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WARDEN CITY OF

PWS ID: WA5392850 · Warden, Washington 98857

WARDEN CITY OF serves 4,674 people in Warden, Washington using Groundwater water sources. It has 219 recorded EPA violations, including 11 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (1 compound found).

Water Quality Snapshot: WARDEN CITY OF

WARDEN CITY OF is a local-owned community water system that delivers drinking water to 4,674 residents in Warden, Washington (Grant County) through 907 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 219 total violations for this system , of which 11 (5%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 205 monitoring and reporting violations are on file. The most recent violation on record dates to 2020.

The most frequently cited contaminant at this system is Diquat, recorded in 15 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 9.3 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. WARDEN CITY OF's 219 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
4,674
Total Violations
219
Health-Based Violations
11
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
907
County
Grant
School/Daycare
No
MCL Violations
11
Monitoring Violations
205
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Diquat MR 15 2008
Coliform (TCR) MCL 10 2000
cis-1,2-Dichloroethylene MR 6 2006
o-Dichlorobenzene MR 6 2006
p-Dichlorobenzene MR 6 2006
Vinyl chloride MR 6 2006
trans-1,2-Dichloroethylene MR 6 2006
1,2-Dichloroethane MR 6 2006
1,1,1-Trichloroethane MR 6 2006
Carbon tetrachloride MR 6 2006
Trichloroethylene MR 6 2006
1,1,2-Trichloroethane MR 6 2006
Benzene MR 6 2006
Toluene MR 6 2006
Ethylbenzene MR 6 2006
1,2,4-Trichlorobenzene MR 6 2006
1,1-Dichloroethylene MR 6 2006
Styrene MR 6 2006
Dalapon MR 6 2008
Picloram MR 6 2008
Dinoseb MR 6 2008
2,4,5-TP MR 6 2008
1,2-DIBROMO-3-CHLOROPROPANE MR 6 2020
ETHYLENE DIBROMIDE MR 6 2020
DICHLOROMETHANE MR 6 2006
1,2-Dichloropropane MR 6 2006
Pentachlorophenol MR 6 2008
Tetrachloroethylene MR 6 2006
CHLOROBENZENE MR 6 2006
Nitrate MR 3 2009

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 1 of 150 samples detected PFAS.

Contaminant Date Result MRL Status
PFHpS 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 8/27/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 8/27/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/27/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 8/27/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 8/27/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/27/2025 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 8/27/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFMBA 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 8/27/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFMPA 8/27/2025 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 8/27/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 8/27/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/27/2025 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 8/27/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
lithium 5/20/2025 9.3000 µg/L 9 µg/L Detected
NMeFOSAA 5/20/2025 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 5/20/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 5/20/2025 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 5/20/2025 <0.008 µg/L 0.008 µg/L Not Detected
ADONA 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 5/20/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 5/20/2025 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 5/20/2025 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 5/20/2025 <0.006 µg/L 0.006 µg/L Not Detected
PFBS 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 5/20/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 5/20/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 5/20/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 5/20/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFUnA 5/20/2025 <0.002 µg/L 0.002 µg/L Not Detected
9Cl-PF3ONS 5/20/2025 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 5/20/2025 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 5/20/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 5/20/2025 <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 WARDEN 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 WA5392850 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 WARDEN 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
2020 1,2-DIBROMO-3-CHLOROPROPANE MR 6 SDWIS / WA5392850 / 2931
2020 ETHYLENE DIBROMIDE MR 6 SDWIS / WA5392850 / 2946
2020 Nitrate MCL 1 SDWIS / WA5392850 / 1040
2017 Arsenic MR 2 SDWIS / WA5392850 / 1005
2017 Cadmium MR 2 SDWIS / WA5392850 / 1015
2017 Chromium MR 2 SDWIS / WA5392850 / 1020
2017 Mercury MR 2 SDWIS / WA5392850 / 1035
2017 Barium MR 2 SDWIS / WA5392850 / 1010
2017 Fluoride MR 2 SDWIS / WA5392850 / 1025
2017 Selenium MR 2 SDWIS / WA5392850 / 1045
2017 CYANIDE MR 1 SDWIS / WA5392850 / 1024
2017 Beryllium, Total MR 1 SDWIS / WA5392850 / 1075
2017 Nickel MR 1 SDWIS / WA5392850 / 1036
2017 Nitrite MR 1 SDWIS / WA5392850 / 1041
2017 Thallium, Total MR 1 SDWIS / WA5392850 / 1085

How WARDEN CITY OF Compares

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

Metric WARDEN CITY OF Washington avg Federal benchmark
Total violations 219 69 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 11 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 4,674 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 WARDEN CITY OF water safe to drink? ▼
WARDEN CITY OF (PWS ID: WA5392850) has 219 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 4,674 people using Groundwater sources.
How many people does WARDEN CITY OF serve? ▼
WARDEN CITY OF serves 4,674 people in Warden, Washington. It is a Local-owned system using Groundwater water sources with 907 service connections.
What type of violations does WARDEN CITY OF have? ▼
WARDEN CITY OF has 219 total violations: 11 health-based violations (MCL exceedances or treatment failures), 205 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in WARDEN CITY OF water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in WARDEN CITY OF's water supply: lithium. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does WARDEN CITY OF use? ▼
WARDEN 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.

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial