QUIMPER

Q: Is QUIMPER water safe to drink?

QUIMPER (PWS ID: WA5305783) has 676 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 14,500 people using Groundwater sources.

Q: How many people does QUIMPER serve?

QUIMPER serves 14,500 people in Port Townsend, Washington. It is a Local-owned system using Groundwater water sources with 4,177 service connections.

Q: What type of violations does QUIMPER have?

QUIMPER has 676 total violations: 0 health-based violations (MCL exceedances or treatment failures), 667 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Q: Has PFAS been detected in QUIMPER water?

Yes. UCMR5 testing detected 1 PFAS compound in QUIMPER's water supply: PFBS. PFAS are persistent "forever chemicals" that do not break down in the environment.

Q: What water source does QUIMPER use?

QUIMPER uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Q: 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.

Reviewed byPlainWater Editorial, Drinking Water Quality Editorial Team · June 4, 2026

PWS ID: WA5305783 · Port Townsend, Washington 98368

QUIMPER serves 14,500 people in Port Townsend, Washington using Groundwater water sources. It has 676 recorded EPA violations, including 0 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (1 compound found).

Water Quality Snapshot: QUIMPER

QUIMPER is a local-owned community water system that delivers drinking water to 14,500 residents in Port Townsend, Washington (Jefferson County) through 4,177 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 676 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 667 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 1,2,4-Trichlorobenzene, recorded in 24 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 0.0031 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

Across Washington, EPA tracks 4,557 public water systems serving 9,736,844 people, with 314,648 cumulative violations and 20,590 health-based violations on record. About 92% of systems in the state carry at least one violation, and state-wide the average per system is 69 violations. QUIMPER's 676 violations sit above the Washington average. Statewide, 98 of 247 UCMR5-tested systems have reported PFAS detections (39.7%). 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

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

Population Served

14,500

Total Violations

676

Health-Based Violations

Water Source

Groundwater

System Details

System Type: Community
Owner Type: Local
Connections: 4,177
County: Jefferson
School/Daycare: No
MCL Violations: 0
Monitoring Violations: 667
Treatment Tech Violations: 0

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
1,2,4-Trichlorobenzene	MR	24	2005
cis-1,2-Dichloroethylene	MR	24	2005
DICHLOROMETHANE	MR	24	2005
Vinyl chloride	MR	24	2005
1,1-Dichloroethylene	MR	24	2005
trans-1,2-Dichloroethylene	MR	24	2005
1,1,1-Trichloroethane	MR	24	2005
Carbon tetrachloride	MR	24	2005
1,2-Dichloropropane	MR	24	2005
Trichloroethylene	MR	24	2005
o-Dichlorobenzene	MR	24	2005
p-Dichlorobenzene	MR	24	2005
1,2-Dichloroethane	MR	24	2005
1,1,2-Trichloroethane	MR	24	2005
CHLOROBENZENE	MR	24	2005
Ethylbenzene	MR	24	2005
Toluene	MR	24	2005
Styrene	MR	24	2005
Benzene	MR	24	2005
Tetrachloroethylene	MR	24	2005
Pentachlorophenol	MR	10	2005
Nitrate	MR	7	2012
Dalapon	MR	7	2005
2,4,5-TP	MR	7	2005
Carbofuran	MR	7	2005
Aldicarb	MR	7	2005
Endrin	MR	7	2005
Methoxychlor	MR	7	2005
Di(2-ethylhexyl) phthalate	MR	7	2005
Hexachlorocyclopentadiene	MR	7	2005

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 1 of 480 samples detected PFAS.

