Water Hardness in Loomis, CA

Q: Do I need a water softener in Loomis, CA?

At a citywide weighted average of 44 PPM, Loomis has relatively soft water. A water softener is generally not necessary.

Q: How many water systems serve Loomis, CA?

Loomis, California has 10 matched water systems across 1 zip code.

California · 1 zip codes · 10 matched water systems

23 PPM

1.3 GPG

Soft

0Soft60120180300+

Verified — State Lab Tested

City avg (weighted): 44 PPM

Dataset updated March 9, 202610 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

System used for this reading

City Of Roseville

CA3110008

Water source: surface water

Source year: 2024

Serves: 155,612

USGS environmental estimate: 105 PPM

Source context

How this city reading is built

This city reading is a weighted rollup across 10 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis

6 verified treated-water sources

10 matched systems total for this city; treated-water reports are prioritized when available.

Water source profile

Primarily surface water

Surface-water hardness can shift with reservoirs, runoff, season, and treatment. This profile is weighted by known population served across matched systems.

Data recency

Report years 2024

Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.

Water Systems in Loomis

These systems are matched to Loomis, CA. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.

10 water systems

PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.

Water System	Source	Hardness	Pop. Served	Data Source
City Of Roseville CA3110008	surface water	23 PPM Soft USGS estimate: 105 PPM	155,612	Verified — State Lab Tested(2024)
Placer Cwa - Foothill CA3110025	surface water	19 PPM Soft USGS estimate: 70 PPM	89,544	Verified — State Lab Tested(2024)
City Of Lincoln CA3110004	surface water	153 PPM Moderately Hard	54,538	High Confidence — USGS Monitoring
Placer Cwa - Auburn/Bowman CA3110005	surface water	22 PPM Soft USGS estimate: 70 PPM	27,294	Verified — State Lab Tested(2024)
Northstar C.S.D. CA3110028	surface water	66 PPM Slightly Hard	15,452	High Confidence — USGS Monitoring

City Of Roseville

CA3110008

Soft

23 PPMsurface water155,612 servedVerified — State Lab Tested

Source water: 105 PPM

Placer Cwa - Foothill

CA3110025

Soft

19 PPMsurface water89,544 servedVerified — State Lab Tested

Source water: 70 PPM

City Of Lincoln

CA3110004

Moderately Hard

153 PPMsurface water54,538 servedHigh Confidence — USGS Monitoring

Placer Cwa - Auburn/Bowman

CA3110005

Soft

22 PPMsurface water27,294 servedVerified — State Lab Tested

Source water: 70 PPM

Northstar C.S.D.

CA3110028

Slightly Hard

66 PPMsurface water15,452 servedHigh Confidence — USGS Monitoring

Showing the first 5 systems. Expand to review all matched systems.

Zip Codes in Loomis, CA

9565044

What This Means For You

Recommendations are based on the displayed hardness reading. Confirm your tap reading before sizing or buying treatment equipment.

Your Water Is Soft

Your water hardness is in the soft range. You likely don't need a water softener. Enjoy your naturally soft water!

Know your water hardness?

If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Loomis, CA.

Submit Your Data

Frequently Asked Questions

How hard is the water in Loomis, CA?

The citywide weighted average water hardness in Loomis, CA is 44 PPM (2.6 GPG), classified as soft. This is based on 10 matched water systems. The gauge highlights City Of Roseville, a verified treated-water system, because individual systems can differ from the citywide average.

Do I need a water softener in Loomis, CA?

At 44 PPM, the citywide average is relatively soft. A water softener is generally not necessary.

Is hard water in Loomis, CA safe to drink?

Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.

How many water systems serve Loomis, CA?

Loomis, California is served by 10 matched water systems across 1 zip code.

Learn More About Your Water

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