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Water Hardness in 85259

Scottsdale, Arizona · Maricopa County

250 PPM
14.6 GPG
Very Hard
0Soft60120180300+
Verified — Annual Water Quality Report

Dataset updated March 9, 2026Matched to 25 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

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.

Source basis
25 verified treated-water sources
25 matched systems total for this ZIP; treated-water reports are prioritized when available.
Water source profile
Primarily surface water
Surface-water hardness can shift with reservoirs, runoff, season, and treatment. This profile is weighted by known population served across matched systems.
Data recency
March 9, 2026
Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

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 85259

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.

25 water systems
PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.
Phoenix City Of
AZ0407025
Very Hard
250 PPMsurface water1,695,000 servedVerified — Annual Water Quality Report
Source water: 65 PPM
Mesa City Of
AZ0407095
Very Hard
250 PPMsurface water466,000 servedVerified — Annual Water Quality Report
Source water: 209 PPM
Gilbert, Town Of
AZ0407092
Very Hard
250 PPMsurface water247,600 servedVerified — Annual Water Quality Report
Source water: 185 PPM
Chandler City Of
AZ0407090
Very Hard
250 PPMsurface water247,328 servedVerified — Annual Water Quality Report
Source water: 209 PPM
Scottsdale City Of
AZ0407098
Very Hard
250 PPMsurface water241,361 servedVerified — Annual Water Quality Report
Source water: 215 PPM
Showing the first 5 systems. Expand to review all matched systems.

Nearby Zip Codes

852682508526025085255250852582508525025085256250852542508525325085054250852512508503225085203250

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

Salt-Based Water Softener
Our PickAFWFilters Fleck 5600SXT 48KAlso GreatWhirlpool WHES40E 40KAlso GreatAFWFilters 64K GrainAlso GreatAFWFilters Iron Pro 2 64KAlso GreatSpringWell Filter + Softener Combo
Water Hardness Test Kit
Our PickVarify (150 Strips)Also GreatJNW Direct (150 Strips)
Whole-House Water Filter
Our PickiSpring WGB32B 3-Stage
Water Softener Salt
Our PickMorton Clean & ProtectAlso GreatDiamond Crystal Bright & Soft
Shower Head Filter
Our PickWeddell DuoAlso GreatAquaBliss SF100Also GreatSprite Pure 7-SettingAlso GreatAqua Earth 20-Stage

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 Scottsdale, AZ (85259).

Submit Your Data

Frequently Asked Questions

Is the water hard in Scottsdale, AZ (85259)?

The average water hardness in 85259 is 250 PPM (14.6 GPG), which is classified as very hard.

Do I need a water softener in 85259?

With hardness of 250 PPM, a water softener is recommended for homes in 85259.

Is hard water in 85259 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 85259?

Zip code 85259 in Scottsdale, Arizona is served by 25 water systems.

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