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Water Hardness in 95977

Smartville, California · Nevada County

40 PPM
2.3 GPG
Soft
0Soft60120180300+
Verified — State Lab Tested

Dataset updated March 9, 2026Matched to 3 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 3 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
3 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 2024-2025
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 95977

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.

3 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.
Truckee-Donner Pud, Main
CA2910003
Slightly Hard
66 PPMgroundwater36,730 servedHigh Confidence — USGS Monitoring
Nevada Id - E. George, Banner Mountain
CA2910004
Soft
8 PPMsurface water17,154 servedVerified — State Lab Tested
Source water: 27 PPM
Nevada Id - Loma Rica
CA2910006
Soft
10 PPMsurface water14,072 servedVerified — State Lab Tested
Source water: 27 PPM

Nearby Zip Codes

959464095903190959754095918194959493995962194956921959590119395681449593519495602449594534

What This Means For You

Recommendations are based on the displayed ZIP 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 Smartville, CA (95977).

Submit Your Data

Frequently Asked Questions

Is the water hard in Smartville, CA (95977)?

The average water hardness in 95977 is 40 PPM (2.3 GPG), which is classified as soft.

Do I need a water softener in 95977?

At 40 PPM, your water is relatively soft. A water softener is generally not necessary.

Is hard water in 95977 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 95977?

Zip code 95977 in Smartville, California is served by 3 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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