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City water profile

Waupun water quality

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

Median indexed hardness

330PPM

One indexed ZIP

Range 329.5–329.5 PPM

State comparison
42 PPM above
State hardness rank
#135 of 479
Matched utilities
3
Active health records
0

City summary

What the indexed records say

Waupun has 1 published ZIP profile across Fond Du Lac County. The indexed median is 330 PPM, compared with 288 PPM across Wisconsin.

Among the 479 Wisconsincities with an indexed median, Waupun ranks #135from highest to lowest. Across all 556 state ZIP profiles, available estimates run from 41.3to 467 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. 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 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
31.3 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Aug 2, 2016 to Sep 9, 2024.

ZIP directory

Water reports in Waupun

Open a ZIP for site-level provenance and measurements.

ZIP code

53963

Very Hard

329.5 PPM

Nearest site
31.3 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Waupun Utilities

PWSID WI1140131

Groundwater
System population served
8,056
Last reported
May 29, 2026

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

Waupun Correctional Inst

PWSID WI1140142

Groundwater
System population served
3,706
Last reported
May 29, 2026

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

Marshview Terrace

PWSID WI1140156

Groundwater
System population served
40
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
Gross Alpha, Excl. Radon and UWI1140156Jan 1, 2026Archived · health-based
Combined Radium (-226 and -228)WI1140156Jan 1, 2026Archived · health-based
Gross Alpha, Excl. Radon and UWI1140156Oct 1, 2025Archived · health-based
Radium-226WI1140156Jul 1, 2025Resolved
Radium-228WI1140156Jul 1, 2025Resolved
Combined Radium (-226 and -228)WI1140156Apr 1, 2025Archived · health-based
Consumer Confidence RuleWI1140142Jul 1, 2024Resolved
Consumer Confidence RuleWI1140142Jul 1, 2024Resolved
Revised Total Coliform RuleWI1140156Jun 1, 2024Resolved
Combined Radium (-226 and -228)WI1140142Apr 1, 2023Archived · health-based

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 Waupun

Is the water hard?

The indexed city median is 330 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.