Contaminant	Date	Result	MRL	Status
PFHpS	9/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFDoA	9/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFDA	9/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFOA	9/5/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFOS	9/5/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFNA	9/5/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFHxS	9/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHxA	9/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFBS	9/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
HFPO-DA	9/5/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFPeS	9/5/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFHpA	9/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFUnA	9/5/2023	<0.002 µg/L	0.002 µg/L	Not Detected
11Cl-PF3OUdS	9/5/2023	<0.005 µg/L	0.005 µg/L	Not Detected
ADONA	9/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFMBA	9/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFBA	9/5/2023	<0.005 µg/L	0.005 µg/L	Not Detected
6:2 FTS	9/5/2023	<0.005 µg/L	0.005 µg/L	Not Detected
4:2 FTS	9/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
8:2 FTS	9/5/2023	<0.005 µg/L	0.005 µg/L	Not Detected
lithium	9/5/2023	<9 µg/L	9 µg/L	Not Detected
PFTA	9/5/2023	<0.008 µg/L	0.008 µg/L	Not Detected
PFTrDA	9/5/2023	<0.007 µg/L	0.007 µg/L	Not Detected
NEtFOSAA	9/5/2023	<0.005 µg/L	0.005 µg/L	Not Detected
NMeFOSAA	9/5/2023	<0.006 µg/L	0.006 µg/L	Not Detected
9Cl-PF3ONS	9/5/2023	<0.002 µg/L	0.002 µg/L	Not Detected
PFPeA	9/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFMPA	9/5/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFEESA	9/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
NFDHA	9/5/2023	<0.02 µg/L	0.02 µg/L	Not Detected
PFOS	9/5/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFHxA	9/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFDoA	9/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFDA	9/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFOA	9/5/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFNA	9/5/2023	<0.004 µg/L	0.004 µg/L	Not Detected
11Cl-PF3OUdS	9/5/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFUnA	9/5/2023	<0.002 µg/L	0.002 µg/L	Not Detected
PFHxS	9/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
NMeFOSAA	9/5/2023	<0.006 µg/L	0.006 µg/L	Not Detected
NEtFOSAA	9/5/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFTrDA	9/5/2023	<0.007 µg/L	0.007 µg/L	Not Detected
PFTA	9/5/2023	<0.008 µg/L	0.008 µg/L	Not Detected
lithium	9/5/2023	<9 µg/L	9 µg/L	Not Detected
PFHpA	9/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeS	9/5/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFBS	9/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHpS	9/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
9Cl-PF3ONS	9/5/2023	<0.002 µg/L	0.002 µg/L	Not Detected
NFDHA	9/5/2023	<0.02 µg/L	0.02 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 QUIMPER.

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 WA5305783 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Washington Drinking Water Authority

Washington State Department of Health — Office of Drinking Water is the primacy agency that licenses and inspects QUIMPER under EPA-delegated authority.

Open WA regulator portal

Source: Washington State Department of Health — Office of Drinking Water

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 / WA5305783 / 7000
2012	Nitrate	MR	7	SDWIS / WA5305783 / 1040
2008	Diquat	MR	1	SDWIS / WA5305783 / 2032
2007	Lead and Copper Rule	MR	1	SDWIS / WA5305783 / 5000
2005	1,2,4-Trichlorobenzene	MR	24	SDWIS / WA5305783 / 2378
2005	cis-1,2-Dichloroethylene	MR	24	SDWIS / WA5305783 / 2380
2005	DICHLOROMETHANE	MR	24	SDWIS / WA5305783 / 2964
2005	Vinyl chloride	MR	24	SDWIS / WA5305783 / 2976
2005	1,1-Dichloroethylene	MR	24	SDWIS / WA5305783 / 2977
2005	trans-1,2-Dichloroethylene	MR	24	SDWIS / WA5305783 / 2979
2005	1,1,1-Trichloroethane	MR	24	SDWIS / WA5305783 / 2981
2005	Carbon tetrachloride	MR	24	SDWIS / WA5305783 / 2982
2005	1,2-Dichloropropane	MR	24	SDWIS / WA5305783 / 2983
2005	Trichloroethylene	MR	24	SDWIS / WA5305783 / 2984
2005	o-Dichlorobenzene	MR	24	SDWIS / WA5305783 / 2968

How QUIMPER Compares

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

Metric	QUIMPER	Washington avg	Federal benchmark
Total violations	676	69	SDWA compliance — any non-zero count is a recorded breach
Health-based violations	0	4.5	Indicates a contaminant exceeded a federal MCL
PFAS detection	1 compound	39.7%	EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served	14,500	2,137	Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 4,557 regulated public water systems in Washington.

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 QUIMPER water safe to drink? ▼

QUIMPER (PWS ID: WA5305783) has 676 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 14,500 people using Groundwater sources.

How many people does QUIMPER serve? ▼

QUIMPER serves 14,500 people in Port Townsend, Washington. It is a Local-owned system using Groundwater water sources with 4,177 service connections.

What type of violations does QUIMPER have? ▼

QUIMPER has 676 total violations: 0 health-based violations (MCL exceedances or treatment failures), 667 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in QUIMPER water? ▼

Yes. UCMR5 testing detected 1 PFAS compound in QUIMPER's water supply: PFBS. PFAS are persistent "forever chemicals" that do not break down in the environment.

What water source does QUIMPER use? ▼

QUIMPER 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.

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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.

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