Hard water in Lakewood, CA
Reported by Lakewood - City, Water Dept. · April 2025
- CA typical
- 121 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
Lakewood water measures 177 mg/L (10.3 gpg) of hardness, hard by USGS standards. The number comes from Lakewood - City, Water Dept., dated April 2025.
Lakewood sits 56 mg/L above the typical California figure of 121. Of the 10 nearest cities we track, 6 have softer water and 3 have harder. The range nearby runs from 108 mg/L in Paramount to 196 in Rossmoor.
What 177 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 177 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 × 10.3 gpg = 2,329 grains a day. A 24,000-grain unit regenerates about every 10 days.
EPA record for Lakewood's water system
No health-based violations since 2016
Serves about 66,356 people from groundwater.
- 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 Lakewood water hard?
Yes. It measures about 177 mg/L (10.3 grains per gallon), which the USGS classes as hard.
What is the water hardness in Lakewood in grains per gallon?
About 10.3 gpg. One grain per gallon equals 17.1 mg/L, so 177 mg/L divided by 17.1 gives 10.3.
What size water softener do I need in Lakewood?
For 3 people using 75 gallons each per day, 10.3 gpg works out to about 2,329 grains a day. A 24,000-grain softener covers that with a regeneration about every 10 days.
Has the Lakewood water system had EPA violations?
EPA records show no health-based violations for Lakewood - City, Water Dept. since 2016.
Nearby cities
- Artesia126 mg/LHard
- Bellflower119 mg/LModerately hard
- Cerritos135 mg/LHard
- Paramount108 mg/LModerately hard
- Rossmoor196 mg/LVery hard
- Norwalk136 mg/LHard
- La Palma177 mg/LHard
- Los Alamitos196 mg/LVery hard
- Cypress196 mg/LVery hard
- Long Beach171 mg/LHard
Hardness data: TapWaterData US Water Hardness (utility report, April 16, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.