RENTON CITY OF

Q: Is RENTON CITY OF water safe to drink?

RENTON CITY OF (PWS ID: WA5371850) has 59 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 107,119 people using Groundwater sources.

Q: How many people does RENTON CITY OF serve?

RENTON CITY OF serves 107,119 people in Renton, Washington. It is a Local-owned system using Groundwater water sources with 30,622 service connections.

Q: What type of violations does RENTON CITY OF have?

RENTON CITY OF has 59 total violations: 0 health-based violations (MCL exceedances or treatment failures), 58 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Q: Has PFAS been detected in RENTON CITY OF water?

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

Q: What water source does RENTON CITY OF use?

RENTON 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: WA5371850 · Renton, Washington 98056

RENTON CITY OF serves 107,119 people in Renton, Washington using Groundwater water sources. It has 59 recorded EPA violations, including 0 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (1 compound found).

Water Quality Snapshot: RENTON CITY OF

RENTON CITY OF is a local-owned community water system that delivers drinking water to 107,119 residents in Renton, Washington (King County) through 30,622 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 59 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 58 monitoring and reporting violations are on file. The most recent violation on record dates to 2006.

The most frequently cited contaminant at this system is Nitrate, recorded in 9 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 0.003 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. RENTON CITY OF's 59 violations sit below 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

107,119

Total Violations

Health-Based Violations

Water Source

Groundwater

System Details

System Type: Community
Owner Type: Local
Connections: 30,622
County: King
School/Daycare: No
MCL Violations: 0
Monitoring Violations: 58
Treatment Tech Violations: 0

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
Nitrate	MR	9	2006
Cadmium	MR	4	2002
Chromium	MR	4	2002
Fluoride	MR	4	2002
Mercury	MR	4	2002
Nickel	MR	4	2002
Selenium	MR	4	2002
Antimony, Total	MR	4	2002
Beryllium, Total	MR	4	2002
Thallium, Total	MR	4	2002
Barium	MR	4	2002
Arsenic	MR	4	2002
CYANIDE	MR	4	2002
Coliform (TCR)	MR	1	1992

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 1 of 180 samples detected PFAS.

Contaminant	Date	Result	MRL	Status
PFNA	9/20/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFMPA	9/20/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFHpA	9/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFTA	9/20/2023	<0.008 µg/L	0.008 µg/L	Not Detected
PFHpS	9/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeS	9/20/2023	<0.004 µg/L	0.004 µg/L	Not Detected
NFDHA	9/20/2023	<0.02 µg/L	0.02 µg/L	Not Detected
PFEESA	9/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeA	9/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
8:2 FTS	9/20/2023	<0.005 µg/L	0.005 µg/L	Not Detected
4:2 FTS	9/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
6:2 FTS	9/20/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFBA	9/20/2023	<0.005 µg/L	0.005 µg/L	Not Detected
HFPO-DA	9/20/2023	<0.005 µg/L	0.005 µg/L	Not Detected
ADONA	9/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHxS	9/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFTrDA	9/20/2023	<0.007 µg/L	0.007 µg/L	Not Detected
PFMBA	9/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
9Cl-PF3ONS	9/20/2023	<0.002 µg/L	0.002 µg/L	Not Detected
NMeFOSAA	9/20/2023	<0.006 µg/L	0.006 µg/L	Not Detected
PFBS	9/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
NEtFOSAA	9/20/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFOS	9/20/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFOA	9/20/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFDA	9/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFDoA	9/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHxA	9/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFUnA	9/20/2023	<0.002 µg/L	0.002 µg/L	Not Detected
11Cl-PF3OUdS	9/20/2023	<0.005 µg/L	0.005 µg/L	Not Detected
lithium	9/20/2023	<9 µg/L	9 µg/L	Not Detected
11Cl-PF3OUdS	9/20/2023	<0.005 µg/L	0.005 µg/L	Not Detected
NMeFOSAA	9/20/2023	<0.006 µg/L	0.006 µg/L	Not Detected
lithium	9/20/2023	<9 µg/L	9 µg/L	Not Detected
NEtFOSAA	9/20/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFTrDA	9/20/2023	<0.007 µg/L	0.007 µg/L	Not Detected
PFTA	9/20/2023	<0.008 µg/L	0.008 µg/L	Not Detected
PFPeS	9/20/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFPeA	9/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFUnA	9/20/2023	<0.002 µg/L	0.002 µg/L	Not Detected
PFOA	9/20/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFOS	9/20/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFNA	9/20/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFHpS	9/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
NFDHA	9/20/2023	<0.02 µg/L	0.02 µg/L	Not Detected
PFEESA	9/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFBS	9/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFDoA	9/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHxS	9/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFMBA	9/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHxA	9/20/2023	<0.003 µg/L	0.003 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 RENTON 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 WA5371850 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 RENTON 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
2006	Nitrate	MR	9	SDWIS / WA5371850 / 1040
2002	Cadmium	MR	4	SDWIS / WA5371850 / 1015
2002	Chromium	MR	4	SDWIS / WA5371850 / 1020
2002	Fluoride	MR	4	SDWIS / WA5371850 / 1025
2002	Mercury	MR	4	SDWIS / WA5371850 / 1035
2002	Nickel	MR	4	SDWIS / WA5371850 / 1036
2002	Selenium	MR	4	SDWIS / WA5371850 / 1045
2002	Antimony, Total	MR	4	SDWIS / WA5371850 / 1074
2002	Beryllium, Total	MR	4	SDWIS / WA5371850 / 1075
2002	Thallium, Total	MR	4	SDWIS / WA5371850 / 1085
2002	Barium	MR	4	SDWIS / WA5371850 / 1010
2002	Arsenic	MR	4	SDWIS / WA5371850 / 1005
2002	CYANIDE	MR	4	SDWIS / WA5371850 / 1024
1992	Coliform (TCR)	MR	1	SDWIS / WA5371850 / 3100

How RENTON CITY OF Compares

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

Metric	RENTON CITY OF	Washington avg	Federal benchmark
Total violations	59	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	107,119	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 RENTON CITY OF water safe to drink? ▼

RENTON CITY OF (PWS ID: WA5371850) has 59 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 107,119 people using Groundwater sources.

How many people does RENTON CITY OF serve? ▼

RENTON CITY OF serves 107,119 people in Renton, Washington. It is a Local-owned system using Groundwater water sources with 30,622 service connections.

What type of violations does RENTON CITY OF have? ▼

RENTON CITY OF has 59 total violations: 0 health-based violations (MCL exceedances or treatment failures), 58 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in RENTON CITY OF water? ▼

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

What water source does RENTON CITY OF use? ▼

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