City water profile
Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Aurora, Colorado.
Median indexed hardness
54PPM
11 indexed ZIPs
Range 24.6–60.6 PPM
City summary
Aurora has 11 published ZIP profiles across Arapahoe County and Adams County. The indexed median is 54 PPM, compared with 59 PPM across Colorado.
Among the 58 Coloradocities with an indexed median, Aurora ranks #41from highest to lowest. Across all 161 state ZIP profiles, available estimates run from 13.7to 829 PPM.
The 24.6–60.6 PPM range shows how much the available ZIP estimates vary within the city label.
Hardness distribution
11 of 11 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.
Evidence quality
Confidence labels
Observation window: Jan 5, 2016 to Jun 2, 2026.
ZIP directory
Open a ZIP for site-level provenance and measurements.
ZIP code
52.6 PPM
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ZIP code
52.3 PPM
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ZIP code
53.6 PPM
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ZIP code
55.5 PPM
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ZIP code
55.1 PPM
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ZIP code
60.6 PPM
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ZIP code
54.6 PPM
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ZIP code
54.6 PPM
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ZIP code
50.6 PPM
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ZIP code
52.3 PPM
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ZIP code
24.6 PPM
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Public water systems
PWSID CO0103005
A municipal system, in-state city, and served county all agree with this Census ZCTA.
PWSID CO0103504
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID CO0101725
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 |
|---|---|---|---|
| Consumer Confidence Rule | CO0101725 | Jul 1, 2025 | Unaddressed |
| Lead and Copper Rule | CO0101725 | Jan 1, 2023 | Resolved |
Practical next steps
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Questions people ask
The indexed city median is 54 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.