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Water Hardness in Waterford, CA

California · 1 zip codes · 9 matched water systems

220 PPM
12.9 GPG
Hard
0Soft60120180300+
High Confidence — USGS Monitoring

Dataset updated March 9, 20269 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

Source context

How this city reading is built

This city reading is a weighted rollup across 9 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
7 USGS-backed sources
9 matched systems total for this city; USGS monitoring is used where treated-water reports are unavailable.
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
March 9, 2026
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 Waterford

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

9 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.
Modesto, City Of
CA5010010
Soft
27 PPMsurface water218,771 servedHigh Confidence — USGS Monitoring
Turlock, City Of
CA5010019
Very Hard
417 PPMsurface water72,682 servedHigh Confidence — USGS Monitoring
Ceres, City Of
CA5010028
Very Hard
417 PPMsurface water54,513 servedHigh Confidence — USGS Monitoring
Riverbank, City Of
CA5010018
Hard
223 PPMgroundwater24,834 servedHigh Confidence — USGS Monitoring
Patterson, City Of
CA5010017
Very Hard
779 PPMgroundwater23,304 servedEstimated — Nearby Data
Showing the first 5 systems. Expand to review all matched systems.

Zip Codes in Waterford, CA

What This Means For You

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

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

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Frequently Asked Questions

How hard is the water in Waterford, CA?

The citywide weighted average water hardness in Waterford, CA is 220 PPM (12.9 GPG), classified as hard. This is based on 9 matched water systems.

Do I need a water softener in Waterford, CA?

With a citywide average hardness of 220 PPM, a water softener is recommended for homes in Waterford. Confirm your tap reading before sizing equipment.

Is hard water in Waterford, 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 Waterford, CA?

Waterford, California is served by 9 matched water systems across 1 zip code.

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