Hard water in Moreno Valley, CA
Reported by Eastern Municipal WD · September 2025
- CA typical
- 121 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
Tap water in Moreno Valley has about 122 mg/L of hardness, which is 7.2 grains per gallon. On the USGS scale that counts as hard. The number comes from Eastern Municipal WD, dated September 2025.
Moreno Valley sits close to the typical California figure of 121 mg/L. Of the 10 nearest cities we track, 8 have softer water and 1 has harder. The range nearby runs from 99 mg/L in Highgrove to 137 in Grand Terrace.
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 Moreno Valley's water system
No health-based violations since 2016
Serves about 659,923 people from surface water.
- Health-based
- 0
- Monitoring or reporting
- 0
- Open now
- 0
TapWaterData ties Moreno Valley to this system. EPA's service-area records do not name Moreno 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 Moreno 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 Moreno 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 Moreno 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 Moreno Valley water system had EPA violations?
EPA records show no health-based violations for Eastern Municipal WD since 2016.
Nearby cities
- Mead Valley122 mg/LHard
- Highgrove99 mg/LModerately hard
- Loma Linda99 mg/LModerately hard
- Nuevo120 mg/LHard
- Redlands111 mg/LModerately hard
- Perris120 mg/LModerately hard
- Grand Terrace137 mg/LHard
- Woodcrest99 mg/LModerately hard
- Riverside112 mg/LModerately hard
- Mentone111 mg/LModerately hard
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.