How hard is the water in Parkway, CA?

Tap water hardness
66mg/L
3.9gpg
Moderately hard

Reported by Cal Am - Parkway · December 2024

CA typical
121 mg/L
EPA health violations since 2016
0
Softener for 3 people
24k grain
Data
Utility report

Parkway water measures 66 mg/L (3.9 gpg) of hardness, moderately hard by USGS standards. The number comes from Cal Am - Parkway, dated December 2024.

Parkway on the hardness scale, with nearby cities
060120180240300360+CA typical 121Lemon Hill: 25 mg/LLemon Hill 25Fruitridge Pocket: 25 mg/LFruitridge Pocket 25West Sacramento: 35 mg/LWest Sacramento 35Rosemont: 38 mg/LRosemont 38Sacramento: 45 mg/LSacramento 45Elk Grove: 50 mg/LElk Grove 50Vineyard: 53 mg/LVineyard 53Florin: 66 mg/LFlorin 66La Riviera: 85 mg/LLa Riviera 85Arden-Arcade: 98 mg/LArden-Arcade 98Parkway 66mg/L as calcium carbonate060120180240300360+CA 121Lemon Hill: 25 mg/LLemon Hill 25Fruitridge Pocket: 25 mg/LFruitridge. 25West Sacramento: 35 mg/LWest Sacra. 35Rosemont: 38 mg/LRosemont 38Sacramento: 45 mg/LSacramento 45Florin: 66 mg/LFlorin 6666 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Parkway sits 55 mg/L below the typical California figure of 121. Of the 10 nearest cities we track, 7 have softer water and 2 have harder. The range nearby runs from 25 mg/L in Lemon Hill to 98 in Arden-Arcade.

What 66 mg/L means at home

You may see faint white spots on glasses and shower doors after the water dries.

Scale builds up slowly. A kettle or coffee maker needs descaling now and then, maybe every few months.

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

Optional. Plenty of households at this level live with it and descale the kettle now and then.

Water softener

Worth a look if spots on glass bother you, or if your tankless water heater manual asks for softer water.

Carbon filter

Improves taste and removes chlorine. It leaves calcium and magnesium in place.

Softener size for Parkway

3 people × 75 gallons a day × 3.9 gpg = 871 grains a day. A 24,000-grain unit regenerates about every 27 days.

Size it for your household

EPA record for Parkway's water system

Cal Am - Parkway · PWSID CA3410017

No health-based violations since 2016

Serves about 50,646 people from surface water.

Health-based
0
Monitoring or reporting
0
Open now
0

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

Somewhat. It measures about 66 mg/L (3.9 grains per gallon), which the USGS classes as moderately hard.

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

About 3.9 gpg. One grain per gallon equals 17.1 mg/L, so 66 mg/L divided by 17.1 gives 3.9.

What size water softener do I need in Parkway?

For 3 people using 75 gallons each per day, 3.9 gpg works out to about 871 grains a day. A 24,000-grain softener covers that with a regeneration about every 27 days.

Has the Parkway water system had EPA violations?

EPA records show no health-based violations for Cal Am - Parkway since 2016.

Nearby cities

All 515 cities in California

Hardness data: TapWaterData US Water Hardness (utility report, December 8, 2024), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.