Water Hardness in 93001
San Buenaventura, California · Ventura County
Dataset updated March 9, 2026Matched to 25 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 25 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 93001
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 |
|---|---|---|---|
Oxnard Water Dept CA5610007 | surface water | 403 PPM Very HardUSGS estimate: 601 PPM | |
Ventura Water Department CA5610017 | surface water | 601 PPM Very Hard | |
Ventura Wwd No. 8 - Simi Valley CA5610023 | surface water | 193 PPM HardUSGS estimate: 790 PPM | |
Cal American Water Co CA5610040 | surface water | 254 PPM Very Hard | |
City Of Thousand Oaks Water Department CA5610020 | surface water | 790 PPM Very Hard |
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.
Very Hard Water - Treatment Strongly Recommended
Your water is very hard. Without treatment, you can expect significant scale buildup in pipes and appliances, higher energy bills from reduced water heater efficiency, and persistent issues with skin and hair dryness.
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 San Buenaventura, CA (93001).
Frequently Asked Questions
Is the water hard in San Buenaventura, CA (93001)?
The average water hardness in 93001 is 417 PPM (24.4 GPG), which is classified as very hard.
Do I need a water softener in 93001?
With hardness of 417 PPM, a water softener is recommended for homes in 93001.
Is hard water in 93001 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 93001?
Zip code 93001 in San Buenaventura, California is served by 25 water systems.
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