QUINCY WATER DEPARTMENT CITY OF

Q: Is QUINCY WATER DEPARTMENT CITY OF water safe to drink?

QUINCY WATER DEPARTMENT CITY OF (PWS ID: WA5370450) has 281 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 8,415 people using Groundwater sources.

Q: What type of violations does QUINCY WATER DEPARTMENT CITY OF have?

QUINCY WATER DEPARTMENT CITY OF has 281 total violations: 33 health-based violations (MCL exceedances or treatment failures), 246 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Q: Has PFAS been detected in QUINCY WATER DEPARTMENT CITY OF water?

No. QUINCY WATER DEPARTMENT CITY OF was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.

Q: What water source does QUINCY WATER DEPARTMENT CITY OF use?

QUINCY WATER DEPARTMENT CITY OF 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: WA5370450 · Quincy, Washington 98848

QUINCY WATER DEPARTMENT CITY OF serves 8,415 people in Quincy, Washington using Groundwater water sources. It has 281 recorded EPA violations, including 33 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: QUINCY WATER DEPARTMENT CITY OF

QUINCY WATER DEPARTMENT CITY OF is a local-owned community water system that delivers drinking water to 8,415 residents in Quincy, Washington (Grant County) through 2,763 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 281 total violations for this system , of which 33 (12%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 246 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is Nitrate, recorded in 33 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 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. QUINCY WATER DEPARTMENT CITY OF's 281 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.

Population Served

8,415

Total Violations

281

Health-Based Violations

Water Source

Groundwater

System Details

System Type: Community
Owner Type: Local
Connections: 2,763
County: Grant
School/Daycare: No
MCL Violations: 33
Monitoring Violations: 246
Treatment Tech Violations: 0

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
Nitrate	MR	33	2018
Coliform (TCR)	MCL	33	2005
Dalapon	MR	13	2021
Picloram	MR	13	2021
Dinoseb	MR	13	2021
Pentachlorophenol	MR	13	2021
2,4,5-TP	MR	13	2021
Diquat	MR	12	2005
Coliform (TCR)	MR	8	2010
Aldicarb sulfoxide	MR	5	2008
Aldicarb sulfone	MR	5	2008
Aldicarb	MR	5	2008
Carbofuran	MR	5	2008
OXAMYL	MR	5	2008
BHC-GAMMA	MR	4	2014
Methoxychlor	MR	4	2014
Toxaphene	MR	4	2014
Di(2-ethylhexyl) phthalate	MR	4	2014
Heptachlor epoxide	MR	4	2014
Benzo(a)pyrene	MR	4	2014
Chlordane	MR	4	2014
Di(2-ethylhexyl) adipate	MR	4	2014
Simazine	MR	4	2014
Atrazine	MR	4	2014
LASSO	MR	4	2014
Endrin	MR	4	2014
Heptachlor	MR	4	2014
HEXACHLOROBENZENE	MR	4	2014
Hexachlorocyclopentadiene	MR	4	2014
cis-1,2-Dichloroethylene	MR	2	2022

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 300 samples detected PFAS.

