Is Tap Water Safe to Drink in Everett & the Seattle Area?

By Frank Gaborik | September 20, 2024

Is Tap Water Safe to Drink in Everett & the Seattle Area?

Glass more than half full

Short answer: yes. The longer answer involves where your specific home gets its water, what the plumbing inside the house does to it, and what year your supply lines were installed. We get this question routinely from Everett homeowners who’ve just moved here from places with worse municipal water, and the practical answer almost always comes down to the house, not the source.

What’s in Everett’s Tap Water at the Source

The City of Everett sources water primarily from Spada Lake Reservoir via the Sultan River — surface water from a protected watershed in the Cascade foothills. Treatment is conventional: chlorination, filtration, fluoridation (0.7 ppm target, in line with CDC recommendations). Hardness runs about 50–70 ppm calcium carbonate, which is at the soft-to-moderately-soft end of the scale. By US standards, Everett tap water is exceptionally clean at the meter — well below EPA maximum contaminant levels on every regulated substance.

Seattle’s water (for residents who fall under SPU service) comes from Cedar River and Tolt River watersheds. Different source, similar treatment philosophy, similar overall quality profile. Lake Stevens, Mill Creek, Mukilteo — most Snohomish County municipal water sources are surface-water-based and meet the same federal standards. The annual Consumer Confidence Report from your water utility lists exactly what’s tested for and at what levels.

Where the Water Gets Worse: The House Itself

The most common cause of bad-tasting or visibly off tap water in an Everett home is the home’s own plumbing. Galvanized steel supply lines from the 1950s–80s corrode internally over time, releasing iron, manganese, and occasional lead solder fragments from the joint connections. Homes around Riverside, Northwest Everett, and Pinehurst are most likely to still have original galvanized. We’ve tested water samples from older homes where the tap quality at a kitchen sink was meaningfully worse than the water entering the house — same source, different journey.

Lead is the bigger concern. Federal lead solder ban dates to 1986, so anything pre-1986 may have lead solder joints. Lead service lines are rarer in Everett than in some Eastern cities, but they exist. If your home was built before 1986, especially before 1970, get a lead test on the actual tap water (not just the source water). Tests are about $40 from most certified labs.

When a Filter Is Actually Worth It

For most Everett homes on city water with modern plumbing, a filter is preference, not necessity. The taste is fine, the safety is fine, the marketing budget for filter companies is enormous. That said: if your home has galvanized supply or pre-1986 plumbing, a point-of-use carbon filter at the kitchen sink is cheap insurance ($40–$120 install, $20–$40 annually for replacement cartridges). It removes the residual iron taste, captures any sediment, and reduces chlorine if you notice the smell.

If you’ve got a well (some Snohomish County areas outside city limits still do), filtration becomes more important. Surface water sources from individual wells need different treatment than municipal water. The annual home plumbing inspection should include water quality testing if you’re on a well.

What to Do If You’re Concerned

Get a tap water test from a certified lab. EPA-approved labs are listed at the Washington Department of Ecology site. Test cost is $40–$150 depending on what you’re testing for. If the test shows elevated metals, the next question is whether the source is the home’s plumbing or external — easy to determine by testing water from both the meter and an interior tap.

If the home plumbing is the source — galvanized lines, lead solder, deteriorating fittings — replacement of the affected supply lines is the durable fix. Our walkthrough of the three plumbing systems every Everett home runs on covers the supply side. Our whole-house repiping team handles the work, and our Everett plumbing crew can do a water-quality-focused inspection if you want eyes on it before testing.

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