wtr Brd

Coos Bay, Oregon 97420 - drinking water served from surface water sources to 34,500 people, tracked in EPA SDWIS and UCMR5.

34,500
People served
20
EPA violations
4
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 20 drinking-water violations at Coos Bay North Bend Wtr Brd, 20% of them health-based - below the Oregon per-system average.

20
Total EPA violations on record
20%
Health-based (MCL / treatment failure)
34,500
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Coos Bay North Bend Wtr Brd

Coos Bay North Bend Wtr Brd is a local-owned community water system that delivers drinking water to 34,500 residents in Coos Bay, Oregon (Coos County) through 13,718 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 20 total violations for this system , of which 4 (20%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 12 monitoring and reporting violations are on file. The most recent violation on record dates to 2015.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 8 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%).

Coos Bay North Bend Wtr Brd's 20 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
34,500
Total Violations
20
Health-Based Violations
4
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
13,718
County
Coos
School/Daycare
No
MCL Violations
2
Monitoring Violations
12
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 8 2010
Surface Water Treatment Rule TT 2 2002
TTHM MCL 2 1991
Total Haloacetic Acids (HAA5) MR 1 2015
Gross Alpha, Excl. Radon and U MR 1 1976
Combined Radium (-226 and -228) MR 1 1976
TTHM MR 1 2015

PFAS Testing Results (UCMR5)

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

Contaminant Date Result MRL Status
NFDHA 7/29/2024 <20.00 ppt 20.00 ppt Not Detected
HFPO-DA 7/29/2024 <5.00 ppt 5.00 ppt Not Detected
PFBA 7/29/2024 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 7/29/2024 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 7/29/2024 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 7/29/2024 <5.00 ppt 5.00 ppt Not Detected
PFMPA 7/29/2024 <4.00 ppt 4.00 ppt Not Detected
PFPeA 7/29/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpS 7/29/2024 <3.00 ppt 3.00 ppt Not Detected
PFEESA 7/29/2024 <3.00 ppt 3.00 ppt Not Detected
PFPeS 7/29/2024 <4.00 ppt 4.00 ppt Not Detected
ADONA 7/29/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxS 7/29/2024 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 7/29/2024 <6.00 ppt 6.00 ppt Not Detected
PFMBA 7/29/2024 <3.00 ppt 3.00 ppt Not Detected
PFNA 7/29/2024 <4.00 ppt 4.00 ppt Not Detected
NEtFOSAA 7/29/2024 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 7/29/2024 <7.00 ppt 7.00 ppt Not Detected
PFTA 7/29/2024 <8.00 ppt 8.00 ppt Not Detected
PFOS 7/29/2024 <4.00 ppt 4.00 ppt Not Detected
PFHpA 7/29/2024 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 7/29/2024 <2.00 ppt 2.00 ppt Not Detected
PFOA 7/29/2024 <4.00 ppt 4.00 ppt Not Detected
PFDA 7/29/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 7/29/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxA 7/29/2024 <3.00 ppt 3.00 ppt Not Detected
PFUnA 7/29/2024 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 7/29/2024 <5.00 ppt 5.00 ppt Not Detected
PFBS 7/29/2024 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 4/24/2024 <2.00 ppt 2.00 ppt Not Detected
ADONA 4/24/2024 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 4/24/2024 <5.00 ppt 5.00 ppt Not Detected
PFBA 4/24/2024 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 4/24/2024 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 4/24/2024 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 4/24/2024 <5.00 ppt 5.00 ppt Not Detected
NFDHA 4/24/2024 <20.00 ppt 20.00 ppt Not Detected
PFMBA 4/24/2024 <3.00 ppt 3.00 ppt Not Detected
PFEESA 4/24/2024 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 4/24/2024 <5.00 ppt 5.00 ppt Not Detected
PFHpS 4/24/2024 <3.00 ppt 3.00 ppt Not Detected
PFMPA 4/24/2024 <4.00 ppt 4.00 ppt Not Detected
PFTA 4/24/2024 <8.00 ppt 8.00 ppt Not Detected
PFOS 4/24/2024 <4.00 ppt 4.00 ppt Not Detected
PFHxA 4/24/2024 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 4/24/2024 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 4/24/2024 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 4/24/2024 <6.00 ppt 6.00 ppt Not Detected
PFNA 4/24/2024 <4.00 ppt 4.00 ppt Not Detected
PFOA 4/24/2024 <4.00 ppt 4.00 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 Coos Bay North Bend Wtr Brd.

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 OR4100205 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
2015 Total Haloacetic Acids (HAA5) MR 1 SDWIS / OR4100205 / 2456
2015 TTHM MR 1 SDWIS / OR4100205 / 2950
2010 Coliform (TCR) MR 8 SDWIS / OR4100205 / 3100
2002 Surface Water Treatment Rule TT 2 SDWIS / OR4100205 / 0200
1991 TTHM MCL 2 SDWIS / OR4100205 / 2950
1976 Gross Alpha, Excl. Radon and U MR 1 SDWIS / OR4100205 / 4000
1976 Combined Radium (-226 and -228) MR 1 SDWIS / OR4100205 / 4010

How Coos Bay North Bend Wtr Brd Compares

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

Metric Coos Bay North Bend Wtr Brd Oregon avg Federal benchmark
Total violations 20 82.1 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 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 34,500 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 Coos Bay North Bend Wtr Brd water safe to drink?
Coos Bay North Bend Wtr Brd (PWS ID: OR4100205) has 20 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 34,500 people using Surface Water sources.
How many people does Coos Bay North Bend Wtr Brd serve?
Coos Bay North Bend Wtr Brd serves 34,500 people in Coos Bay, Oregon. It is a Local-owned system using Surface Water water sources with 13,718 service connections.
What type of violations does Coos Bay North Bend Wtr Brd have?
Coos Bay North Bend Wtr Brd has 20 total violations: 4 health-based violations (MCL exceedances or treatment failures), 12 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Coos Bay North Bend Wtr Brd water?
No. Coos Bay North Bend Wtr Brd was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Coos Bay North Bend Wtr Brd use?
Coos Bay North Bend Wtr Brd 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.
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.