TULALIP BAY WATER DIST #1

Q: Is TULALIP BAY WATER DIST #1 water safe to drink?

TULALIP BAY WATER DIST #1 (PWS ID: 105300003) has 248 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 5,968 people using Surface Water sources.

Q: What type of violations does TULALIP BAY WATER DIST #1 have?

TULALIP BAY WATER DIST #1 has 248 total violations: 5 health-based violations (MCL exceedances or treatment failures), 232 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Q: Has PFAS been detected in TULALIP BAY WATER DIST #1 water?

No. TULALIP BAY WATER DIST #1 was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.

Q: What water source does TULALIP BAY WATER DIST #1 use?

TULALIP BAY WATER DIST #1 uses Surface Water 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 5, 2026

PWS ID: 105300003 · TULALIP, 10 98271

TULALIP BAY WATER DIST #1 serves 5,968 people in TULALIP, 10 using Surface Water water sources. It has 248 recorded EPA violations, including 5 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: TULALIP BAY WATER DIST #1

TULALIP BAY WATER DIST #1 is a native american-owned community water system that delivers drinking water to 5,968 residents in TULALIP, 10 through 1,908 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 248 total violations for this system , of which 5 (2%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 232 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 41 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 10, EPA tracks 158 public water systems serving 142,574 people, with 31,953 cumulative violations and 1,055 health-based violations on record. About 98% of systems in the state carry at least one violation, and state-wide the average per system is 202.2 violations. TULALIP BAY WATER DIST #1's 248 violations sit above the 10 average. Statewide, 2 of 10 UCMR5-tested systems have reported PFAS detections (20%). 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

5,968

Total Violations

248

Health-Based Violations

Water Source

Surface Water

System Details

System Type: Community
Owner Type: Native American
Connections: 1,908
School/Daycare: No
MCL Violations: 5
Monitoring Violations: 232
Treatment Tech Violations: 0

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
Coliform (TCR)	MR	41	2014
Chlorine	MR	12	2018
Nitrate	MR	12	2019
Consumer Confidence Rule	Other	6	2015
Coliform (TCR)	MCL	5	2010
Combined Radium (-226 and -228)	MR	5	2008
Gross Alpha, Excl. Radon and U	MR	5	2008
Toluene	MR	4	2011
Combined Uranium	MR	4	2008
Atrazine	MR	3	2008
Barium	MR	3	2008
CYANIDE	MR	3	2008
Nickel	MR	3	2008
Beryllium, Total	MR	3	2008
Asbestos	MR	3	2008
Selenium	MR	3	2008
TTHM	MR	3	2024
Cadmium	MR	3	2008
Chromium	MR	3	2008
Antimony, Total	MR	3	2008
Thallium, Total	MR	3	2008
Fluoride	MR	3	2008
Mercury	MR	3	2008
Arsenic	MR	3	2008
Benzene	MR	3	2008
Trichloroethylene	MR	2	2008
1,1,2-Trichloroethane	MR	2	2008
Tetrachloroethylene	MR	2	2008
Styrene	MR	2	2008
Toxaphene	MR	2	2008

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 120 samples detected PFAS.

