Is Maltby, WA tap water safe?
The short answer
1 of the 6 utilities serving Maltby has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Washington’s records: Alderwood Water District.
Woodinville Water District, which serves the most people here, has nothing above a health goal in EPA’s and Washington’s records. That data covers what its report lists, not everything.
A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Maltby’s ZIP codes, from EPA’s estimates.
- Open report
Woodinville Water District
Washington · serves 66,699 people · about 7,200 in Maltby
Nothing in its records is above a health goal.
No health-based violations since 2016
- Open report
Cross Valley Water District
Washington · serves 24,695 people · about 6,000 in Maltby
2 results above the health goal. The worst: Arsenic at 4.7 ppb, above the health goal.
No health-based violations since 2016
- Open report
Silver Lake Water & Sewer District
Washington · serves 65,033 people · about 3,500 in Maltby
Nothing in its records is above a health goal.
No health-based violations since 2016
- Open report
Alderwood Water District
Washington · serves 245,715 people · about 3,500 in Maltby
1 result above the action level. The worst: Lead at 28 ppb, above the action level.
No health-based violations since 2016
- Open report
Aqua Copia/Horse Country Estates
Washington · serves 250 people · under 100 in Maltby
1 result above the health goal. The worst: Arsenic at 8.1 ppb, above the health goal. Hardness: moderately hard, 119 mg/L (7 grains per gallon).
No health-based violations since 2016
- Open report
Wandering Creek Homeowners Assoc
Washington · serves 457 people · under 100 in Maltby
Nothing in its records is above a health goal.
No health-based violations since 2016
Water testing near Maltby
The 3 labs Washington certifies closest to Maltby, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
OnSite Environmental, Inc.
Redmond, WA · about 7 miles
Certified for lead and copper, metals, minerals and other inorganics
Brooks Applied Labs, LLC
Seattle, WA · about 9 miles
Certified for lead and copper, metals
IEH Analytical Laboratories
Seattle, WA · about 9 miles
Certified for nitrate, lead and copper, metals, minerals and other inorganics, PFAS
Which ZIP codes are in Maltby: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: Washington State Department of Ecology, Lab Accreditation Program, environmental laboratories accredited for drinking water analyses; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Maltby
Other towns in Snohomish County with a page of their own.
What to do next
- Read Woodinville Water District’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Decide if you want a filter at allA filter for taste or chlorine is a preference, not a need. The standards say what each kind can do.NSF/ANSI standards, decoded
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water