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Water Hardness in 96103

Cromberg, California · Plumas County

39 PPM
2.3 GPG
Soft
0Soft60120180300+
Verified - State Lab Tested

Dataset updated March 9, 2026Matched to 4 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

How this ZIP reading is built

This ZIP reading is built from 4 matched water systems. When more than one system is matched, the displayed value is weighted toward larger known service populations when that data is available.

Source basis
2 verified treated-water sources
4 matched systems total for this ZIP; treated-water reports are prioritized when available.
Water source profile
Primarily groundwater
Groundwater commonly picks up calcium and magnesium after contact with rock and soil. This profile is weighted by known population served across matched systems.
Data recency
Report years 2023-2024
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 Serving 96103

These are the systems matched to this ZIP code. The displayed ZIP value is weighted toward larger known service populations when population data is available.

4 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.
Plumas Eureka Csd
CA3210011
Soft
19 PPMgroundwater1,534 servedVerified - State Lab Tested
Source water: 71 PPM
Feather River Rv & Mhp
CA3200148
Slightly Hard
71 PPMgroundwater741 servedHigh Confidence - USGS Monitoring
Graeagle Water Company
CA3210005
Soft
42 PPMsurface water737 servedVerified - State Lab Tested
Source water: 60 PPM
Blairsden Water Users Assn
CA3200134
Slightly Hard
71 PPMgroundwater200 servedHigh Confidence - USGS Monitoring

Nearby Zip Codes

9610647961226196125449612479959366295971419594444959832396126889598119495934239591021

What This Means For You

Use this ZIP reading as a local planning estimate, not a final treatment specification. Hardness can vary by utility zone, seasonal blend, private well, and building plumbing. Confirm your tap reading with a utility report or home hardness test before sizing equipment.

MethodologyData sourcesHow to test your 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 Cromberg, CA (96103).

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Frequently Asked Questions

Is the water hard in Cromberg, CA (96103)?

The average water hardness in 96103 is 39 PPM (2.3 GPG), which is classified as soft.

Do I need a water softener in 96103?

At 39 PPM, your water is relatively soft. A water softener is generally not necessary.

Is hard water in 96103 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 96103?

Zip code 96103 in Cromberg, California is served by 4 water systems.

Learn More About Your Water

Water Hardness Scale: PPM and GPG Chart

Use the USGS water hardness scale to compare PPM, GPG, and mg/L levels from soft to very hard water.

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How to Test Water Hardness at Home

Compare free lookups, soap tests, test strips, liquid drop kits, and lab tests for measuring water hardness.

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