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City water profile

Rillito water quality

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

Median indexed hardness

210PPM

One indexed ZIP

Range 209.5–209.5 PPM

State comparison
31 PPM below
State hardness rank
#114 of 133
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Rillito has 1 published ZIP profile across Pima County. The indexed median is 210 PPM, compared with 241 PPM across Arizona.

Among the 133 Arizonacities with an indexed median, Rillito ranks #114from 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
6.3 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Jan 11, 2016 to Aug 16, 2016.

ZIP directory

Water reports in Rillito

Open a ZIP for site-level provenance and measurements.

ZIP code

85654

Very Hard

209.5 PPM

Nearest site
6.3 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Rillito Water Users Assoc

PWSID AZ0410098

Groundwater
System population served
165
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 RULE REVISIONSAZ0410098Jul 2, 2025Unaddressed
Public NoticeAZ0410098Dec 20, 2024Resolved
LEAD AND COPPER RULE REVISIONSAZ0410098Oct 17, 2024Resolved
LEAD AND COPPER RULE REVISIONSAZ0410098Oct 17, 2024Resolved · health-based
ChlorineAZ0410098Oct 1, 2023Resolved
ChlorineAZ0410098Apr 1, 2023Resolved
Consumer Confidence RuleAZ0410098Oct 2, 2022Resolved
ChlorineAZ0410098Jul 1, 2022Resolved
ChlorineAZ0410098Jan 1, 2022Resolved
ChlorineAZ0410098Oct 1, 2021Resolved

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 Rillito

Is the water hard?

The indexed city median is 210 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.