How hard is the water in Yucaipa, CA?

Tap water hardness
108mg/L
6.3gpg
Moderately hardReports range 59–108

Reported by San Bernardino Valley WD · August 2025

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

The water in Yucaipa carries roughly 108 mg/L of dissolved calcium and magnesium, or 6.3 grains per gallon. That is moderately hard water. The number comes from San Bernardino Valley WD, dated August 2025. Reports for this system disagree, with values from 59 to 108 mg/L.

Yucaipa on the hardness scale, with nearby cities
060120180240300360+CA typical 121Running Springs: 36 mg/LRunning Springs 36Loma Linda: 99 mg/LLoma Linda 99Highgrove: 99 mg/LHighgrove 99Mentone: 111 mg/LMentone 111Redlands: 111 mg/LRedlands 111Moreno Valley: 122 mg/LMoreno Valley 122Highland: 123 mg/LHighland 123Beaumont: 123 mg/LBeaumont 123Grand Terrace: 137 mg/LGrand Terrace 137Banning: 186 mg/LBanning 186Yucaipa 108mg/L as calcium carbonate060120180240300360+CA 121Loma Linda: 99 mg/LLoma Linda 99Mentone: 111 mg/LMentone 111Redlands: 111 mg/LRedlands 111Highland: 123 mg/LHighland 123Beaumont: 123 mg/LBeaumont 123Banning: 186 mg/LBanning 186108 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 108 mg/L, Yucaipa is 13 mg/L below the typical California figure of 121. Of the 10 nearest cities we track, 3 have softer water and 7 have harder. The range nearby runs from 36 mg/L in Running Springs to 186 in Banning.

What 108 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 Yucaipa

3 people × 75 gallons a day × 6.3 gpg = 1,415 grains a day. A 24,000-grain unit regenerates about every 16 days.

Size it for your household

EPA record for Yucaipa's water system

San Bernardino Valley WD · PWSID CA3610019

No health-based violations since 2016

Serves about 109,608 people from groundwater.

Health-based
0
Monitoring or reporting
0
Open now
0

TapWaterData ties Yucaipa to this system. EPA's service-area records do not name Yucaipa, so check the utility printed on your water bill.

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 Yucaipa water hard?

Somewhat. It measures about 108 mg/L (6.3 grains per gallon), which the USGS classes as moderately hard.

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

About 6.3 gpg. One grain per gallon equals 17.1 mg/L, so 108 mg/L divided by 17.1 gives 6.3.

What size water softener do I need in Yucaipa?

For 3 people using 75 gallons each per day, 6.3 gpg works out to about 1,415 grains a day. A 24,000-grain softener covers that with a regeneration about every 16 days.

Has the Yucaipa water system had EPA violations?

EPA records show no health-based violations for San Bernardino Valley WD since 2016.

Nearby cities

All 515 cities in California

Hardness data: TapWaterData US Water Hardness (utility report, August 4, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.