Water Hardness in Kelseyville, CA
California · 1 zip codes · 7 matched water systems
City avg (weighted): 197 PPM
Dataset updated March 9, 20267 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology
How this city reading is built
This city reading is a weighted rollup across 7 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.
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 Kelseyville
These systems are matched to Kelseyville, CA. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.
| Water System | Source | Hardness | Pop. Served |
|---|---|---|---|
Hidden Valley Lake Csd CA1710015 | groundwater | 235 PPM Hard | |
Mt. Konocti Mutual Water Company CA1710014 | surface water | 157 PPM Moderately HardUSGS estimate: 125 PPM | |
Buckingham Park Water District CA1710011 | surface water | 148 PPM Moderately HardUSGS estimate: 125 PPM | |
Harbor View Mutual Water Company CA1700568 | surface water | 125 PPM Moderately Hard | |
Clear Water Mutual Water Company CA1700546 | surface water | 140 PPM Moderately HardUSGS estimate: 125 PPM |
Zip Codes in Kelseyville, CA
What This Means For You
Recommendations are based on the displayed 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 Kelseyville, CA.
Frequently Asked Questions
How hard is the water in Kelseyville, CA?
The citywide weighted average water hardness in Kelseyville, CA is 197 PPM (11.5 GPG), classified as hard. This is based on 7 matched water systems. The gauge highlights Mt. Konocti Mutual Water Company, a verified treated-water system, because individual systems can differ from the citywide average.
Do I need a water softener in Kelseyville, CA?
With a citywide average hardness of 197 PPM, a water softener is recommended for homes in Kelseyville. Confirm your tap reading before sizing equipment.
Is hard water in Kelseyville, 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 Kelseyville, CA?
Kelseyville, California is served by 7 matched water systems across 1 zip code.
Learn More About Your Water
Do You Need a Water Softener? (Based on Your Water Hardness)
A data-driven guide to help you decide if a water softener is worth the investment based on your actual water hardness level.
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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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