Hard water in Inglewood, CA
Reported by GSWC - Southwest · 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 Inglewood has about 195 mg/L of hardness, which is 11.4 grains per gallon. On the USGS scale that counts as very hard. The number comes from GSWC - Southwest, dated September 2025.
Inglewood sits 74 mg/L above the typical California figure of 121. None of the 10 nearest cities we track has harder water. The range nearby runs from 122 mg/L in View Park-Windsor Hills to 189 in Hawthorne.
What 195 mg/L means at home
Scale forms fast here. Kettles and coffee makers need regular descaling, and showerheads clog unless you clean them.
Tank water heaters collect mineral sediment that insulates the water from the burner, so flushing the tank matters more than usual.
Dishes and glass shower doors spot easily. Soap scum and a dull film on hair or laundry are common complaints.
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 195 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 × 11.4 gpg = 2,560 grains a day. A 24,000-grain unit regenerates about every 9 days.
EPA record for Inglewood's water system
No health-based violations since 2016
Serves about 81,191 people from surface water.
- Health-based
- 0
- Monitoring or reporting
- 1
- Open now
- 0
EPA lists Inglewood- City, Water Dept. as the system serving Inglewood. The hardness figure above comes from a different system's report, which TapWaterData uses for Inglewood.
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 Inglewood water hard?
Yes. It measures about 195 mg/L (11.4 grains per gallon), which the USGS classes as very hard.
What is the water hardness in Inglewood in grains per gallon?
About 11.4 gpg. One grain per gallon equals 17.1 mg/L, so 195 mg/L divided by 17.1 gives 11.4.
What size water softener do I need in Inglewood?
For 3 people using 75 gallons each per day, 11.4 gpg works out to about 2,560 grains a day. A 24,000-grain softener covers that with a regeneration about every 9 days.
Has the Inglewood water system had EPA violations?
EPA records show no health-based violations for Inglewood- City, Water Dept. since 2016. There were also 1 monitoring or reporting violation, which are about late or missing tests and notices.
Nearby cities
- Lennox185 mg/LVery hard
- Westmont185 mg/LVery hard
- View Park-Windsor Hills122 mg/LHard
- Hawthorne189 mg/LVery hard
- Del Aire185 mg/LVery hard
- Ladera Heights122 mg/LHard
- West Athens185 mg/LVery hard
- Culver City122 mg/LHard
- Alondra Park185 mg/LVery hard
- Lawndale188 mg/LVery hard
Hardness data: TapWaterData US Water Hardness (utility report, September 2, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.