Arcadia, CA water hardness

Tap water hardness
54mg/L
3.2gpg
Soft

Reported by San Gabriel Valley Water CO.-El Monte · July 2025

CA typical
121 mg/L
EPA health violations since 2016
0
Data
Utility report

The water in Arcadia carries roughly 54 mg/L of dissolved calcium and magnesium, or 3.2 grains per gallon. That is soft water. The number comes from San Gabriel Valley Water CO.-El Monte, dated July 2025.

Arcadia on the hardness scale, with nearby cities
060120180240300360+CA typical 121El Monte: 48 mg/LEl Monte 48South Monrovia Island: 75 mg/LSouth Monrovia Island 75Temple City: 113 mg/LTemple City 113San Gabriel: 116 mg/LSan Gabriel 116San Marino: 116 mg/LSan Marino 116Mayflower Village: 135 mg/LMayflower Village 135Monrovia: 135 mg/LMonrovia 135Sierra Madre: 161 mg/LSierra Madre 161East Pasadena: 192 mg/LEast Pasadena 192East San Gabriel: 192 mg/LEast San Gabriel 192Arcadia 54mg/L as calcium carbonate060120180240300360+CA 121South Monrovia Island: 75 mg/LSouth Monr. 75Temple City: 113 mg/LTemple City 113Mayflower Village: 135 mg/LMayflower. 135Sierra Madre: 161 mg/LSierra Mad. 161East Pasadena: 192 mg/LEast Pasad. 192East San Gabriel: 192 mg/LEast San G. 19254 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 54 mg/L, Arcadia is 67 mg/L below the typical California figure of 121. Of the 10 nearest cities we track, 1 has softer water and 9 have harder. The range nearby runs from 48 mg/L in El Monte to 192 in East Pasadena.

What 54 mg/L means at home

Soap and shampoo lather with very little product. Kettles and showerheads stay mostly free of white crust.

Some people notice that soap feels slow to rinse off in soft water. That slippery feel is normal and harmless.

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

Nothing, as far as hardness goes. At 54 mg/L a softener would have almost nothing to remove.

Carbon filter

If the water tastes of chlorine, a pitcher or faucet carbon filter takes care of that. It does not change hardness.

EPA record for Arcadia's water system

City of Arcadia · PWSID CA1910003

No health-based violations since 2016

Serves about 54,236 people from groundwater.

Health-based
0
Monitoring or reporting
2
Open now
0

EPA lists City of Arcadia as the system serving Arcadia. The hardness figure above comes from a different system's report, which TapWaterData uses for Arcadia.

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 Arcadia water hard?

No. It measures about 54 mg/L (3.2 grains per gallon), which the USGS classes as soft.

What is the water hardness in Arcadia in grains per gallon?

About 3.2 gpg. One grain per gallon equals 17.1 mg/L, so 54 mg/L divided by 17.1 gives 3.2.

Has the Arcadia water system had EPA violations?

EPA records show no health-based violations for City of Arcadia since 2016. There were also 2 monitoring or reporting violations, which are about late or missing tests and notices.

Nearby cities

All 515 cities in California

Hardness data: TapWaterData US Water Hardness (utility report, July 1, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.