Is Grandview, WA tap water safe?
The short answer
2 of the 3 utilities serving Grandview have 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 Grandview and Wilgus Housing Water System.
City of Grandview, which serves the most people here, has 1 result above the legal limit, 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Nitrate at 10.7 ppm, above the legal limit.
The water from City of Grandview is hard to very hard depending on the source, 132 to 230 mg/L (7.7 to 13.5 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 Grandview’s ZIP codes, from EPA’s estimates.
- Open report
City of Grandview
Washington · serves 11,010 people · about 1,100 in Grandview
1 result above the legal limit, 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Nitrate at 10.7 ppm, above the legal limit. Hardness: hard to very hard depending on the source, 132 to 230 mg/L (7.7 to 13.5 grains per gallon).
1 health-based violation since 2016
- Open report
Wilgus Housing Water System
Washington · serves 121 people · under 100 in Grandview
1 result above the legal limit and 1 result above the health goal. The worst: Nitrate at 11.8 ppm, above the legal limit.
1 health-based violation since 2016
- Open report
Wyckoff Farms
Washington · serves 131 people · under 100 in Grandview
1 result above the health goal. The worst: Arsenic at 4.6 ppb, above the health goal. Hardness: moderately hard, typically 81 mg/L (4.8 grains per gallon).
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 City of Grandview’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: Nitrate, 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: Nitrate, Arsenic, Lead
Culligan 10-Cup Pitcher with ZeroWater Technology (ZEROP10)
Pitcher
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 9, 2026
Certified for: Nitrate, Lead
Water testing near Grandview
The 3 labs Washington certifies closest to Grandview, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Ag Health Laboratories, Inc.
Sunnyside, WA · about 27 miles
Certified for bacteria, nitrate
Energy NW Environmental (PPL) Lab
Richland, WA · about 34 miles
Certified for bacteria
Energy Northwest Environmental Services Lab
Richland, WA · about 34 miles
Certified for nitrate, lead and copper, metals, minerals and other inorganics
Which ZIP codes are in Grandview: 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 Grandview
Towns nearby with a page of their own.
What to do next
- Read City of Grandview’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for NitrateRanked 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