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City water profile

Kokomo water quality

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

Median indexed hardness

316PPM

3 indexed ZIPs

Range 316–316 PPM

State comparison
3 PPM above
State hardness rank
#195 of 386
Matched utilities
7
Active health records
0

City summary

What the indexed records say

Kokomo has 3 published ZIP profiles across Howard County. The indexed median is 316 PPM, compared with 313 PPM across Indiana.

Among the 386 Indianacities with an indexed median, Kokomo ranks #195from highest to lowest. Across all 472 state ZIP profiles, available estimates run from 132to 371 PPM.

The 316–316 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 hard3 ZIPs

3 of 3 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 miles
Profiles with evidence
3/3

Confidence labels

High: 0Moderate: 3Low: 0

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

ZIP directory

Water reports in Kokomo

Open a ZIP for site-level provenance and measurements.

ZIP code

46901

Very Hard

316 PPM

Nearest site
6.4 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

46902

Very Hard

316 PPM

Nearest site
12 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

46965

Very Hard

316 PPM

Nearest site
13.4 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Indiana American Water - Kokomo

PWSID IN5234007

Surface water
System population served
59,313
Last reported
Jun 30, 2026

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

Oak Brook Estates

PWSID IN5234003

Groundwater
System population served
455
Last reported
Jun 30, 2026

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

Western Estates Mobile Home Park

PWSID IN5234002

Groundwater
System population served
248
Last reported
Jun 30, 2026

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

Timbernest Townhouses

PWSID IN5234014

Groundwater
System population served
175
Last reported
Jun 30, 2026

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

The Oaks Of Kokomo

PWSID IN5234001

Groundwater
System population served
150
Last reported
Jun 30, 2026

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

Village Green Mobile Home Park

PWSID IN5234009

Groundwater
System population served
102
Last reported
Jun 30, 2026

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

Dixon Woods Apartments

PWSID IN5234011

Groundwater
System population served
25
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
Consumer Confidence RuleIN5234009Oct 1, 2025Resolved
Revised Total Coliform RuleIN5234011May 1, 2025Resolved
Consumer Confidence RuleIN5234003Oct 7, 2024Resolved
NitriteIN5234011Apr 1, 2024Resolved
Revised Total Coliform RuleIN5234011Jul 1, 2023Resolved
Revised Total Coliform RuleIN5234011Mar 1, 2023Resolved
Consumer Confidence RuleIN5234003Oct 1, 2022Resolved
Revised Total Coliform RuleIN5234002Oct 1, 2022Resolved
Lead and Copper RuleIN5234009Jan 1, 2022Resolved
Revised Total Coliform RuleIN5234009Dec 1, 2021Resolved

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 Kokomo

Is the water hard?

The indexed city median is 316 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.