City water profile
Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Sierra Vista, Arizona.
Median indexed hardness
245PPM
2 indexed ZIPs
Range 245–245 PPM
City summary
Sierra Vista has 2 published ZIP profiles across Cochise County. The indexed median is 245 PPM, compared with 241 PPM across Arizona.
Among the 133 Arizonacities with an indexed median, Sierra Vista ranks #67from highest to lowest. Across all 285 state ZIP profiles, available estimates run from 66.4to 1250 PPM.
The 245–245 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: Jan 11, 2016 to Mar 31, 2026.
ZIP directory
Open a ZIP for site-level provenance and measurements.
Public water systems
PWSID AZ0402010
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID AZ0402044
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID AZ0402004
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID AZ0402007
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID AZ0402028
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID AZ0402029
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID AZ0402011
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID AZ0402094
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID AZ0402101
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID AZ0402054
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 |
|---|---|---|---|
| Di(2-ethylhexyl) phthalate | AZ0402044 | Jul 1, 2025 | Resolved |
| Lead and Copper Rule | AZ0402009 | Jan 1, 2025 | Resolved |
| Public Notice | AZ0402101 | Dec 20, 2024 | Resolved |
| E. COLI | AZ0402044 | Nov 13, 2024 | Resolved |
| E. COLI | AZ0402044 | Nov 13, 2024 | Resolved |
| E. COLI | AZ0402044 | Nov 13, 2024 | Resolved |
| LEAD AND COPPER RULE REVISIONS | AZ0402044 | Oct 17, 2024 | Resolved |
| LEAD AND COPPER RULE REVISIONS | AZ0402044 | Oct 17, 2024 | Resolved · health-based |
| LEAD AND COPPER RULE REVISIONS | AZ0402004 | Oct 17, 2024 | Resolved |
| LEAD AND COPPER RULE REVISIONS | AZ0402004 | Oct 17, 2024 | Resolved · health-based |
Practical next steps
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Questions people ask
The indexed city median is 245 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.