Is tap water safe in Glendale?

EPA SDWIS shows no active health-based violation in this profile's reporting window. That is not the same as proving every contaminant is absent, and federal data can lag state and utility records.

How hard is the water in Glendale, AZ?

Nearby USGS observations produce an estimate of 187.5 ppm (11 grains per gallon), classified as very hard. This is not a tap measurement.

Do I need a water softener in ZIP code 85301?

At 187.5 ppm, a correctly sized whole-house softener can reduce scale buildup and hard-water spotting. Treatment for hardness does not remove all health-related contaminants.

City water profile

Glendale water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Glendale, Arizona.

Median indexed hardness

188PPM

9 indexed ZIPs

Range 97–187.5 PPM

State comparison: 53 PPM below
State hardness rank: #117 of 133
Matched utilities: 3
Active health records: 0

City summary

What the indexed records say

Glendale has 9 published ZIP profiles across Maricopa County. The indexed median is 188 PPM, compared with 241 PPM across Arizona.

Among the 133 Arizonacities with an indexed median, Glendale ranks #117from highest to lowest. Across all 285 state ZIP profiles, available estimates run from 66.4to 1250 PPM.

The 97–187.5 PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs

Moderately hard4 ZIPs

Hard0 ZIPs

Very hard5 ZIPs

9 of 9 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: 2.3 miles
Profiles with evidence: 9/9

Confidence labels

High: 0Moderate: 9Low: 0

Glendale City Of

PWSID AZ0407093

Surface water

System population served: 234,766
Last reported: May 14, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Valley Utilities Water Company Glendale

PWSID AZ0407079

Groundwater

System population served: 5,940
Last reported: May 14, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Olive Avenue Hoa

PWSID AZ0407484

Groundwater

System population served: 25
Last reported: May 14, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Compliance history

What EPA records show

No active health-based violation appears among the associated systems in the represented EPA reporting quarter. This does not mean every contaminant was tested at every tap.

Record	System	Period	Status
Total Haloacetic Acids (HAA5)	AZ0407093	Jan 1, 2025	Resolved
CARBON, TOTAL	AZ0407093	Jan 1, 2025	Resolved
Surface Water Treatment Rule	AZ0407093	Aug 1, 2023	Resolved

Practical next steps

Move from index to evidence

1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
3. Test the tap when needed. Confirm health concerns or treatment sizing with the right method.

Continue comparing

Other Arizona communities

Aguila

Maricopa County

243 PPM median

Avondale

Maricopa County

97 PPM median

Buckeye

Maricopa County

243 PPM median

Carefree

Maricopa County

229 PPM median

Cave Creek

Maricopa County

230 PPM median

Chandler

Maricopa County

228 PPM median

Search all 133 Arizona cities →

Questions people ask

About water in Glendale

Is the water hard?

The indexed city median is 188 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.