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City water profile

Superior water quality

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

Median indexed hardness

76PPM

2 indexed ZIPs

Range 75.5–75.5 PPM

State comparison
212 PPM below
State hardness rank
#467 of 479
Matched utilities
2
Active health records
1

City summary

What the indexed records say

Superior has 2 published ZIP profiles across Douglas County. The indexed median is 76 PPM, compared with 288 PPM across Wisconsin.

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

The 75.5–75.5 PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard2 ZIPs
Hard0 ZIPs
Very hard0 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
13.2 miles
Profiles with evidence
2/2

Confidence labels

High: 0Moderate: 2Low: 0

Observation window: Feb 1, 2016 to Apr 27, 2022.

ZIP directory

Water reports in Superior

Open a ZIP for site-level provenance and measurements.

ZIP code

54874

Moderately Hard

75.5 PPM

Nearest site
13.2 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

54880

Moderately Hard

75.5 PPM

Nearest site
5.9 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Superior Water Light & Power Company

PWSID WI8160147

Surface water
System population served
26,084
Last reported
May 29, 2026

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

Manitou Falls Sanitary District No 1

PWSID WI8160145

Groundwater
System population served
95
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

1 unique active health-based record appears among associated systems. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
Groundwater RuleWI8160145Mar 21, 2026Unaddressed
E. COLIWI8160145Jan 14, 2026Unaddressed
E. COLIWI8160145Dec 24, 2025Unaddressed
E. COLIWI8160145Dec 10, 2025Unaddressed
E. COLIWI8160145Oct 15, 2025Unaddressed
Consumer Confidence RuleWI8160145Jul 1, 2025Unaddressed
Lead and Copper RuleWI8160145Jul 1, 2025Unaddressed
Consumer Confidence RuleWI8160145Jul 1, 2025Unaddressed
Lead and Copper RuleWI8160145Mar 26, 2025Unaddressed · health-based
Public NoticeWI8160145Mar 26, 2025Unaddressed

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 Superior

Is the water hard?

The indexed city median is 76 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.