City water profile
Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Durham, North Carolina.
Median indexed hardness
41PPM
10 indexed ZIPs
Range 40.5–40.5 PPM
City summary
Durham has 10 published ZIP profiles across Durham County. The indexed median is 41 PPM, compared with 41 PPM across North Carolina.
Among the 381 North Carolinacities with an indexed median, Durham ranks #223from highest to lowest. Across all 519 state ZIP profiles, available estimates run from 4.7to 267.5 PPM.
The 40.5–40.5 PPM range shows how much the available ZIP estimates vary within the city label.
Hardness distribution
10 of 10 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.
Evidence quality
Confidence labels
Observation window: Jan 15, 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
40.5 PPM
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ZIP code
40.5 PPM
View full ZIP evidence →
ZIP code
40.5 PPM
View full ZIP evidence →
ZIP code
40.5 PPM
View full ZIP evidence →
ZIP code
40.5 PPM
View full ZIP evidence →
ZIP code
40.5 PPM
View full ZIP evidence →
ZIP code
40.5 PPM
View full ZIP evidence →
ZIP code
40.5 PPM
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Public water systems
PWSID NC0332010
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC0332139
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC0332111
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC0332119
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC0368105
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC0332106
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC0332122
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC0332116
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC0332121
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NC0368122
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 |
|---|---|---|---|
| Public Notice | NC0332106 | Feb 15, 2026 | Addressed |
| Public Notice | NC0332106 | Feb 15, 2026 | Addressed |
| Public Notice | NC0332106 | Feb 15, 2026 | Addressed |
| Chlorine | NC0368122 | Feb 1, 2026 | Resolved |
| Revised Total Coliform Rule | NC0368122 | Feb 1, 2026 | Resolved |
| Revised Total Coliform Rule | NC0332106 | Nov 1, 2025 | Resolved |
| Lead and Copper Rule | NC0332106 | Oct 1, 2025 | Addressed |
| E. COLI | NC0332106 | Aug 6, 2025 | Resolved |
| Public Notice | NC0332106 | Jul 4, 2025 | Addressed |
| Consumer Confidence Rule | NC0332106 | Jul 1, 2025 | Addressed |
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.