Water Hardness in 94589
American Canyon, California · Solano County
Dataset updated March 9, 2026Matched to 12 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 12 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.
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 94589
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.
| Water System | Source | Hardness | Pop. Served |
|---|---|---|---|
City Of Vallejo CA4810007 | surface water | 160 PPM Moderately HardUSGS estimate: 81 PPM | |
City Of Fairfield CA4810003 | surface water | 185 PPM HardUSGS estimate: 244 PPM | |
City Of Vacaville CA4810008 | surface water | 150 PPM Moderately HardUSGS estimate: 244 PPM | |
Suisun-Solano Water Authority CA4810005 | surface water | 170 PPM Moderately HardUSGS estimate: 259 PPM | |
City Of Benicia CA4810001 | surface water | 70 PPM Slightly HardUSGS estimate: 422 PPM |
Nearby Zip Codes
What This Means For You
Recommendations are based on the displayed ZIP hardness reading. Confirm your tap reading before sizing or buying treatment equipment.
Moderately Hard Water
Your water is moderately hard. You're likely seeing scale buildup on fixtures, spotty dishes, and may notice dry skin or hair. A water softener or conditioner can help.
Recommended Products
Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | Size Calculator | How 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 American Canyon, CA (94589).
Frequently Asked Questions
Is the water hard in American Canyon, CA (94589)?
The average water hardness in 94589 is 165 PPM (9.7 GPG), which is classified as moderately hard.
Do I need a water softener in 94589?
With hardness of 165 PPM, a water softener is worth considering for homes in 94589.
Is hard water in 94589 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 94589?
Zip code 94589 in American Canyon, California is served by 12 water systems.
Learn More About Your Water
Do You Need a Water Softener? (Based on Your Water Hardness)
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Salt-based softeners remove hardness minerals. Salt-free conditioners prevent scale but don't soften. Here's how to choose based on your water hardness level.
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We tested KDF, Vitamin C, and carbon shower filters for hard water. Here are the filters that actually reduce mineral buildup on hair and skin.
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