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City water profile

Centennial water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Centennial, Wyoming.

Median indexed hardness

346PPM

One indexed ZIP

Range 346–346 PPM

State comparison
111 PPM above
State hardness rank
#22 of 86
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Centennial has 1 published ZIP profile across Albany County. The indexed median is 346 PPM, compared with 235 PPM across Wyoming.

Among the 86 Wyomingcities with an indexed median, Centennial ranks #22from highest to lowest. Across all 97 state ZIP profiles, available estimates run from 3.2to 1905 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
37.5 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Sep 13, 2016 to Feb 29, 2024.

ZIP directory

Water reports in Centennial

Open a ZIP for site-level provenance and measurements.

ZIP code

82055

Very Hard

346 PPM

Nearest site
37.5 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Centennial Water And Sewer District

PWSID WY5601232

Groundwater
System population served
150
Last reported
Jun 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
ChlorineWY5601232Jan 1, 2023Resolved
Lead and Copper RuleWY5601232Oct 1, 2022Resolved
Revised Total Coliform RuleWY5601232Jul 1, 2022Resolved

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 Centennial

Is the water hard?

The indexed city median is 346 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.