Is Granite Falls City of Tap Water Safe? Quality Report

Water source: SWP
Ownership: Local government
Counties served: Snohomish

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

violations on file

still open

Violation	Type	Status	Period
MR	Monitoring	Resolved	2014-10-01 → 2014-12-31
MR	Monitoring	Resolved	2014-10-01 → 2014-12-31
Other	Monitoring	Resolved	2010-07-01
Other	Monitoring	Resolved	1999-10-19 → 1999-12-31
MR	Monitoring	Archived	1979-10-01 → 1979-10-31

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
Chloroform	48.8 µg/L No EPA limit set worst single sample: 50.5 µg/L	29/30	SYR4	2012–2019
TTHM	51.44 µg/L 64% of the EPA limit 80 µg/L worst single sample: 52.7 µg/L	29/29	SYR4	2012–2019
Trichloroacetic Acid	19.86 µg/L No EPA limit set worst single sample: 25 µg/L	29/30	SYR4	2012–2019
Bromodichloromethane	5.515 µg/L No EPA limit set worst single sample: 6.5 µg/L	28/29	SYR4	2012–2019
Dichloroacetic Acid	13.12 µg/L No EPA limit set worst single sample: 13.8 µg/L	28/29	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	32.425 µg/L 54% of the EPA limit 60 µg/L worst single sample: 38.62 µg/L	28/29	SYR4	2012–2019
Dibromochloromethane	2.5 µg/L No EPA limit set worst single sample: 3.2 µg/L	21/28	SYR4	2012–2019
Lead	0.0030 mg/L 20% of the EPA limit 0.0150 mg/L	5/5	LCR	2024
Monochloroacetic Acid	2.636 µg/L No EPA limit set worst single sample: 2.66 µg/L	3/30	SYR4	2012–2019
Bromoform	0.5000 µg/L No EPA limit set	2/30	SYR4	2012–2019
Dibromoacetic Acid	1.2 µg/L No EPA limit set	1/30	SYR4	2012–2019

31 contaminants tested, none detected

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Utility contact

Contact: Charles White

Frequently asked questions about Granite Falls City of

Is Granite Falls City of tap water safe to drink?

EPA monitoring detected 11 contaminants in Granite Falls City of'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 Granite Falls City of's water?

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

How many people does Granite Falls City of serve?

Granite Falls City of reports serving 5,349 people in Washington, per its EPA record.

Has Granite Falls City of had any water quality violations?

The EPA has 5 violations on file for Granite Falls City of, of which 0 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.