City water profile
Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Napoleon, Michigan.
Median indexed hardness
375PPM
2 indexed ZIPs
Range 374.5–374.5 PPM
City summary
Napoleon has 2 published ZIP profiles across Jackson County. The indexed median is 375 PPM, compared with 283 PPM across Michigan.
Among the 374 Michigancities with an indexed median, Napoleon ranks #91from highest to lowest. Across all 512 state ZIP profiles, available estimates run from 41.3to 459.5 PPM.
The 374.5–374.5 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: Jun 20, 2016 to Oct 11, 2023.
ZIP directory
Open a ZIP for site-level provenance and measurements.
Public water systems
PWSID MI0004605
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 | MI0004605 | Aug 1, 2022 | Resolved |
| Revised Total Coliform Rule | MI0004605 | Feb 1, 2021 | Resolved |
Practical next steps
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Questions people ask
The indexed city median is 375 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.