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City water profile

Ketchum water quality

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

Median indexed hardness

173PPM

One indexed ZIP

Range 173–173 PPM

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

City summary

What the indexed records say

Ketchum has 1 published ZIP profile across Blaine County. The indexed median is 173 PPM, compared with 168 PPM across Idaho.

Among the 67 Idahocities with an indexed median, Ketchum ranks #32from 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
Hard1 ZIP
Very hard0 ZIPs

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
61.4 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Oct 25, 2016 to Aug 12, 2020.

ZIP directory

Water reports in Ketchum

Open a ZIP for site-level provenance and measurements.

ZIP code

83340

Hard

173 PPM

Nearest site
61.4 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Ketchum City Of

PWSID ID5070028

Groundwater
System population served
3,555
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.

RecordSystemPeriodStatus
Revised Total Coliform RuleID5070028Oct 1, 2025Archived
ChlorineID5070028Oct 1, 2025Archived
Total Haloacetic Acids (HAA5)ID5070028Jan 1, 2023Archived

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 Ketchum

Is the water hard?

The indexed city median is 173 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.