Contaminant	Date	Result	MRL	Status
lithium	5/31/2023	<9 µg/L	9 µg/L	Not Detected
PFMPA	5/31/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFHpA	5/31/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFBS	5/31/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHpS	5/31/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeS	5/31/2023	<0.004 µg/L	0.004 µg/L	Not Detected
NFDHA	5/31/2023	<0.02 µg/L	0.02 µg/L	Not Detected
PFEESA	5/31/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeA	5/31/2023	<0.003 µg/L	0.003 µg/L	Not Detected
8:2 FTS	5/31/2023	<0.005 µg/L	0.005 µg/L	Not Detected
4:2 FTS	5/31/2023	<0.003 µg/L	0.003 µg/L	Not Detected
6:2 FTS	5/31/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFBA	5/31/2023	<0.005 µg/L	0.005 µg/L	Not Detected
HFPO-DA	5/31/2023	<0.005 µg/L	0.005 µg/L	Not Detected
ADONA	5/31/2023	<0.003 µg/L	0.003 µg/L	Not Detected
9Cl-PF3ONS	5/31/2023	<0.002 µg/L	0.002 µg/L	Not Detected
PFTrDA	5/31/2023	<0.007 µg/L	0.007 µg/L	Not Detected
PFMBA	5/31/2023	<0.003 µg/L	0.003 µg/L	Not Detected
11Cl-PF3OUdS	5/31/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFNA	5/31/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFOS	5/31/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFTA	5/31/2023	<0.008 µg/L	0.008 µg/L	Not Detected
NEtFOSAA	5/31/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFDoA	5/31/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFUnA	5/31/2023	<0.002 µg/L	0.002 µg/L	Not Detected
PFOA	5/31/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFHxA	5/31/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHxS	5/31/2023	<0.003 µg/L	0.003 µg/L	Not Detected
lithium	5/31/2023	<9 µg/L	9 µg/L	Not Detected
PFDA	5/31/2023	<0.003 µg/L	0.003 µg/L	Not Detected
NMeFOSAA	5/31/2023	<0.006 µg/L	0.006 µg/L	Not Detected
PFNA	5/31/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFDA	5/31/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFOA	5/31/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFOS	5/31/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFHxS	5/31/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHpA	5/31/2023	<0.003 µg/L	0.003 µg/L	Not Detected
NMeFOSAA	5/31/2023	<0.006 µg/L	0.006 µg/L	Not Detected
NEtFOSAA	5/31/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFDoA	5/31/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFTA	5/31/2023	<0.008 µg/L	0.008 µg/L	Not Detected
PFBA	5/31/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFTrDA	5/31/2023	<0.007 µg/L	0.007 µg/L	Not Detected
PFPeA	5/31/2023	<0.003 µg/L	0.003 µg/L	Not Detected
11Cl-PF3OUdS	5/31/2023	<0.005 µg/L	0.005 µg/L	Not Detected
lithium	5/31/2023	<9 µg/L	9 µg/L	Not Detected
PFBS	5/31/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHpS	5/31/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeS	5/31/2023	<0.004 µg/L	0.004 µg/L	Not Detected
NFDHA	5/31/2023	<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 QUINCY WATER DEPARTMENT 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 WA5370450 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 QUINCY WATER DEPARTMENT CITY OF 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
2022	cis-1,2-Dichloroethylene	MR	2	SDWIS / WA5370450 / 2380
2022	DICHLOROMETHANE	MR	2	SDWIS / WA5370450 / 2964
2022	o-Dichlorobenzene	MR	2	SDWIS / WA5370450 / 2968
2022	1,1-Dichloroethylene	MR	2	SDWIS / WA5370450 / 2977
2022	trans-1,2-Dichloroethylene	MR	2	SDWIS / WA5370450 / 2979
2022	1,2-Dichloroethane	MR	2	SDWIS / WA5370450 / 2980
2022	Trichloroethylene	MR	2	SDWIS / WA5370450 / 2984
2022	1,1,2-Trichloroethane	MR	2	SDWIS / WA5370450 / 2985
2022	CHLOROBENZENE	MR	2	SDWIS / WA5370450 / 2989
2022	Toluene	MR	2	SDWIS / WA5370450 / 2991
2022	p-Dichlorobenzene	MR	2	SDWIS / WA5370450 / 2969
2022	Vinyl chloride	MR	2	SDWIS / WA5370450 / 2976
2022	Carbon tetrachloride	MR	2	SDWIS / WA5370450 / 2982
2022	Tetrachloroethylene	MR	2	SDWIS / WA5370450 / 2987
2022	Ethylbenzene	MR	2	SDWIS / WA5370450 / 2992

How QUINCY WATER DEPARTMENT CITY OF Compares

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

Metric	QUINCY WATER DEPARTMENT CITY OF	Washington avg	Federal benchmark
Total violations	281	69	SDWA compliance — any non-zero count is a recorded breach
Health-based violations	33	4.5	Indicates a contaminant exceeded a federal MCL
PFAS detection	None	39.7%	EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served	8,415	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 QUINCY WATER DEPARTMENT CITY OF water safe to drink? ▼

QUINCY WATER DEPARTMENT CITY OF (PWS ID: WA5370450) has 281 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 8,415 people using Groundwater sources.

How many people does QUINCY WATER DEPARTMENT CITY OF serve? ▼

QUINCY WATER DEPARTMENT CITY OF serves 8,415 people in Quincy, Washington. It is a Local-owned system using Groundwater water sources with 2,763 service connections.

What type of violations does QUINCY WATER DEPARTMENT CITY OF have? ▼

QUINCY WATER DEPARTMENT CITY OF has 281 total violations: 33 health-based violations (MCL exceedances or treatment failures), 246 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in QUINCY WATER DEPARTMENT CITY OF water? ▼

No. QUINCY WATER DEPARTMENT CITY OF was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.

What water source does QUINCY WATER DEPARTMENT CITY OF use? ▼

QUINCY WATER DEPARTMENT CITY OF 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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