City water profile
Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Apex, North Carolina.
Median indexed hardness
41PPM
4 indexed ZIPs
Range 39.8–40.5 PPM
City summary
Apex has 4 published ZIP profiles across Wake County and Chatham County. The indexed median is 41 PPM, compared with 41 PPM across North Carolina.
Among the 381 North Carolinacities with an indexed median, Apex ranks #222from 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
40.5 PPM
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ZIP code
40.5 PPM
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ZIP code
39.8 PPM
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ZIP code
40.5 PPM
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Public water systems
PWSID NC0392045
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC0319126
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC4092134
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC4092005
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC4392101
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC0392060
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC0392397
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC0392358
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC0392321
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC0392248
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 | NC0392060 | Dec 1, 2025 | Resolved |
| Chlorine | NC0392060 | Dec 1, 2025 | Resolved |
| Consumer Confidence Rule | NC0392060 | Jul 1, 2025 | Resolved |
| Public Notice | NC0319124 | Feb 6, 2025 | Resolved |
| Chlorine | NC0392060 | Feb 1, 2025 | Resolved |
| Revised Total Coliform Rule | NC0392060 | Feb 1, 2025 | Resolved |
| TTHM | NC0392060 | Jan 1, 2025 | Archived |
| Total Haloacetic Acids (HAA5) | NC0392060 | Jan 1, 2025 | Archived |
| Lead and Copper Rule | NC0319124 | Jan 1, 2025 | Resolved |
| Nitrate | NC0392159 | Jan 1, 2025 | Archived |
Practical next steps
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Questions people ask
The indexed city median is 41 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.