Hard water in Jurupa Valley, CA
Reported by Jurupa Community SD · September 2025
- CA typical
- 121 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
The water in Jurupa Valley carries roughly 122 mg/L of dissolved calcium and magnesium, or 7.2 grains per gallon. That is hard water. The number comes from Jurupa Community SD, dated September 2025. Reports for this system disagree, with values from 122 to 150 mg/L.
At 122 mg/L, Jurupa Valley is close to the typical California figure of 121 mg/L. Of the 10 nearest cities we track, 8 have softer water and 2 have harder. The range nearby runs from 92 mg/L in Fontana to 139 in Colton.
What 122 mg/L means at home
Expect white crust on faucets and showerheads, plus spots on dishes that come out of the dishwasher.
Kettles collect scale quickly. Water heaters build up sediment at the bottom of the tank, which makes them work harder over time.
Soap and detergent need a little more to lather, and soap scum shows up in the tub.
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
At 122 mg/L most of the trouble is scale, and only a few things deal with it.
Ion-exchange water softener
The standard whole-house fix. It swaps calcium and magnesium for sodium or potassium and needs salt plus a drain. Size it with the calculator below.
Salt-free conditioner
No salt and no drain line. It changes how minerals form scale instead of removing them, so water still tests hard.
Reverse osmosis or carbon filter
Under-sink reverse osmosis removes minerals from drinking water only. Plain carbon filters improve taste but do not soften.
3 people × 75 gallons a day × 7.2 gpg = 1,609 grains a day. A 24,000-grain unit regenerates about every 14 days.
EPA record for Jurupa Valley's water system
No health-based violations since 2016
Serves about 134,638 people from surface water.
- Health-based
- 0
- Monitoring or reporting
- 0
- 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 Jurupa Valley water hard?
Yes. It measures about 122 mg/L (7.2 grains per gallon), which the USGS classes as hard.
What is the water hardness in Jurupa Valley in grains per gallon?
About 7.2 gpg. One grain per gallon equals 17.1 mg/L, so 122 mg/L divided by 17.1 gives 7.2.
What size water softener do I need in Jurupa Valley?
For 3 people using 75 gallons each per day, 7.2 gpg works out to about 1,609 grains a day. A 24,000-grain softener covers that with a regeneration about every 14 days.
Has the Jurupa Valley water system had EPA violations?
EPA records show no health-based violations for Jurupa Community SD since 2016.
Nearby cities
- Bloomington96 mg/LModerately hard
- Riverside112 mg/LModerately hard
- Eastvale114 mg/LModerately hard
- Norco99 mg/LModerately hard
- Fontana92 mg/LModerately hard
- Ontario104 mg/LModerately hard
- Colton139 mg/LHard
- Home Gardens99 mg/LModerately hard
- Highgrove99 mg/LModerately hard
- Grand Terrace137 mg/LHard
Hardness data: TapWaterData US Water Hardness (utility report, September 22, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.