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City water profile

Plymouth water quality

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

Median indexed hardness

382PPM

One indexed ZIP

Range 382–382 PPM

State comparison
94 PPM above
State hardness rank
#75 of 479
Matched utilities
4
Active health records
0

City summary

What the indexed records say

Plymouth has 1 published ZIP profile across Sheboygan County. The indexed median is 382 PPM, compared with 288 PPM across Wisconsin.

Among the 479 Wisconsincities with an indexed median, Plymouth ranks #75from 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.

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
14.8 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: May 17, 2021 to Sep 9, 2024.

ZIP directory

Water reports in Plymouth

Open a ZIP for site-level provenance and measurements.

ZIP code

53073

Very Hard

382 PPM

Nearest site
14.8 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Plymouth Utilities

PWSID WI4600446

Groundwater
System population served
8,964
Last reported
May 29, 2026

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

Kettle Moraine Correctional Institution

PWSID WI4600449

Groundwater
System population served
1,544
Last reported
May 29, 2026

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

Lakeland University

PWSID WI4600487

Groundwater
System population served
1,200
Last reported
May 29, 2026

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

Rocky Knoll Health Care Fac

PWSID WI4600447

Groundwater
System population served
564
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
Lead and Copper RuleWI4600487Jan 1, 2026Resolved
NitrateWI4600446Apr 1, 2024Resolved

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 Plymouth

Is the water hard?

The indexed city median is 382 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.