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City water profile

Pima water quality

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

Median indexed hardness

323PPM

One indexed ZIP

Range 323–323 PPM

State comparison
82 PPM above
State hardness rank
#18 of 133
Matched utilities
3
Active health records
1

City summary

What the indexed records say

Pima has 1 published ZIP profile across Graham County. The indexed median is 323 PPM, compared with 241 PPM across Arizona.

Among the 133 Arizonacities with an indexed median, Pima ranks #18from 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.

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
4.5 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Mar 29, 2016 to May 29, 2026.

ZIP directory

Water reports in Pima

Open a ZIP for site-level provenance and measurements.

ZIP code

85543

Very Hard

323 PPM

Nearest site
4.5 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Graham County Utilities - Pima

PWSID AZ0405002

Groundwater
System population served
3,799
Last reported
May 14, 2026

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

Graham County Utilities-Fort Thomas

PWSID AZ0405001

Groundwater
System population served
452
Last reported
May 14, 2026

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

Ash Creek Water Company

PWSID AZ0405007

Groundwater
System population served
310
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

1 unique active health-based record appears among associated systems. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
Lead and Copper RuleAZ0405001Dec 1, 2025Unaddressed · health-based
Consumer Confidence RuleAZ0405002Oct 2, 2025Resolved
Consumer Confidence RuleAZ0405001Oct 2, 2025Resolved
Consumer Confidence RuleAZ0405007Oct 2, 2025Resolved
Consumer Confidence RuleAZ0405002Jul 1, 2025Resolved
Consumer Confidence RuleAZ0405001Jul 1, 2025Resolved
Consumer Confidence RuleAZ0405007Jul 1, 2025Resolved
Groundwater RuleAZ0405002Feb 23, 2025Resolved · health-based
Consumer Confidence RuleAZ0405001Oct 2, 2023Resolved
Consumer Confidence RuleAZ0405007Oct 2, 2023Resolved

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 Pima

Is the water hard?

The indexed city median is 323 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.