City water profile
Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Cary, North Carolina.
Median indexed hardness
40PPM
4 indexed ZIPs
Range 39.8–40.5 PPM
City summary
Cary has 4 published ZIP profiles across Wake County. The indexed median is 40 PPM, compared with 41 PPM across North Carolina.
Among the 381 North Carolinacities with an indexed median, Cary ranks #234from highest to lowest. Across all 519 state ZIP profiles, available estimates run from 4.7to 267.5 PPM.
The 39.8–40.5 PPM range shows how much the available ZIP estimates vary within the city label.
Hardness distribution
4 of 4 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.
Evidence quality
Confidence labels
Observation window: Jan 14, 2016 to Jun 9, 2026.
ZIP directory
Open a ZIP for site-level provenance and measurements.
ZIP code
40.2 PPM
View full ZIP evidence →
ZIP code
40.2 PPM
View full ZIP evidence →
ZIP code
39.8 PPM
View full ZIP evidence →
ZIP code
40.5 PPM
View full ZIP evidence →
Public water systems
PWSID NC0392020
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC0392160
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC4392162
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC0392361
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC4392102
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC4092069
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC0392381
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC4092021
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC4392131
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC4392229
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 | NC0392160 | Jul 1, 2024 | Resolved |
| Consumer Confidence Rule | NC0392361 | Jul 1, 2024 | Resolved |
| Consumer Confidence Rule | NC4392102 | Jul 1, 2024 | Resolved |
| Consumer Confidence Rule | NC0392381 | Jul 1, 2024 | Resolved |
| Consumer Confidence Rule | NC4092021 | Jul 1, 2024 | Resolved |
| Consumer Confidence Rule | NC4392131 | Jul 1, 2024 | Resolved |
| Consumer Confidence Rule | NC4392229 | Jul 1, 2024 | Resolved |
| Revised Total Coliform Rule | NC4092021 | Jan 11, 2024 | Resolved |
| Revised Total Coliform Rule | NC4392131 | Jan 11, 2024 | Resolved |
| Revised Total Coliform Rule | NC0392160 | Dec 11, 2023 | Resolved |
Practical next steps
Continue comparing
Questions people ask
The indexed city median is 40 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.