Roseville, CA water hardness

Tap water hardness
19mg/L
1.1gpg
SoftReports range 19–72

Reported by City of Roseville · October 2025

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

The water in Roseville carries roughly 19 mg/L of dissolved calcium and magnesium, or 1.1 grains per gallon. That is soft water. The number comes from City of Roseville, dated October 2025. Reports for this system disagree, with values from 19 to 72 mg/L.

Roseville on the hardness scale, with nearby cities
060120180240300360+CA typical 121Rocklin: 11 mg/LRocklin 11Loomis: 11 mg/LLoomis 11Granite Bay: 13 mg/LGranite Bay 13Lincoln: 15 mg/LLincoln 15Orangevale: 45 mg/LOrangevale 45Citrus Heights: 82 mg/LCitrus Heights 82Antelope: 90 mg/LAntelope 90Foothill Farms: 92 mg/LFoothill Farms 92Rio Linda: 93 mg/LRio Linda 93North Highlands: 98 mg/LNorth Highlands 98Roseville 19mg/L as calcium carbonate060120180240300360+CA 121Rocklin: 11 mg/LRocklin 11Loomis: 11 mg/LLoomis 11Lincoln: 15 mg/LLincoln 15Citrus Heights: 82 mg/LCitrus Hei. 82Antelope: 90 mg/LAntelope 90Foothill Farms: 92 mg/LFoothill F. 9219 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Roseville sits 102 mg/L below the typical California figure of 121. Of the 10 nearest cities we track, 4 have softer water and 6 have harder. The range nearby runs from 11 mg/L in Rocklin to 98 in North Highlands.

What 19 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 19 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 Roseville's water system

City of Roseville · PWSID CA3110008

No health-based violations since 2016

Serves about 165,736 people from surface water.

Health-based
0
Monitoring or reporting
1
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 Roseville water hard?

No. It measures about 19 mg/L (1.1 grains per gallon), which the USGS classes as soft.

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

About 1.1 gpg. One grain per gallon equals 17.1 mg/L, so 19 mg/L divided by 17.1 gives 1.1.

Has the Roseville water system had EPA violations?

EPA records show no health-based violations for City of Roseville since 2016. There were also 1 monitoring or reporting violation, which are about late or missing tests and notices.

Nearby cities

All 515 cities in California

Hardness data: TapWaterData US Water Hardness (utility report, October 13, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.