Snohomish County, Washington has about 864,113 residents (Census 2024 estimate) and 119 community water systems in EPA records. The largest local system is Everett Public Works Dept. City of, serving about 215,774 people from surface water.
Public-record figures, not a test of your tap. Not 100% accurate or guaranteed. Confirm with a water test, your utility or a qualified pro before you buy or act.
Everett Public Works Dept. City of Estimate: untreated local water, not your tap · Low confidence
1.5 gpg (26 mg/L), soft
Snohomish County: median of 48,503 results from 548 monitoring sites (streams and wells). Utilities may blend or treat water, so your tap can differ.
Source: Hard Water Map county data, samples through 2016
County estimates: Hard Water Map (hardwatermap.com), CC BY 4.0, derived from the USGS/EPA Water Quality Portal; file generated 2026-07-22. License
Public-record figures, not a test of your tap. Not 100% accurate or guaranteed. Confirm with a water test, your utility or a qualified pro before you buy or act.
For a 3-person home using 57 gallons per person per day and regenerating weekly, you'd remove about 1,796 grains between regenerations. Suggested size: 24,000 grain. This uses a low-confidence county estimate, so confirm with a test first.
Estimate only. Not 100% accurate or guaranteed. Confirm with a water test, your utility or a qualified pro before you buy or act.
The 6 biggest of 119 community water systems on EPA records for this county. Service areas don't follow county lines; your water bill names your provider.
WA5324050 · serves about 215,774 people · Surface water
Lead 90th percentile: 3.5 ppb (period starting 2022-01-01) Older result. Action level: 15 ppb (drops to 10 ppb on Nov 1, 2027).
WA5301300 · serves about 245,715 people · Surface water
Lead 90th percentile: 28 ppb (period starting 1992-01-01) Older result. Action level: 15 ppb (drops to 10 ppb on Nov 1, 2027).
WA5351900 · serves about 88,582 people · Surface water
Lead 90th percentile: 2 ppb (period starting 2022-01-01) Older result. Action level: 15 ppb (drops to 10 ppb on Nov 1, 2027).
WA5349270 · serves about 68,204 people · Surface water
No lead result in this dataset.
WA5380907 · serves about 67,710 people · Surface water
Lead 90th percentile: 3.2 ppb (period starting 2022-01-01) Older result. Action level: 15 ppb (drops to 10 ppb on Nov 1, 2027).
WA5379250 · serves about 65,033 people · Surface water
No lead result in this dataset.
Public-record figures, not a test of your tap. Not 100% accurate or guaranteed. Confirm with a water test, your utility or a qualified pro before you buy or act.
A PFAS detection is not a violation. Federal limits (4 ppt for PFOA and PFOS) apply to running annual averages, with compliance required by 2029. In May 2026 EPA proposed extending the PFOA/PFOS deadline to 2031 and removing other PFAS limits; not final as of 2026-10-21.
These are public records for whole systems. Your home's pipes, fixtures and any private well can change what you drink. A certified lab test or a hardness test strip gives you your own numbers. Then use our PFAS and lead filter selector to see which certifications to look for.
None of the 6 largest systems here have a health-based violation in EPA records since October 2021. Everett Public Works Dept. City of's most recent lead 90th percentile was 3.5 ppb (2022), below the 15 ppb action level. Public records can't guarantee what comes out of your tap, especially with older plumbing, so a home test is the surest check.
There's no published utility figure in our data, but untreated local stream and well samples in Snohomish County have a median of about 1.5 grains per gallon (26 mg/L, soft). That's a low-confidence estimate of source water, not your tap, so test before you buy equipment. For a 3-person home at 1.5 gpg, our softener calculator suggests a 24,000 grain unit as a starting point.
None of the 6 sampled systems listed here detected PFAS above EPA's reporting levels in UCMR 5 testing.
Most homes are served by Everett Public Works Dept. City of or one of the other systems listed on this page, but service areas don't follow county lines. Your water bill names your provider, and its annual Consumer Confidence Report has the full test results.
Data as of October 21, 2026. Figures are copied from public records and combined with our own calculations; they can be out of date or wrong. Tapped Out isn't affiliated with any utility or the EPA. Written and reviewed by the Tapped Out team. How we calculate · All sources.