Hard water in Grandview, WA
Calculated from the utility's calcium and magnesium results · August 2022
- WA typical
- 36 mg/L
- EPA health violations since 2016
- 1
- Softener for 3 people
- 24k grain
- Data
- Calculated from utility data
The water in Grandview carries roughly 208 mg/L of dissolved calcium and magnesium, or 12.2 grains per gallon. That is very hard water. TapWaterData worked it out from the calcium and magnesium levels the local utility reports (August 2022).
At 208 mg/L, Grandview is 172 mg/L above the typical Washington figure of 36. Of the 10 nearest cities we track, 9 have softer water and 1 has harder. The range nearby runs from 31 mg/L in Union Gap to 268 in Pasco.
What 208 mg/L means at home
Scale forms fast here. Kettles and coffee makers need regular descaling, and showerheads clog unless you clean them.
Tank water heaters collect mineral sediment that insulates the water from the burner, so flushing the tank matters more than usual.
Dishes and glass shower doors spot easily. Soap scum and a dull film on hair or laundry are common complaints.
Hardness is not a health problem, and EPA sets no limit for it. It is a matter of scale and soap.
What to do about it
At 208 mg/L most of the trouble is scale, and only a few things deal with it.
Ion-exchange water softener
The standard whole-house fix. It swaps calcium and magnesium for sodium or potassium and needs salt plus a drain. Size it with the calculator below.
Salt-free conditioner
No salt and no drain line. It changes how minerals form scale instead of removing them, so water still tests hard.
Reverse osmosis or carbon filter
Under-sink reverse osmosis removes minerals from drinking water only. Plain carbon filters improve taste but do not soften.
3 people × 75 gallons a day × 12.2 gpg = 2,740 grains a day. A 24,000-grain unit regenerates about every 8 days.
EPA record for Grandview's water system
1 health-based violation since 2016
Serves about 11,010 people from groundwater.
- Health-based
- 1
- Monitoring or reporting
- 43
- Open now
- 0
EPA lists this system as serving Grandview.
| Contaminant or rule | Violations | Period | Status |
|---|---|---|---|
| Nitrateoften from fertilizer or septic systems | 1 | 2020 | Resolved |
Health-based means a contaminant above its legal limit or a missed treatment step. Monitoring and reporting violations are late or missing tests and notices. Source: EPA ECHO, 2026Q3 export, violations with periods starting 2016 or later. Full EPA record.
Questions
Is Grandview water hard?
Yes. It measures about 208 mg/L (12.2 grains per gallon), which the USGS classes as very hard.
What is the water hardness in Grandview in grains per gallon?
About 12.2 gpg. One grain per gallon equals 17.1 mg/L, so 208 mg/L divided by 17.1 gives 12.2.
What size water softener do I need in Grandview?
For 3 people using 75 gallons each per day, 12.2 gpg works out to about 2,740 grains a day. A 24,000-grain softener covers that with a regeneration about every 8 days.
Has the Grandview water system had EPA violations?
EPA records show 1 health-based violation for Grandview City of since 2016, involving Nitrate. There were also 43 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Toppenish63 mg/LModerately hard
- West Richland33 mg/LSoft
- Richland89 mg/LModerately hard
- Union Gap31 mg/LSoft
- Terrace Heights88 mg/LModerately hard
- Kennewick96 mg/LModerately hard
- Pasco268 mg/LVery hard
- Yakima39 mg/LSoft
- Selah147 mg/LHard
- Finley96 mg/LModerately hard
Hardness data: TapWaterData US Water Hardness (calculated from utility data, August 15, 2022), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.