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City water profile

Terre Haute water quality

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

Median indexed hardness

337PPM

5 indexed ZIPs

Range 336–337 PPM

State comparison
24 PPM above
State hardness rank
#136 of 386
Matched utilities
7
Active health records
1

City summary

What the indexed records say

Terre Haute has 5 published ZIP profiles across Vigo County. The indexed median is 337 PPM, compared with 313 PPM across Indiana.

Among the 386 Indianacities with an indexed median, Terre Haute ranks #136from highest to lowest. Across all 472 state ZIP profiles, available estimates run from 132to 371 PPM.

The 336–337 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 hard5 ZIPs

5 of 5 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
31.7 miles
Profiles with evidence
5/5

Confidence labels

High: 0Moderate: 0Low: 5

Observation window: Mar 30, 2016 to Sep 2, 2025.

ZIP directory

Water reports in Terre Haute

Open a ZIP for site-level provenance and measurements.

ZIP code

47802

Very Hard

336 PPM

Nearest site
37.9 mi
Confidence
Low

View full ZIP evidence →

ZIP code

47803

Very Hard

336 PPM

Nearest site
28.2 mi
Confidence
Low

View full ZIP evidence →

ZIP code

47804

Very Hard

337 PPM

Nearest site
30.1 mi
Confidence
Low

View full ZIP evidence →

ZIP code

47807

Very Hard

337 PPM

Nearest site
31.7 mi
Confidence
Low

View full ZIP evidence →

ZIP code

47809

Very Hard

337 PPM

Nearest site
32.1 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Indiana American Water - Terre Haute

PWSID IN5284012

Groundwater
System population served
67,765
Last reported
Jun 30, 2026

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

Indiana American Water - Sullivan

PWSID IN5277009

Groundwater
System population served
6,598
Last reported
Jun 30, 2026

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

Fci & Fpc - Terre Haute

PWSID IN5284018

Groundwater
System population served
1,390
Last reported
Jun 30, 2026

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

Trails Edge Apts

PWSID IN5284022

Groundwater
System population served
260
Last reported
Jun 30, 2026

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

Morris Mobile Home Estates

PWSID IN5284029

Groundwater
System population served
75
Last reported
Jun 30, 2026

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

Rocky Acres Mobile Home Park

PWSID IN5284027

Groundwater
System population served
50
Last reported
Jun 30, 2026

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

Leisure Acres Mobile Home Park

PWSID IN5284019

Groundwater
System population served
49
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

1 unique active health-based record appears among associated systems. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
Public NoticeIN5284022Dec 2, 2025Unaddressed
Consumer Confidence RuleIN5284027Oct 1, 2025Unaddressed
Gross Alpha, Excl. Radon and UIN5284019Oct 1, 2025Archived
Radium-228IN5284019Oct 1, 2025Archived
Consumer Confidence RuleIN5284019Oct 1, 2025Unaddressed
Radium-226IN5284019Oct 1, 2025Archived
Consumer Confidence RuleIN5284018Jul 1, 2025Resolved
Consumer Confidence RuleIN5284027Jul 1, 2025Unaddressed
Consumer Confidence RuleIN5284019Jul 1, 2025Unaddressed
Public NoticeIN5284022Jan 1, 2025Unaddressed

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 Terre Haute

Is the water hard?

The indexed city median is 337 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.