Water Hardness in 86004
Flagstaff, Arizona · Coconino County
Dataset updated March 9, 2026Matched to 10 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 10 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 86004
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 |
|---|---|---|---|
Flagstaff City Of AZ0403008 | surface water | 80 PPM Slightly HardUSGS estimate: 204 PPM | |
Grand Canyon National Park AZ0403702 | groundwater | 80 PPM Slightly HardUSGS estimate: 236 PPM | |
Arizona Water Co - Sedona AZ0403003 | groundwater | 80 PPM Slightly HardUSGS estimate: 326 PPM | |
Doney Park Water AZ0403005 | groundwater | 80 PPM Slightly HardUSGS estimate: 263 PPM | |
Kachina Village Dwid AZ0403013 | groundwater | 80 PPM Slightly HardUSGS estimate: 228 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.
Slightly Hard Water
Your water is slightly hard. You may notice minor spotting on dishes or a slight film on faucets. A water softener is optional but can improve water quality.
Recommended Products
Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | 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 Flagstaff, AZ (86004).
Frequently Asked Questions
Is the water hard in Flagstaff, AZ (86004)?
The average water hardness in 86004 is 80 PPM (4.7 GPG), which is classified as slightly hard.
Do I need a water softener in 86004?
At 80 PPM, your water is relatively soft. A water softener is generally not necessary.
Is hard water in 86004 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 86004?
Zip code 86004 in Flagstaff, Arizona is served by 10 water systems.
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