How hard is the water in Home Gardens, CA?

Tap water hardness
99mg/L
5.8gpg
Moderately hard

Reported by Riverside, City of · September 2025

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

Home Gardens water measures 99 mg/L (5.8 gpg) of hardness, moderately hard by USGS standards. The number comes from Riverside, City of, dated September 2025.

Home Gardens on the hardness scale, with nearby cities
060120180240300360+CA typical 121Chino Hills: 81 mg/LChino Hills 81Bloomington: 96 mg/LBloomington 96Norco: 99 mg/LNorco 99Woodcrest: 99 mg/LWoodcrest 99Ontario: 104 mg/LOntario 104Riverside: 112 mg/LRiverside 112Eastvale: 114 mg/LEastvale 114Jurupa Valley: 122 mg/LJurupa Valley 122Mead Valley: 122 mg/LMead Valley 122Lake Mathews: 140 mg/LLake Mathews 140Home Gardens 99mg/L as calcium carbonate060120180240300360+CA 121Norco: 99 mg/LNorco 99Woodcrest: 99 mg/LWoodcrest 99Riverside: 112 mg/LRiverside 112Eastvale: 114 mg/LEastvale 114Jurupa Valley: 122 mg/LJurupa Val. 122Lake Mathews: 140 mg/LLake Mathe. 14099 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 99 mg/L, Home Gardens is 22 mg/L below the typical California figure of 121. Of the 10 nearest cities we track, 2 have softer water and 6 have harder. The range nearby runs from 81 mg/L in Chino Hills to 140 in Lake Mathews.

What 99 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 Home Gardens

3 people × 75 gallons a day × 5.8 gpg = 1,303 grains a day. A 24,000-grain unit regenerates about every 18 days.

Size it for your household

EPA record for Home Gardens's water system

Home Gardens County WD · PWSID CA3310018

No health-based violations since 2016

Serves about 3,095 people from surface water.

Health-based
0
Monitoring or reporting
0
Open now
0

EPA lists Home Gardens County WD as the system serving Home Gardens. The hardness figure above comes from a different system's report, which TapWaterData uses for Home Gardens.

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 Home Gardens water hard?

Somewhat. It measures about 99 mg/L (5.8 grains per gallon), which the USGS classes as moderately hard.

What is the water hardness in Home Gardens in grains per gallon?

About 5.8 gpg. One grain per gallon equals 17.1 mg/L, so 99 mg/L divided by 17.1 gives 5.8.

What size water softener do I need in Home Gardens?

For 3 people using 75 gallons each per day, 5.8 gpg works out to about 1,303 grains a day. A 24,000-grain softener covers that with a regeneration about every 18 days.

Has the Home Gardens water system had EPA violations?

EPA records show no health-based violations for Home Gardens County WD since 2016.

Nearby cities

All 515 cities in California

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.