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City water profile

Eau Claire water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Eau Claire, Wisconsin.

Median indexed hardness

282PPM

2 indexed ZIPs

Range 282–282 PPM

State comparison
6 PPM below
State hardness rank
#284 of 479
Matched utilities
8
Active health records
0

City summary

What the indexed records say

Eau Claire has 2 published ZIP profiles across Eau Claire County. The indexed median is 282 PPM, compared with 288 PPM across Wisconsin.

Among the 479 Wisconsincities with an indexed median, Eau Claire ranks #284from highest to lowest. Across all 556 state ZIP profiles, available estimates run from 41.3to 467 PPM.

The 282–282 PPM range shows how much the available ZIP estimates vary within the city label. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.

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
42.3 miles
Profiles with evidence
2/2

Confidence labels

High: 0Moderate: 0Low: 2

Observation window: Jul 11, 2018 to Aug 30, 2018.

ZIP directory

Water reports in Eau Claire

Open a ZIP for site-level provenance and measurements.

ZIP code

54701

Very Hard

282 PPM

Nearest site
41.4 mi
Confidence
Low

View full ZIP evidence →

ZIP code

54703

Very Hard

282 PPM

Nearest site
42.3 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Eau Claire Waterworks

PWSID WI6180230

Groundwater
System population served
70,587
Last reported
May 29, 2026

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

Villa Diann Mhp

PWSID WI6180290

Groundwater
System population served
420
Last reported
May 29, 2026

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

Pine Edge Mhp

PWSID WI6180291

Groundwater
System population served
300
Last reported
May 29, 2026

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

Priory The

PWSID WI6180281

Groundwater
System population served
185
Last reported
May 29, 2026

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

Cozy Mhp Llc Front

PWSID WI6180286

Groundwater
System population served
111
Last reported
May 29, 2026

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

Bonnie Vale Park 1

PWSID WI6180287

Groundwater
System population served
70
Last reported
May 29, 2026

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

Bonnie Vale Park 2

PWSID WI6180300

Groundwater
System population served
51
Last reported
May 29, 2026

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

Cozy Mhp Llc Back

PWSID WI6180513

Groundwater
System population served
35
Last reported
May 29, 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
Combined Radium (-226 and -228)WI6180290Jan 1, 2026Archived · health-based
Lead and Copper RuleWI6180281Jan 1, 2025Resolved
Lead and Copper RuleWI6180286Oct 1, 2024Resolved · health-based
Lead and Copper RuleWI6180290Jun 1, 2024Resolved
Revised Total Coliform RuleWI6180290Jul 1, 2022Resolved
NitrateWI6180286Jul 1, 2022Resolved
Lead and Copper RuleWI6180290Jan 1, 2022Resolved
Lead and Copper RuleWI6180291Jan 1, 2022Resolved
Lead and Copper RuleWI6180281Jan 1, 2022Resolved
Lead and Copper RuleWI6180300Jun 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 Eau Claire

Is the water hard?

The indexed city median is 282 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.