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City water profile

Carmel water quality

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

Median indexed hardness

312PPM

4 indexed ZIPs

Range 311.5–311.5 PPM

State comparison
1 PPM below
State hardness rank
#205 of 386
Matched utilities
3
Active health records
0

City summary

What the indexed records say

Carmel has 4 published ZIP profiles across Hamilton County. The indexed median is 312 PPM, compared with 313 PPM across Indiana.

Among the 386 Indianacities with an indexed median, Carmel ranks #205from highest to lowest. Across all 472 state ZIP profiles, available estimates run from 132to 371 PPM.

The 311.5–311.5 PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard4 ZIPs

4 of 4 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
12.1 miles
Profiles with evidence
4/4

Confidence labels

High: 0Moderate: 4Low: 0

Observation window: Jan 5, 2016 to May 28, 2026.

ZIP directory

Water reports in Carmel

Open a ZIP for site-level provenance and measurements.

ZIP code

46032

Very Hard

311.5 PPM

Nearest site
11.1 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

46033

Very Hard

311.5 PPM

Nearest site
15.7 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

46280

Very Hard

311.5 PPM

Nearest site
12.1 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

46290

Very Hard

311.5 PPM

Nearest site
10.8 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Carmel Water Department

PWSID IN5229004

Groundwater influenced by surface water
System population served
99,927
Last reported
Jun 30, 2026

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

Citizens Water Of Westfield, Llc

PWSID IN5229009

Groundwater
System population served
61,493
Last reported
Jun 30, 2026

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

Carmel Clay Water

PWSID IN5229024

Surface water
System population served
393
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
Groundwater RuleIN5229004Jan 1, 2024Resolved · health-based
Groundwater RuleIN5229004Jan 1, 2024Resolved
Consumer Confidence RuleIN5229004Jul 1, 2022Resolved
Consumer Confidence RuleIN5229024Jul 1, 2022Resolved
Revised Total Coliform RuleIN5229004Oct 1, 2021Resolved · health-based

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 Carmel

Is the water hard?

The indexed city median is 312 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.