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City water profile

Zionsville water quality

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

Median indexed hardness

312PPM

2 indexed ZIPs

Range 311.5–311.5 PPM

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

City summary

What the indexed records say

Zionsville has 2 published ZIP profiles across Hamilton County and Boone County. The indexed median is 312 PPM, compared with 313 PPM across Indiana.

Among the 386 Indianacities with an indexed median, Zionsville ranks #206from 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 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
18.7 miles
Profiles with evidence
2/2

Confidence labels

High: 0Moderate: 2Low: 0

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

ZIP directory

Water reports in Zionsville

Open a ZIP for site-level provenance and measurements.

ZIP code

46069

Very Hard

311.5 PPM

Nearest site
18.7 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

46077

Very Hard

311.5 PPM

Nearest site
7.8 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Citizens Water - Whitestown

PWSID IN5206014

Surface water
System population served
5,880
Last reported
Jun 30, 2026

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

Pine Ridge

PWSID IN5206004

Groundwater
System population served
135
Last reported
Jun 30, 2026

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

Zionsville Mhp Trust

PWSID IN5206002

Groundwater
System population served
57
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 RuleIN5206002Jan 1, 2026Resolved
Radium-226IN5206002Jan 1, 2026Archived
Radium-228IN5206002Jan 1, 2026Archived
Gross Alpha, Excl. Radon and UIN5206002Jan 1, 2026Archived
Consumer Confidence RuleIN5206002Oct 1, 2025Resolved
Consumer Confidence RuleIN5206014Jul 1, 2025Resolved
Revised Total Coliform RuleIN5206002Jul 1, 2025Resolved
Consumer Confidence RuleIN5206002Jul 1, 2025Resolved
Revised Total Coliform RuleIN5206002Jun 1, 2025Resolved
Revised Total Coliform RuleIN5206002May 1, 2025Resolved

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 Zionsville

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.