Is Millwood, WA tap water safe?
The short answer
1 of the 11 utilities serving Millwood has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Washington’s records: City of Millwood.
Spo Co Water Dist 3 Sys 1, which serves the most people here, has 2 results above the health goal. The worst: Arsenic at 5.4 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.
The water from Spo Co Water Dist 3 Sys 1 is hard, 173 mg/L (10.1 grains per gallon). How Washington’s water compares.
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 Millwood’s ZIP codes, from EPA’s estimates.
- Open report
Spo Co Water Dist 3 Sys 1
Washington · serves 19,035 people · about 300 in Millwood
2 results above the health goal. The worst: Arsenic at 5.4 ppb, above the health goal. Hardness: hard, 173 mg/L (10.1 grains per gallon).
No health-based violations since 2016
- Open report
Modern Electric Water Co
Washington · serves 18,487 people · about 210 in Millwood
1 result above the health goal. The worst: Arsenic at 3.3 ppb, above the health goal. Hardness: moderately hard to hard depending on the source, 69 to 121 mg/L (4 to 7.1 grains per gallon).
No health-based violations since 2016
- Open report
Pasadena Park Irr Dist 17
Washington · serves 6,269 people · about 130 in Millwood
2 results above the health goal. The worst: Lead at 2.6 ppb, above the health goal.
No health-based violations since 2016
- Open report
Model Irrigation Dist #18
Washington · serves 7,903 people · about 120 in Millwood
2 results above EPA’s new limit, which takes effect in 2029 and 2 results above the health goal. The worst: PFOS at 5.3 ppt, above EPA’s new limit, which takes effect in 2029.
No health-based violations since 2016
- Open report
East Spokane Water Dist 1
Washington · serves 4,285 people · about 110 in Millwood
1 result above EPA’s new limit, which takes effect in 2029 and 2 results above the health goal. The worst: PFOS at 5.5 ppt, above EPA’s new limit, which takes effect in 2029. Hardness: hard to very hard depending on the source, 123 to 222 mg/L (7.2 to 13 grains per gallon).
No health-based violations since 2016
- Open report
Orchard Avenue Irrigation Dist 6
Washington · serves 4,330 people · under 100 in Millwood
2 results above the health goal. The worst: Arsenic at 4.5 ppb, above the health goal. Hardness: hard, typically 160 mg/L (9.4 grains per gallon).
No health-based violations since 2016
- Open report
Irvin Water District #6
Washington · serves 4,150 people · under 100 in Millwood
1 result above the health goal. The worst: Arsenic at 2.8 ppb, above the health goal.
No health-based violations since 2016
- Open report
Hutchinson Irrigation Dist #16
Washington · serves 2,209 people · under 100 in Millwood
1 result above the health goal. The worst: Arsenic at 2.1 ppb, above the health goal. Hardness: moderately hard, 76 mg/L (4.5 grains per gallon).
No health-based violations since 2016
- Open report
City of Millwood
Washington · serves 1,925 people · under 100 in Millwood
2 results above the health goal. The worst: Arsenic at 4.0 ppb, above the health goal. Hardness: hard, typically 131 mg/L (7.6 grains per gallon).
1 health-based violation since 2016
- Open report
City of Spokane
Washington · serves 346,138 people · under 100 in Millwood
1 result above EPA’s new limit, which takes effect in 2029 and 2 results above the health goal. The worst: PFOS at 6.1 ppt, above EPA’s new limit, which takes effect in 2029. Hardness: moderately hard to hard depending on the source, 87 to 174 mg/L (5.1 to 10.2 grains per gallon).
No health-based violations since 2016
1 more utility in Millwood
By EPA’s estimate, each serves fewer people in Millwood than those above.
- Carnhope Irrigation District 7serves 1,602 people · under 100 in Millwood · no health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in Spo Co Water Dist 3 Sys 1’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Countertop reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 4, 2026
Certified for: Arsenic, Lead
Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic, Lead
Brondell Capella RC250 Reverse Osmosis System
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic, Lead
Water testing near Millwood
The 3 labs Washington certifies closest to Millwood, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Eurofins Spokane
Spokane Valley, WA · about 2 miles
Certified for bacteria, nitrate, minerals and other inorganics
Tshimakain Creek Laboratories
Spokane Valley, WA · about 2 miles
Certified for bacteria, nitrate, minerals and other inorganics
Anatek Labs, Inc - Spokane
Spokane, WA · about 5 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity
Which ZIP codes are in Millwood: 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 Millwood
Other towns in Spokane County with a page of their own.
What to do next
- Read Spo Co Water Dist 3 Sys 1’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for ArsenicRanked by certification and what they cost over five years.The best reverse osmosis systems, ranked
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water