Certified labs by state
North Carolina
North Carolina has many private-well households, and state guidance is unusually specific: new private drinking-water wells must be sampled within 30 days after completion, while ongoing testing of existing wells is the owner’s responsibility. The most useful NC starting points are NCDHHS for health/testing guidance, your county health department for sampling logistics, and NC DEQ’s certified-lab listings for commercial testing options. ([epi.dph.ncdhhs.gov](https://epi.dph.ncdhhs.gov/oee/wellwater/faqs.html?utm_source=openai))
Checked against official sources on October 4, 2026. Rules and links change; confirm with the office listed before you act.
- Certifies drinking water labs
- North Carolina State Laboratory of Public Health / North Carolina Department of Environmental Quality certified laboratory program
- Official certified lab list
- Official page →
- Free or low-cost testing
- There is no statewide year-round free private-well testing program listed for all residents; NCDHHS says procedures and fees vary by county. After some storm events, the State Laboratory may provide no-charge kits through affected local health departments. ([epi.dph.ncdhhs.gov](https://epi.dph.ncdhhs.gov/oee/wellwater/faqs.html?utm_source=openai))
Official resources in North Carolina
NCDHHS guidance on when to test, what to test for, and how North Carolina residents can use local health departments or state-certified labs. ([epi.dph.ncdhhs.gov](https://epi.dph.ncdhhs.gov/oee/wellwater/faqs.html?utm_source=openai))
County contact list for arranging state-lab sampling, asking about county procedures, and checking local fees or ordinances. ([dph.ncdhhs.gov](https://www.dph.ncdhhs.gov/contact/LHD?utm_source=openai))
NC DEQ page linking to current in-state and out-of-state certified laboratory lists for drinking-water analyses. ([deq.nc.gov](https://www.deq.nc.gov/about/divisions/water-resources/water-sciences/chemistry-laboratory/certified-laboratory-listing?utm_source=openai))
Official NCDHHS tool that helps North Carolina residents interpret lab results and see recommended treatment or follow-up steps. ([dph.ncdhhs.gov](https://www.dph.ncdhhs.gov/be-well-informed-tool?utm_source=openai))
State program page with rules, homeowner guidance, and links for private-well construction, sampling, and interpretation resources. ([dph.ncdhhs.gov](https://www.dph.ncdhhs.gov/programs/environmental-health/site-water-protection-branch/private-wells-program?utm_source=openai))
Key facts for North Carolina
- Newly constructed private drinking-water wells in North Carolina must be tested within 30 days of well completion before use as a drinking-water source. ([epi.dph.ncdhhs.gov](https://epi.dph.ncdhhs.gov/oee/wellwater/faqs.html?utm_source=openai))
- For existing wells, NCDHHS recommends yearly bacteria testing, every-two-year testing for heavy metals/nitrates/nitrites/lead/copper, and every-five-year testing for pesticides and VOCs. ([epi.dph.ncdhhs.gov](https://epi.dph.ncdhhs.gov/oee/wellwater/faqs.html?utm_source=openai))
- North Carolina says many private wells have excessive lead, arsenic, iron, manganese, low pH, and harmful bacteria. ([epi.dph.ncdhhs.gov](https://epi.dph.ncdhhs.gov/oee/wellwater/faqs.html?utm_source=openai))
- Boiling well water does not remove nitrates; NCDHHS says households with pregnancy or infants should test for nitrates and use alternate water if nitrates are present. ([epi.dph.ncdhhs.gov](https://epi.dph.ncdhhs.gov/oee/wellwater/faqs.html?utm_source=openai))
- State radon guidance recommends both indoor-air and private-well-water testing in many NC counties, especially across parts of the Piedmont and mountains. ([ncdhhs.gov](https://www.ncdhhs.gov/divisions/health-service-regulation/north-carolina-radon-program/radon-community-health-assessment-toolkit?utm_source=openai))
- NC DEQ says its certified-lab listings are updated about every six months and may not reflect real-time certification changes. ([deq.nc.gov](https://www.deq.nc.gov/about/divisions/water-resources/water-sciences/chemistry-laboratory/certified-laboratory-listing?utm_source=openai))
What to do next
- Call your county health department first to ask about sampling through the State Lab, county-specific procedures, and current fees before paying a private lab. ([epi.dph.ncdhhs.gov](https://epi.dph.ncdhhs.gov/oee/wellwater/faqs.html?utm_source=openai))
- If your well flooded, was repaired, or your water’s taste/color/odor changed, test promptly rather than waiting for the routine schedule. ([epi.dph.ncdhhs.gov](https://epi.dph.ncdhhs.gov/oee/wellwater/faqs.html?utm_source=openai))
- After you get results, enter them into the Be Well Informed Tool and compare any treatment advice with the exact contaminants your lab reported. ([dph.ncdhhs.gov](https://www.dph.ncdhhs.gov/be-well-informed-tool?utm_source=openai))
Helpful guides
- How to choose a state-certified drinking water lab
- What to test your private well water for (and how often)
- How to collect a well water sample without ruining the test
- How to read a water test report: MCLs, units and flags