How hard is the water in Keizer, OR?

Tap water hardness
95mg/L
5.6gpg
Moderately hard

Reported by Keizer, City of · January 2025

OR typical
24 mg/L
EPA health violations since 2016
0
Softener for 3 people
24k grain
Data
Utility report

Tap water in Keizer has about 95 mg/L of hardness, which is 5.6 grains per gallon. On the USGS scale that counts as moderately hard. The number comes from Keizer, City of, dated January 2025.

Keizer on the hardness scale, with nearby cities
060120180240300360+OR typical 24Hayesville: 16 mg/LHayesville 16Salem: 16 mg/LSalem 16Four Corners: 16 mg/LFour Corners 16Bull Mountain: 22 mg/LBull Mountain 22Wilsonville: 24 mg/LWilsonville 24Albany: 25 mg/LAlbany 25Newberg: 54 mg/LNewberg 54Sherwood: 77 mg/LSherwood 77Tualatin: 77 mg/LTualatin 77Woodburn: 84 mg/LWoodburn 84Keizer 95mg/L as calcium carbonate060120180240300360+OR 24Hayesville: 16 mg/LHayesville 16Salem: 16 mg/LSalem 16Four Corners: 16 mg/LFour Corne. 16Wilsonville: 24 mg/LWilsonville 24Newberg: 54 mg/LNewberg 54Woodburn: 84 mg/LWoodburn 8495 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 95 mg/L, Keizer is 71 mg/L above the typical Oregon figure of 24. None of the 10 nearest cities we track has harder water. The range nearby runs from 16 mg/L in Hayesville to 84 in Woodburn.

What 95 mg/L means at home

You may see faint white spots on glasses and shower doors after the water dries.

Scale builds up slowly. A kettle or coffee maker needs descaling now and then, maybe every few months.

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

Optional. Plenty of households at this level live with it and descale the kettle now and then.

Water softener

Worth a look if spots on glass bother you, or if your tankless water heater manual asks for softer water.

Carbon filter

Improves taste and removes chlorine. It leaves calcium and magnesium in place.

Softener size for Keizer

3 people × 75 gallons a day × 5.6 gpg = 1,253 grains a day. A 24,000-grain unit regenerates about every 19 days.

Size it for your household

EPA record for Keizer's water system

Keizer, City of · PWSID OR4100744

No health-based violations since 2016

Serves about 38,585 people from groundwater.

Health-based
0
Monitoring or reporting
3
Open now
0

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 Keizer water hard?

Somewhat. It measures about 95 mg/L (5.6 grains per gallon), which the USGS classes as moderately hard.

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

About 5.6 gpg. One grain per gallon equals 17.1 mg/L, so 95 mg/L divided by 17.1 gives 5.6.

What size water softener do I need in Keizer?

For 3 people using 75 gallons each per day, 5.6 gpg works out to about 1,253 grains a day. A 24,000-grain softener covers that with a regeneration about every 19 days.

Has the Keizer water system had EPA violations?

EPA records show no health-based violations for Keizer, City of since 2016. There were also 3 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, January 13, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.