North Carolina county well guide

Well Water in Guilford County, NC: Testing, Contractors and Rules

About 40,381 households in Guilford County, 20% of the county, rely on a private well. Nobody tests that water unless the owner does.

Labs within 40 milesLicensed contractors
20%of households on a private well
Share on wells, county vs state
Guilford County20%
North Carolina average24%
18licensed contractors serve the county
<1 mito the nearest certified lab, Scientific Analytical Institute
Nostatewide test required when a home is sold

Guilford County has an estimated 40,381 households on private wells, 20% of the county. If you are one of them, testing, treatment and repairs are yours to arrange.

Local rules for wells in Guilford County

Guilford County Environmental Health issues well permits and, under North Carolina law, every new well must be tested within 30 days of completion before it is used for drinking. The county office also collects samples for the State Laboratory for a set fee, which is usually the cheapest route for a routine test.

At a glance

Water test for a new wellRequired

Every newly constructed private well must be tested within 30 days of completion by the State Laboratory of Public Health or a certified lab before it is used for drinking water.

Water test when a home is soldNot required statewide

No statewide requirement at sale. Lenders (FHA, VA, USDA) usually require a test.

What the state recommends

Every year: total and fecal coliform bacteria plus a wellhead inspection. Every 2 years: heavy metals, nitrate and nitrite, lead and copper. Every 5 years: pesticides and volatile organic compounds. Retest after repairs, flooding, a change in water quality, or when an infant or pregnant person is in the home.

Free or low-cost testingAvailable

County health departments collect samples and send them to the State Laboratory of Public Health at set fees that vary by county (often $30 to $100 per panel).

Getting your water tested near Guilford County

7 certified labs within 40 miles serve Guilford County, starting with Dentisafe, Inc. in Suite E Jamestown (in the county). Each card below shows whether the lab takes homeowner samples and which tests it is certified for.

7 certified labs within 40 miles

Licensed well contractors serving Guilford County

17 licensed contractors serve Guilford County, including (Self-Employed) and A Duke Services. Each profile carries the state license number and the date we checked it, and the filters below sort them by drilling, pump work or treatment.

Well depth and water chemistry

What comes up with the water depends on the aquifer. A first full panel tells you which of them apply to your well.

Typical well depth

Varies by location. Check the state well record search for logs of nearby wells.

Contaminants to test for
  • Lead
  • Arsenic
  • Iron
  • Manganese
  • