Wilsonville, OR water hardness

Tap water hardness
24mg/L
1.4gpg
SoftCounty estimate

County estimate from 686 water samples in Clackamas County · July 2026

OR typical
24 mg/L
EPA health violations since 2016
0
Data
County estimate

Water samples from around Wilsonville put hardness at about 24 mg/L (1.4 gpg), which would be soft on the USGS scale. Treat this as a rough guide: it is the median of 686 samples taken across Clackamas County, mostly wells and streams, not a test of Wilsonville's treated tap water. One more reason for caution: EPA lists Wilsonville's water system as using surface water, which is often softer than the wells behind the county figure.

Wilsonville on the hardness scale, with nearby cities
060120180240300360+OR typical 24Bull Mountain: 22 mg/LBull Mountain 22Tigard: 22 mg/LTigard 22West Linn: 23 mg/LWest Linn 23Oregon City: 23 mg/LOregon City 23Jennings Lodge: 23 mg/LJennings Lodge 23Oak Grove: 23 mg/LOak Grove 23Lake Oswego: 26 mg/LLake Oswego 26Newberg: 54 mg/LNewberg 54Tualatin: 77 mg/LTualatin 77Sherwood: 77 mg/LSherwood 77Wilsonville 24mg/L as calcium carbonate060120180240300360+OR 24Bull Mountain: 22 mg/LBull Mount. 22Tigard: 22 mg/LTigard 22West Linn: 23 mg/LWest Linn 23Lake Oswego: 26 mg/LLake Oswego 26Tualatin: 77 mg/LTualatin 77Sherwood: 77 mg/LSherwood 7724 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Wilsonville sits close to the typical Oregon figure of 24 mg/L. Of the 10 nearest cities we track, 6 have softer water and 4 have harder. The range nearby runs from 22 mg/L in Bull Mountain to 77 in Tualatin.

What 24 mg/L means at home

Soap and shampoo lather with very little product. Kettles and showerheads stay mostly free of white crust.

Some people notice that soap feels slow to rinse off in soft water. That slippery feel is normal and harmless.

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

Nothing, as far as hardness goes. At 24 mg/L a softener would have almost nothing to remove.

Carbon filter

If the water tastes of chlorine, a pitcher or faucet carbon filter takes care of that. It does not change hardness.

EPA record for Wilsonville's water system

Wilsonville, City of · PWSID OR4100954

No health-based violations since 2016

Serves about 25,915 people from surface water.

Health-based
0
Monitoring or reporting
10
Open now
0

EPA lists this system as serving Wilsonville.

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 Wilsonville water hard?

No. It measures about 24 mg/L (1.4 grains per gallon), which the USGS classes as soft.

What is the water hardness in Wilsonville in grains per gallon?

About 1.4 gpg. One grain per gallon equals 17.1 mg/L, so 24 mg/L divided by 17.1 gives 1.4.

Has the Wilsonville water system had EPA violations?

EPA records show no health-based violations for Wilsonville, City of since 2016. There were also 10 monitoring or reporting violations, which are about late or missing tests and notices.

Nearby cities

All 53 cities in Oregon

Hardness data: TapWaterData US Water Hardness (county estimate, July 4, 2026), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.