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City water profile

Idaho Falls water quality

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

Median indexed hardness

189PPM

3 indexed ZIPs

Range 181–189 PPM

State comparison
21 PPM above
State hardness rank
#25 of 67
Matched utilities
5
Active health records
0

City summary

What the indexed records say

Idaho Falls has 3 published ZIP profiles across Bonneville County. The indexed median is 189 PPM, compared with 168 PPM across Idaho.

Among the 67 Idahocities with an indexed median, Idaho Falls ranks #25from highest to lowest. Across all 78 state ZIP profiles, available estimates run from 22.2to 339 PPM.

The 181–189 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
31.1 miles
Profiles with evidence
3/3

Confidence labels

High: 0Moderate: 1Low: 2

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

ZIP directory

Water reports in Idaho Falls

Open a ZIP for site-level provenance and measurements.

ZIP code

83401

Very Hard

181 PPM

Nearest site
34.5 mi
Confidence
Low

View full ZIP evidence →

ZIP code

83402

Very Hard

189 PPM

Nearest site
20.7 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

83404

Very Hard

189 PPM

Nearest site
31.1 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Idaho Falls City Of

PWSID ID7100039

Groundwater
System population served
69,450
Last reported
Jun 26, 2026

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

Nur Water Assn

PWSID ID7100061

Groundwater
System population served
60
Last reported
Jun 26, 2026

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

Rancho Via Well Users Assn Inc

PWSID ID7100149

Groundwater
System population served
40
Last reported
Jun 26, 2026

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

Dj Park Well

PWSID ID7100200

Groundwater
System population served
35
Last reported
Jun 26, 2026

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

Northside Estates Well

PWSID ID7100060

Groundwater
System population served
30
Last reported
Jun 26, 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 REVISIONSID7100060Jul 2, 2025Resolved
Revised Total Coliform RuleID7100061Jul 1, 2025Archived · health-based
Lead and Copper RuleID7100200Oct 1, 2024Unaddressed
Revised Total Coliform RuleID7100061Jun 1, 2024Archived · health-based
NitrateID7100061Jan 1, 2024Resolved
NitrateID7100061Jan 1, 2024Resolved
E. COLIID7100061Aug 1, 2023Resolved
Revised Total Coliform RuleID7100061Jul 1, 2023Resolved · health-based
E. COLIID7100061May 1, 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 Idaho Falls

Is the water hard?

The indexed city median is 189 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.