West Linn, OR water hardness

Tap water hardness
23mg/L
1.3gpg
Soft

Reported by Lake Oswego Municipal Water · May 2025

OR typical
24 mg/L
EPA health violations since 2016
0
Data
Utility report

Tap water in West Linn has about 23 mg/L of hardness, which is 1.3 grains per gallon. On the USGS scale that counts as soft. The number comes from Lake Oswego Municipal Water, dated May 2025.

West Linn on the hardness scale, with nearby cities
060120180240300360+OR typical 24Jennings Lodge: 23 mg/LJennings Lodge 23Gladstone: 23 mg/LGladstone 23Oregon City: 23 mg/LOregon City 23Oak Grove: 23 mg/LOak Grove 23Wilsonville: 24 mg/LWilsonville 24Happy Valley: 24 mg/LHappy Valley 24Lake Oswego: 26 mg/LLake Oswego 26Oatfield: 56 mg/LOatfield 56Tualatin: 77 mg/LTualatin 77Milwaukie: 120 mg/LMilwaukie 120West Linn 23mg/L as calcium carbonate060120180240300360+OR 24Jennings Lodge: 23 mg/LJennings L. 23Gladstone: 23 mg/LGladstone 23Oregon City: 23 mg/LOregon City 23Oak Grove: 23 mg/LOak Grove 23Lake Oswego: 26 mg/LLake Oswego 26Oatfield: 56 mg/LOatfield 5623 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

At 23 mg/L, West Linn is close to the typical Oregon figure of 24 mg/L. None of the 10 nearest cities we track has softer water. The range nearby runs from 23 mg/L in Jennings Lodge to 120 in Milwaukie.

What 23 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 23 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 West Linn's water system

West Linn, City of · PWSID OR4100944

No health-based violations since 2016

Serves about 28,000 people from surface water.

Health-based
0
Monitoring or reporting
2
Open now
0

EPA lists West Linn, City of as the system serving West Linn. The hardness figure above comes from a different system's report, which TapWaterData uses for West Linn.

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 West Linn water hard?

No. It measures about 23 mg/L (1.3 grains per gallon), which the USGS classes as soft.

What is the water hardness in West Linn in grains per gallon?

About 1.3 gpg. One grain per gallon equals 17.1 mg/L, so 23 mg/L divided by 17.1 gives 1.3.

Has the West Linn water system had EPA violations?

EPA records show no health-based violations for West Linn, City of since 2016. There were also 2 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 (utility report, May 7, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.