Water Hardness in 85646
Tubac, Arizona · Santa Cruz County
Dataset updated March 9, 2026Matched to 6 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 6 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 85646
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 |
|---|---|---|---|
| Nogales City Of AZ0412004 | groundwater | 148 PPM Moderately Hard | |
| Liberty Water Rio Rico AZ0412011 | groundwater | 165 PPM Moderately Hard | |
| Epcor - Tubac AZ0412001 | groundwater | 291 PPM Very Hard | |
| Baca Float Water Company AZ0412037 | groundwater | 291 PPM Very Hard | |
| Avalon Gardens Water System AZ0412044 | groundwater | 148 PPM Moderately Hard |
Nearby Zip Codes
What This Means For You
Use this ZIP reading as a local planning estimate, not a final treatment specification. Hardness can vary by utility zone, seasonal blend, private well, and building plumbing. Confirm your tap reading with a utility report or home hardness test before sizing equipment.
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 Tubac, AZ (85646).
Frequently Asked Questions
Is the water hard in Tubac, AZ (85646)?
The average water hardness in 85646 is 166 PPM (9.7 GPG), which is classified as moderately hard.
Do I need a water softener in 85646?
With hardness of 166 PPM, a water softener is worth considering for homes in 85646.
Is hard water in 85646 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 85646?
Zip code 85646 in Tubac, Arizona is served by 6 water systems.
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