Hard water in Artesia, CA
Reported by Liberty Utilities - Bellflower-Norwalk · May 2025
- CA typical
- 121 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
The water in Artesia carries roughly 126 mg/L of dissolved calcium and magnesium, or 7.3 grains per gallon. That is hard water. The number comes from Liberty Utilities - Bellflower-Norwalk, dated May 2025.
At 126 mg/L, Artesia is close to the typical California figure of 121 mg/L. Of the 10 nearest cities we track, 2 have softer water and 8 have harder. The range nearby runs from 61 mg/L in Santa Fe Springs to 196 in Cypress.
What 126 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 126 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 × 7.3 gpg = 1,652 grains a day. A 24,000-grain unit regenerates about every 14 days.
EPA record for Artesia's water system
No health-based violations since 2016
Serves about 72,472 people from surface water.
- Health-based
- 0
- Monitoring or reporting
- 0
- Open now
- 0
TapWaterData ties Artesia to this system. EPA's service-area records do not name Artesia, 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 Artesia water hard?
Yes. It measures about 126 mg/L (7.3 grains per gallon), which the USGS classes as hard.
What is the water hardness in Artesia in grains per gallon?
About 7.3 gpg. One grain per gallon equals 17.1 mg/L, so 126 mg/L divided by 17.1 gives 7.3.
What size water softener do I need in Artesia?
For 3 people using 75 gallons each per day, 7.3 gpg works out to about 1,652 grains a day. A 24,000-grain softener covers that with a regeneration about every 14 days.
Has the Artesia water system had EPA violations?
EPA records show no health-based violations for Liberty Utilities - Bellflower-Norwalk since 2016.
Nearby cities
- Cerritos135 mg/LHard
- La Palma177 mg/LHard
- Lakewood177 mg/LHard
- Norwalk136 mg/LHard
- Bellflower119 mg/LModerately hard
- Cypress196 mg/LVery hard
- Buena Park154 mg/LHard
- Santa Fe Springs61 mg/LModerately hard
- La Mirada174 mg/LHard
- Los Alamitos196 mg/LVery hard
Hardness data: TapWaterData US Water Hardness (utility report, May 1, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.