How hard is the water in Yucca Valley, CA?

Tap water hardness
110mg/L
6.4gpg
Moderately hard

Reported by Hesperia WD · January 2024

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

The water in Yucca Valley carries roughly 110 mg/L of dissolved calcium and magnesium, or 6.4 grains per gallon. That is moderately hard water. The number comes from Hesperia WD, dated January 2024.

Yucca Valley on the hardness scale, with nearby cities
060120180240300360+CA typical 121Joshua Tree: 70 mg/LJoshua Tree 70Twentynine Palms: 111 mg/LTwentynine Palms 111Thousand Palms: 113 mg/LThousand Palms 113Desert Palms: 113 mg/LDesert Palms 113Cathedral City: 138 mg/LCathedral City 138Palm Springs: 138 mg/LPalm Springs 138Rancho Mirage: 138 mg/LRancho Mirage 138Big Bear City: 161 mg/LBig Bear City 161Desert Hot Springs: 213 mg/LDesert Hot Springs 213Garnet: 213 mg/LGarnet 213Yucca Valley 110mg/L as calcium carbonate060120180240300360+CA 121Joshua Tree: 70 mg/LJoshua Tree 70Twentynine Palms: 111 mg/LTwentynine. 111Thousand Palms: 113 mg/LThousand P. 113Cathedral City: 138 mg/LCathedral. 138Desert Hot Springs: 213 mg/LDesert Hot. 213Garnet: 213 mg/LGarnet 213110 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 110 mg/L, Yucca Valley is 11 mg/L below the typical California figure of 121. Of the 10 nearest cities we track, 1 has softer water and 9 have harder. The range nearby runs from 70 mg/L in Joshua Tree to 213 in Desert Hot Springs.

What 110 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 Yucca Valley

3 people × 75 gallons a day × 6.4 gpg = 1,447 grains a day. A 24,000-grain unit regenerates about every 16 days.

Size it for your household

EPA record for Yucca Valley's water system

Hesperia WD · PWSID CA3610024

No health-based violations since 2016

Serves about 101,836 people from groundwater.

Health-based
0
Monitoring or reporting
0
Open now
0

TapWaterData ties Yucca Valley to this system. EPA's service-area records do not name Yucca Valley, 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 Yucca Valley water hard?

Somewhat. It measures about 110 mg/L (6.4 grains per gallon), which the USGS classes as moderately hard.

What is the water hardness in Yucca Valley in grains per gallon?

About 6.4 gpg. One grain per gallon equals 17.1 mg/L, so 110 mg/L divided by 17.1 gives 6.4.

What size water softener do I need in Yucca Valley?

For 3 people using 75 gallons each per day, 6.4 gpg works out to about 1,447 grains a day. A 24,000-grain softener covers that with a regeneration about every 16 days.

Has the Yucca Valley water system had EPA violations?

EPA records show no health-based violations for Hesperia WD since 2016.

Nearby cities

All 515 cities in California

Hardness data: TapWaterData US Water Hardness (utility report, January 22, 2024), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.