Is Tulalip Bay Water Dist #1 Tap Water Safe? Quality Report

Water source: SWP
Ownership: Native American

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

health-based violations

246

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2010-09-01 → 2010-09-30
MCL	Health-based	Resolved	2010-08-01 → 2010-08-31
MCL	Health-based	Resolved	2009-09-01 → 2009-09-30
MCL	Health-based	Archived	2002-08-01 → 2002-08-31
MCL	Health-based	Archived	1999-07-13 → 1999-08-12
MR	Monitoring	Archived	2025-10-01 → 2025-12-31
MR	Monitoring	Archived	2025-10-01 → 2025-12-31
MR	Monitoring	Resolved	2024-04-01 → 2024-06-30
MR	Monitoring	Resolved	2024-04-01 → 2024-06-30
MR	Monitoring	Resolved	2019-01-01 → 2019-12-31

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Copper	462.05 µg/L 36% of the EPA limit 1300 µg/L worst single sample: 942 µg/L	140/144	SYR4	2012–2017
Bromodichloromethane	5.075 µg/L No EPA limit set worst single sample: 6.8 µg/L	38/38	SYR4	2012–2019
Chloroform	44.445 µg/L No EPA limit set worst single sample: 46.7 µg/L	38/38	SYR4	2012–2019
Dichloroacetic Acid	19.52 µg/L No EPA limit set worst single sample: 20.2 µg/L	38/38	SYR4	2012–2019
TTHM	48.93 µg/L 61% of the EPA limit 80 µg/L worst single sample: 51.8 µg/L	38/38	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	48.51 µg/L 81% of the EPA limit 60 µg/L worst single sample: 53 µg/L	38/38	SYR4	2012–2019
Trichloroacetic Acid	28.395 µg/L No EPA limit set worst single sample: 33.6 µg/L	38/38	SYR4	2012–2019
Lead	28.5 µg/L 190% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 39 µg/L	31/144	SYR4	2012–2017
Dibromochloromethane	0.9400 µg/L No EPA limit set worst single sample: 1 µg/L	13/38	SYR4	2012–2019
Lead	0.00040 mg/L 2.7% of the EPA limit 0.0150 mg/L	12/12	LCR	2023
Monochloroacetic Acid	2.6 µg/L No EPA limit set	2/38	SYR4	2012–2019

33 contaminants tested, none detected

11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaBromoformDibromoacetic AcidHfpo-DaMonobromoacetic AcidNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaLithium

Utility contact

Contact: LESLIE, MIKE
Phone: 360-716-4840
Email: MIKELESLIE@TULALIPTRIBES-NSN.GOV

Frequently asked questions about Tulalip Bay Water Dist #1

Is Tulalip Bay Water Dist #1 tap water safe to drink?

EPA monitoring detected 11 contaminants in Tulalip Bay Water Dist #1's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Tulalip Bay Water Dist #1's water?

EPA monitoring detected Copper, Bromodichloromethane, Chloroform, Dichloroacetic Acid, TTHM, and others. The full list with the level and data source for each is above.

How many people does Tulalip Bay Water Dist #1 serve?

Tulalip Bay Water Dist #1 reports serving 5,968 people in Washington, per its EPA record.

Has Tulalip Bay Water Dist #1 had any water quality violations?

The EPA has 246 violations on file for Tulalip Bay Water Dist #1, of which 5 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.