privatewelldata / States / North Carolina
North Carolina well water testing
4 labs are listed on North Carolina’s official certified-lab list; 4% of 340 sampled wells were above the arsenic limit across 57 counties. Updated 2026-10-18.
Coverage map
Where the labs are
| Town | Labs |
|---|---|
| Wilmington | 3 |
| Cary | 1 |
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Well water results by county
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Nitrate: 5% of 1,964 sampled wells statewide. All North Carolina counties →
See all 4 North Carolina lab listings →
How to choose a lab
- Pick a lab on the official list above that is certified for each test you need (bacteria and chemistry are often separate certifications).
- Ask for the lab’s own sample bottles and instructions; bacteria samples usually must reach the lab within 24–30 hours.
- Compare prices for a basic package (bacteria, nitrate, pH/TDS) and add arsenic or other metals where local data shows a risk.
- Be wary of free in-home tests from treatment-system sellers — see our salesperson checklist.
Questions
Where can I get my well water tested in North Carolina?
Use a lab on North Carolina’s official certified-lab list. We count 4 listed labs (excluding those marked as serving public water systems only), most in Wilmington, Cary. Confirm the lab is certified for the exact tests you need before you send a sample.
What should I test my well for in North Carolina?
Test every year for bacteria (total coliform and E. coli), nitrate, pH and total dissolved solids (CDC). In North Carolina, 4% of sampled wells with arsenic data were above the EPA limit, so include arsenic. Use our test helper for a list that fits your home.
Is there well water data for my county in North Carolina?
Yes for 57 counties: we show the share of sampled wells above the EPA arsenic and nitrate limits, from the Water Quality Portal (USGS/EPA). These are monitoring wells as well as private wells, so test your own well.