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City water profile

Iona water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Iona, Idaho.

Median indexed hardness

186PPM

One indexed ZIP

Range 186–186 PPM

State comparison
18 PPM above
State hardness rank
#27 of 67
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Iona has 1 published ZIP profile across Bonneville County. The indexed median is 186 PPM, compared with 168 PPM across Idaho.

Among the 67 Idahocities with an indexed median, Iona ranks #27from highest to lowest. Across all 78 state ZIP profiles, available estimates run from 22.2to 339 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
43.4 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Apr 11, 2016 to Jun 18, 2026.

ZIP directory

Water reports in Iona

Open a ZIP for site-level provenance and measurements.

ZIP code

83427

Very Hard

186 PPM

Nearest site
43.4 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Iona Water Dept

PWSID ID7100041

Groundwater
System population served
2,717
Last reported
Jun 26, 2026

A municipal system, in-state city, and served county all agree with this Census 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.

No violation records are included in the current lookback window.

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 Iona

Is the water hard?

The indexed city median is 186 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.