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City water profile

Marion water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Marion, Iowa.

Median indexed hardness

267PPM

One indexed ZIP

Range 267–267 PPM

State comparison
14 PPM below
State hardness rank
#529 of 683
Matched utilities
5
Active health records
0

City summary

What the indexed records say

Marion has 1 published ZIP profile across Linn County. The indexed median is 267 PPM, compared with 281 PPM across Iowa.

Among the 683 Iowacities with an indexed median, Marion ranks #529from highest to lowest. Across all 723 state ZIP profiles, available estimates run from 182to 834 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
1.6 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Feb 9, 2016 to Mar 3, 2026.

ZIP directory

Water reports in Marion

Open a ZIP for site-level provenance and measurements.

ZIP code

52302

Very Hard

267 PPM

Nearest site
1.6 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Marion Municipal Water Dept

PWSID IA5751035

Groundwater
System population served
41,623
Last reported
Jun 17, 2026

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

Eagle Ridge

PWSID IA5751602

Groundwater
System population served
1,005
Last reported
Jun 17, 2026

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

Marion Village

PWSID IA5751601

Groundwater
System population served
850
Last reported
Jun 17, 2026

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

Glenbrook Cove Area

PWSID IA5751040

Groundwater influenced by surface water
System population served
233
Last reported
Jun 17, 2026

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

Meadow Knolls Addition

PWSID IA5751301

Groundwater
System population served
53
Last reported
Jun 17, 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.

No violation records are included in the current lookback window.

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 Marion

Is the water hard?

The indexed city median is 267 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.