Skip to content

City water profile

Maricopa water quality

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

Median indexed hardness

243PPM

One indexed ZIP

Range 243–243 PPM

State comparison
2 PPM above
State hardness rank
#84 of 133
Matched utilities
10
Active health records
0

City summary

What the indexed records say

Maricopa has 1 published ZIP profile across Pinal County. The indexed median is 243 PPM, compared with 241 PPM across Arizona.

Among the 133 Arizonacities with an indexed median, Maricopa ranks #84from highest to lowest. Across all 285 state ZIP profiles, available estimates run from 66.4to 1250 PPM.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community. 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 hard1 ZIP

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
25.1 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 0Low: 1

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

ZIP directory

Water reports in Maricopa

Open a ZIP for site-level provenance and measurements.

ZIP code

85138

Very Hard

243 PPM

Nearest site
25.1 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Gw Santa Cruz Water Co

PWSID AZ0411131

Groundwater
System population served
84,000
Last reported
May 14, 2026

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

Thunderbird Farms Dwid

PWSID AZ0411100

Groundwater
System population served
2,231
Last reported
May 14, 2026

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

Gw Santa Cruz Water - Maricopa Sw

PWSID AZ0411575

Groundwater
System population served
1,170
Last reported
May 14, 2026

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

Copper Mountain Ranch Cfd

PWSID AZ0411328

Groundwater
System population served
1,071
Last reported
May 14, 2026

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

Maricopa Consolidated Dwid

PWSID AZ0411036

Groundwater
System population served
928
Last reported
May 14, 2026

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

Papago Butte Dwid

PWSID AZ0411097

Groundwater
System population served
530
Last reported
May 14, 2026

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

Valle Escondido

PWSID AZ0411409

Groundwater
System population served
405
Last reported
May 14, 2026

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

New Saddleback Vista

PWSID AZ0411557

Groundwater
System population served
100
Last reported
May 14, 2026

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

American Realty Mortgage Company

PWSID AZ0411301

Groundwater
System population served
60
Last reported
May 14, 2026

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

Gw Santa Cruz Water -Twin Hawks Water

PWSID AZ0411460

Groundwater
System population served
57
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 RuleAZ0411328Jan 1, 2026Resolved
ChlorineAZ0411036Jan 1, 2026Archived
NitrateAZ0411097Jan 1, 2026Archived · health-based
NitrateAZ0411557Jan 1, 2026Archived · health-based
Revised Total Coliform RuleAZ0411131Nov 1, 2025Resolved
ChlorineAZ0411131Nov 1, 2025Archived
NitrateAZ0411097Oct 1, 2025Archived · health-based
Revised Total Coliform RuleAZ0411131Aug 1, 2025Resolved · health-based
Public NoticeAZ0411131Jul 19, 2025Resolved
Public NoticeAZ0411131Jul 19, 2025Resolved

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 Maricopa

Is the water hard?

The indexed city median is 243 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.