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City water profile

Plainfield water quality

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

Median indexed hardness

350PPM

One indexed ZIP

Range 349.5–349.5 PPM

State comparison
37 PPM above
State hardness rank
#60 of 386
Matched utilities
2
Active health records
0

City summary

What the indexed records say

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

Among the 386 Indianacities with an indexed median, Plainfield ranks #60from 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.

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
9.2 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Mar 30, 2016 to Sep 10, 2025.

ZIP directory

Water reports in Plainfield

Open a ZIP for site-level provenance and measurements.

ZIP code

46168

Very Hard

349.5 PPM

Nearest site
9.2 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Plainfield Water Works

PWSID IN5232020

Groundwater
System population served
34,477
Last reported
Jun 30, 2026

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

Plainfield Re-Entry Educational Facility

PWSID IN5232007

Groundwater
System population served
4,500
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
LEAD AND COPPER RULE REVISIONSIN5232007Jul 2, 2025Resolved
Revised Total Coliform RuleIN5232020Jan 1, 2024Resolved
Consumer Confidence RuleIN5232020Oct 1, 2022Resolved
Consumer Confidence RuleIN5232007Oct 1, 2022Resolved
TTHMIN5232007Jan 1, 2021Archived
Total Haloacetic Acids (HAA5)IN5232007Jan 1, 2021Archived

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 Plainfield

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.