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City water profile

Sandborn water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Sandborn, Indiana.

Median indexed hardness

350PPM

One indexed ZIP

Range 349.5–349.5 PPM

State comparison
37 PPM above
State hardness rank
#69 of 386
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Sandborn has 1 published ZIP profile across Knox County. The indexed median is 350 PPM, compared with 313 PPM across Indiana.

Among the 386 Indianacities with an indexed median, Sandborn ranks #69from highest to lowest. Across all 472 state ZIP profiles, available estimates run from 132to 371 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
26.2 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Aug 13, 2019 to Sep 2, 2025.

ZIP directory

Water reports in Sandborn

Open a ZIP for site-level provenance and measurements.

ZIP code

47578

Very Hard

349.5 PPM

Nearest site
26.2 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Sandborn Water Department

PWSID IN5242011

Groundwater
System population served
449
Last reported
Jun 30, 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
Public NoticeIN5242011Dec 2, 2025Unaddressed
Consumer Confidence RuleIN5242011Oct 1, 2025Unaddressed
LEAD AND COPPER RULE REVISIONSIN5242011Jul 2, 2025Unaddressed
Consumer Confidence RuleIN5242011Jul 1, 2025Unaddressed
Public NoticeIN5242011Jan 1, 2025Unaddressed
LEAD AND COPPER RULE REVISIONSIN5242011Oct 17, 2024Resolved
LEAD AND COPPER RULE REVISIONSIN5242011Oct 17, 2024Resolved · health-based
Gross Alpha, Excl. Radon and UIN5242011Jan 1, 2024Resolved
Radium-226IN5242011Jan 1, 2024Resolved
Radium-228IN5242011Jan 1, 2024Resolved

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 Sandborn

Is the water hard?

The indexed city median is 350 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.