City water profile
Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Gillette, Wyoming.
Median indexed hardness
215PPM
2 indexed ZIPs
Range 215–215 PPM
City summary
Gillette has 2 published ZIP profiles across Campbell County. The indexed median is 215 PPM, compared with 235 PPM across Wyoming.
Among the 86 Wyomingcities with an indexed median, Gillette ranks #54from highest to lowest. Across all 97 state ZIP profiles, available estimates run from 3.2to 1905 PPM.
The 215–215 PPM range shows how much the available ZIP estimates vary within the city label.
Hardness distribution
2 of 2 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.
Evidence quality
Confidence labels
Observation window: Jul 11, 2016 to Sep 2, 2016.
ZIP directory
Open a ZIP for site-level provenance and measurements.
Public water systems
PWSID WY5600019
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID WY5600764
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID WY5600251
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID WY5600745
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID WY5600249
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID WY5601239
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID WY5601353
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID WY5600853
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID WY5600760
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID WY5600789
The system names this served city; Census place overlap links the city to this ZCTA.
Compliance history
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.
| Record | System | Period | Status |
|---|---|---|---|
| Revised Total Coliform Rule | WY5600145 | Mar 1, 2026 | Archived |
| Revised Total Coliform Rule | WY5600145 | Feb 1, 2026 | Archived |
| Revised Total Coliform Rule | WY5600145 | Jan 1, 2026 | Archived |
| Revised Total Coliform Rule | WY5600145 | Dec 1, 2025 | Archived |
| E. COLI | WY5601739 | Sep 17, 2025 | Resolved |
| E. COLI | WY5601474 | Aug 28, 2025 | Resolved |
| Revised Total Coliform Rule | WY5601474 | Apr 1, 2025 | Resolved |
| Gross Alpha, Excl. Radon and U | WY5601739 | Jan 1, 2025 | Resolved |
| Radium-226 | WY5601739 | Jan 1, 2025 | Resolved |
| Radium-228 | WY5601739 | Jan 1, 2025 | Resolved |
Practical next steps
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Questions people ask
The indexed city median is 215 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.
Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.
Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.