Skip to content

City water profile

Casa Grande water quality

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

Median indexed hardness

288PPM

3 indexed ZIPs

Range 246–288 PPM

State comparison
47 PPM above
State hardness rank
#28 of 133
Matched utilities
8
Active health records
0

City summary

What the indexed records say

Casa Grande has 3 published ZIP profiles across Pinal County. The indexed median is 288 PPM, compared with 241 PPM across Arizona.

Among the 133 Arizonacities with an indexed median, Casa Grande ranks #28from highest to lowest. Across all 285 state ZIP profiles, available estimates run from 66.4to 1250 PPM.

The 246–288 PPM range shows how much the available ZIP estimates vary within the city label. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard3 ZIPs

3 of 3 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
41.5 miles
Profiles with evidence
3/3

Confidence labels

High: 0Moderate: 0Low: 3

Observation window: Jan 11, 2016 to Dec 18, 2024.

ZIP directory

Water reports in Casa Grande

Open a ZIP for site-level provenance and measurements.

ZIP code

85122

Very Hard

246 PPM

Nearest site
38 mi
Confidence
Low

View full ZIP evidence →

ZIP code

85193

Very Hard

288 PPM

Nearest site
41.5 mi
Confidence
Low

View full ZIP evidence →

ZIP code

85194

Very Hard

288 PPM

Nearest site
43.3 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Arizona Water Co - Pinal Valley

PWSID AZ0411009

Groundwater
System population served
134,432
Last reported
May 14, 2026

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

Picacho Water Company

PWSID AZ0411135

Groundwater
System population served
2,440
Last reported
May 14, 2026

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

Arizona Water Co - Tierra Grande

PWSID AZ0411076

Groundwater
System population served
1,796
Last reported
May 14, 2026

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

Awc - Casa Grande West Water Company

PWSID AZ0411024

Groundwater
System population served
943
Last reported
May 14, 2026

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

Arizona Water Co - Stanfield

PWSID AZ0411012

Groundwater
System population served
639
Last reported
May 14, 2026

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

Sierra Vista Rv Park

PWSID AZ0411383

Groundwater
System population served
200
Last reported
May 14, 2026

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

Awc - Casa Grande South Water Company

PWSID AZ0411061

Groundwater
System population served
176
Last reported
May 14, 2026

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

Gw Santa Cruz Water - Cp Water Co

PWSID AZ0411151

Groundwater
System population served
37
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.

RecordSystemPeriodStatus
Lead and Copper RuleAZ0411135Jan 1, 2026Unaddressed
Public NoticeAZ0411135Nov 19, 2025Resolved
Lead and Copper RuleAZ0411135Oct 1, 2025Unaddressed
E. COLIAZ0411009Aug 20, 2025Resolved
ArsenicAZ0411009Apr 1, 2025Resolved
LEAD AND COPPER RULE REVISIONSAZ0411076Oct 17, 2024Resolved
LEAD AND COPPER RULE REVISIONSAZ0411076Oct 17, 2024Resolved · health-based
LEAD AND COPPER RULE REVISIONSAZ0411012Oct 17, 2024Resolved · health-based
LEAD AND COPPER RULE REVISIONSAZ0411012Oct 17, 2024Resolved
LEAD AND COPPER RULE REVISIONSAZ0411061Oct 17, 2024Resolved

Practical next steps

Move from index to evidence

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

Questions people ask

About water in Casa Grande

Is the water hard?

The indexed city median is 288 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.