How hard is the water in Perris, CA?

Tap water hardness
120mg/L
7.0gpg
Moderately hard

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 Perris has about 120 mg/L of hardness, which is 7.0 grains per gallon. On the USGS scale that counts as moderately hard. The number comes from Eastern Municipal WD, dated September 2025.

Perris on the hardness scale, with nearby cities
060120180240300360+CA typical 121Woodcrest: 99 mg/LWoodcrest 99Lake Elsinore: 111 mg/LLake Elsinore 111Canyon Lake: 118 mg/LCanyon Lake 118Good Hope: 120 mg/LGood Hope 120Nuevo: 120 mg/LNuevo 120Homeland: 120 mg/LHomeland 120Menifee: 120 mg/LMenifee 120Mead Valley: 122 mg/LMead Valley 122Moreno Valley: 122 mg/LMoreno Valley 122Lake Mathews: 140 mg/LLake Mathews 140Perris 120mg/L as calcium carbonate060120180240300360+CA 121Canyon Lake: 118 mg/LCanyon Lake 118Good Hope: 120 mg/LGood Hope 120Nuevo: 120 mg/LNuevo 120Homeland: 120 mg/LHomeland 120Menifee: 120 mg/LMenifee 120Mead Valley: 122 mg/LMead Valley 122120 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Perris sits close to the typical California figure of 121 mg/L. Of the 10 nearest cities we track, 3 have softer water and 3 have harder. The range nearby runs from 99 mg/L in Woodcrest to 140 in Lake Mathews.

What 120 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 Perris

3 people × 75 gallons a day × 7.0 gpg = 1,580 grains a day. A 24,000-grain unit regenerates about every 15 days.

Size it for your household

EPA record for Perris's water system

Eastern Municipal WD · PWSID CA3310009

No health-based violations since 2016

Serves about 659,923 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 Perris water hard?

Somewhat. It measures about 120 mg/L (7.0 grains per gallon), which the USGS classes as moderately hard.

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

About 7.0 gpg. One grain per gallon equals 17.1 mg/L, so 120 mg/L divided by 17.1 gives 7.0.

What size water softener do I need in Perris?

For 3 people using 75 gallons each per day, 7.0 gpg works out to about 1,580 grains a day. A 24,000-grain softener covers that with a regeneration about every 15 days.

Has the Perris water system had EPA violations?

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

Nearby cities

All 515 cities in California

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