Contaminant	Date	Result	MRL	Status
HFPO-DA	9/13/2023	<0.005 µg/L	0.005 µg/L	Not Detected
11Cl-PF3OUdS	9/13/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFHxS	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHpA	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFNA	9/13/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFOS	9/13/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFOA	9/13/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFDoA	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFBS	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFUnA	9/13/2023	<0.002 µg/L	0.002 µg/L	Not Detected
PFPeA	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
NMeFOSAA	9/13/2023	<0.006 µg/L	0.006 µg/L	Not Detected
NEtFOSAA	9/13/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFTrDA	9/13/2023	<0.007 µg/L	0.007 µg/L	Not Detected
PFTA	9/13/2023	<0.008 µg/L	0.008 µg/L	Not Detected
PFHpS	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeS	9/13/2023	<0.004 µg/L	0.004 µg/L	Not Detected
NFDHA	9/13/2023	<0.02 µg/L	0.02 µg/L	Not Detected
9Cl-PF3ONS	9/13/2023	<0.002 µg/L	0.002 µg/L	Not Detected
PFMBA	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
lithium	9/13/2023	<9 µg/L	9 µg/L	Not Detected
PFMPA	9/13/2023	<0.004 µg/L	0.004 µg/L	Not Detected
8:2 FTS	9/13/2023	<0.005 µg/L	0.005 µg/L	Not Detected
4:2 FTS	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
6:2 FTS	9/13/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFBA	9/13/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFDA	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
ADONA	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFEESA	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHxA	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
NFDHA	6/5/2023	<0.02 µg/L	0.02 µg/L	Not Detected
PFUnA	6/5/2023	<0.002 µg/L	0.002 µg/L	Not Detected
11Cl-PF3OUdS	6/5/2023	<0.005 µg/L	0.005 µg/L	Not Detected
9Cl-PF3ONS	6/5/2023	<0.002 µg/L	0.002 µg/L	Not Detected
ADONA	6/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
HFPO-DA	6/5/2023	<0.005 µg/L	0.005 µg/L	Not Detected
6:2 FTS	6/5/2023	<0.005 µg/L	0.005 µg/L	Not Detected
lithium	6/5/2023	<9 µg/L	9 µg/L	Not Detected
8:2 FTS	6/5/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFMPA	6/5/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFHpS	6/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFMBA	6/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFBA	6/5/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFPeS	6/5/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFEESA	6/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHxA	6/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeA	6/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHxS	6/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
4:2 FTS	6/5/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFDoA	6/5/2023	<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 TULALIP BAY WATER DIST #1.

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 105300003 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

10 Drinking Water Authority

10'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 10 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
2024	TTHM	MR	3	SDWIS / 105300003 / 2950
2024	Total Haloacetic Acids (HAA5)	MR	2	SDWIS / 105300003 / 2456
2019	Nitrate	MR	12	SDWIS / 105300003 / 1040
2018	Chlorine	MR	12	SDWIS / 105300003 / 0999
2017	Revised Total Coliform Rule	RPT	1	SDWIS / 105300003 / 8000
2017	Revised Total Coliform Rule	MON	1	SDWIS / 105300003 / 8000
2015	Consumer Confidence Rule	Other	6	SDWIS / 105300003 / 7000
2014	Coliform (TCR)	MR	41	SDWIS / 105300003 / 3100
2013	Lead and Copper Rule	MR	2	SDWIS / 105300003 / 5000
2011	Toluene	MR	4	SDWIS / 105300003 / 2991
2010	Coliform (TCR)	MCL	5	SDWIS / 105300003 / 3100
2008	Combined Radium (-226 and -228)	MR	5	SDWIS / 105300003 / 4010
2008	Gross Alpha, Excl. Radon and U	MR	5	SDWIS / 105300003 / 4000
2008	Combined Uranium	MR	4	SDWIS / 105300003 / 4006
2008	Atrazine	MR	3	SDWIS / 105300003 / 2050

How TULALIP BAY WATER DIST #1 Compares

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

Metric	TULALIP BAY WATER DIST #1	10 avg	Federal benchmark
Total violations	248	202.2	SDWA compliance — any non-zero count is a recorded breach
Health-based violations	5	6.7	Indicates a contaminant exceeded a federal MCL
PFAS detection	None	20%	EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served	5,968	902	Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 158 regulated public water systems in 10.

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 TULALIP BAY WATER DIST #1 water safe to drink? ▼

TULALIP BAY WATER DIST #1 (PWS ID: 105300003) has 248 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 5,968 people using Surface Water sources.

How many people does TULALIP BAY WATER DIST #1 serve? ▼

TULALIP BAY WATER DIST #1 serves 5,968 people in TULALIP, 10. It is a Native American-owned system using Surface Water water sources with 1,908 service connections.

What type of violations does TULALIP BAY WATER DIST #1 have? ▼

TULALIP BAY WATER DIST #1 has 248 total violations: 5 health-based violations (MCL exceedances or treatment failures), 232 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in TULALIP BAY WATER DIST #1 water? ▼

No. TULALIP BAY WATER DIST #1 was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.

What water source does TULALIP BAY WATER DIST #1 use? ▼

TULALIP BAY WATER DIST #1 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.

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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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