How hard is the water in Laguna Beach, CA?

Tap water hardness
98mg/L
5.7gpg
Moderately hardReports range 35–117

Reported by Irvine Ranch Water District · October 2025

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

Laguna Beach water measures 98 mg/L (5.7 gpg) of hardness, moderately hard by USGS standards. The number comes from Irvine Ranch Water District, dated October 2025. Reports for this system disagree, with values from 35 to 117 mg/L.

Laguna Beach on the hardness scale, with nearby cities
060120180240300360+CA typical 121Irvine: 98 mg/LIrvine 98Newport Beach: 102 mg/LNewport Beach 102Laguna Woods: 108 mg/LLaguna Woods 108Laguna Niguel: 151 mg/LLaguna Niguel 151San Juan Capistrano: 158 mg/LSan Juan Capistrano 158Ladera Ranch: 158 mg/LLadera Ranch 158Las Flores: 158 mg/LLas Flores 158Mission Viejo: 159 mg/LMission Viejo 159Aliso Viejo: 160 mg/LAliso Viejo 160Laguna Hills: 160 mg/LLaguna Hills 160Laguna Beach 98mg/L as calcium carbonate060120180240300360+CA 121Laguna Woods: 108 mg/LLaguna Woo. 108Laguna Niguel: 151 mg/LLaguna Nig. 151San Juan Capistrano: 158 mg/LSan Juan C. 158Ladera Ranch: 158 mg/LLadera Ran. 158Aliso Viejo: 160 mg/LAliso Viejo 160Laguna Hills: 160 mg/LLaguna Hil. 16098 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Laguna Beach sits 23 mg/L below the typical California figure of 121. None of the 10 nearest cities we track has softer water. The range nearby runs from 98 mg/L in Irvine to 160 in Aliso Viejo.

What 98 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 Laguna Beach

3 people × 75 gallons a day × 5.7 gpg = 1,292 grains a day. A 24,000-grain unit regenerates about every 18 days.

Size it for your household

EPA record for Laguna Beach's water system

Laguna Beach County WD · PWSID CA3010017

No health-based violations since 2016

Serves about 18,862 people from surface water.

Health-based
0
Monitoring or reporting
0
Open now
0

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

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 Laguna Beach water hard?

Somewhat. It measures about 98 mg/L (5.7 grains per gallon), which the USGS classes as moderately hard.

What is the water hardness in Laguna Beach in grains per gallon?

About 5.7 gpg. One grain per gallon equals 17.1 mg/L, so 98 mg/L divided by 17.1 gives 5.7.

What size water softener do I need in Laguna Beach?

For 3 people using 75 gallons each per day, 5.7 gpg works out to about 1,292 grains a day. A 24,000-grain softener covers that with a regeneration about every 18 days.

Has the Laguna Beach water system had EPA violations?

EPA records show no health-based violations for Laguna Beach County WD since 2016.

Nearby cities

All 515 cities in California

Hardness data: TapWaterData US Water Hardness (utility report, October 6, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.