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City water profile

West Lafayette water quality

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

Median indexed hardness

295PPM

2 indexed ZIPs

Range 290–300 PPM

State comparison
18 PPM below
State hardness rank
#275 of 386
Matched utilities
2
Active health records
0

City summary

What the indexed records say

West Lafayette has 2 published ZIP profiles across Tippecanoe County. The indexed median is 295 PPM, compared with 313 PPM across Indiana.

Among the 386 Indianacities with an indexed median, West Lafayette ranks #275from highest to lowest. Across all 472 state ZIP profiles, available estimates run from 132to 371 PPM.

The 290–300 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 hard2 ZIPs

2 of 2 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
39 miles
Profiles with evidence
2/2

Confidence labels

High: 0Moderate: 0Low: 2

Observation window: Mar 30, 2016 to May 13, 2026.

ZIP directory

Water reports in West Lafayette

Open a ZIP for site-level provenance and measurements.

ZIP code

47906

Very Hard

290 PPM

Nearest site
33.7 mi
Confidence
Low

View full ZIP evidence →

ZIP code

47907

Very Hard

300 PPM

Nearest site
39 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Purdue Univ. Water Works

PWSID IN5279015

Groundwater
System population served
50,000
Last reported
Jun 30, 2026

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

Indiana American Water - West Lafayette

PWSID IN5279020

Groundwater
System population served
35,533
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.

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 West Lafayette

Is the water hard?

The indexed city median is 295 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.