Granite Bay, CA water hardness

Tap water hardness
13mg/L
0.8gpg
Soft

Reported by Placer Cwa - Foothill · August 2025

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

Tap water in Granite Bay has about 13 mg/L of hardness, which is 0.8 grains per gallon. On the USGS scale that counts as soft. The number comes from Placer Cwa - Foothill, dated August 2025.

Granite Bay on the hardness scale, with nearby cities
060120180240300360+CA typical 121Loomis: 11 mg/LLoomis 11Rocklin: 11 mg/LRocklin 11El Dorado Hills: 14 mg/LEl Dorado Hills 14Lincoln: 15 mg/LLincoln 15Folsom: 18 mg/LFolsom 18Roseville: 19 mg/LRoseville 19Gold River: 30 mg/LGold River 30Orangevale: 45 mg/LOrangevale 45Fair Oaks: 53 mg/LFair Oaks 53Citrus Heights: 82 mg/LCitrus Heights 82Granite Bay 13mg/L as calcium carbonate060120180240300360+CA 121Loomis: 11 mg/LLoomis 11Rocklin: 11 mg/LRocklin 11Folsom: 18 mg/LFolsom 18Roseville: 19 mg/LRoseville 19Orangevale: 45 mg/LOrangevale 45Citrus Heights: 82 mg/LCitrus Hei. 8213 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 13 mg/L, Granite Bay is 108 mg/L below the typical California figure of 121. Of the 10 nearest cities we track, 2 have softer water and 8 have harder. The range nearby runs from 11 mg/L in Loomis to 82 in Citrus Heights.

What 13 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 13 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 Granite Bay's water system

Placer Cwa - Foothill · PWSID CA3110025

No health-based violations since 2016

Serves about 93,417 people from surface water.

Health-based
0
Monitoring or reporting
0
Open now
0

TapWaterData ties Granite Bay to this system. EPA's service-area records do not name Granite Bay, 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 Granite Bay water hard?

No. It measures about 13 mg/L (0.8 grains per gallon), which the USGS classes as soft.

What is the water hardness in Granite Bay in grains per gallon?

About 0.8 gpg. One grain per gallon equals 17.1 mg/L, so 13 mg/L divided by 17.1 gives 0.8.

Has the Granite Bay water system had EPA violations?

EPA records show no health-based violations for Placer Cwa - Foothill since 2016.

Nearby cities

All 515 cities in California

Hardness data: TapWaterData US Water Hardness (utility report, August 4, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.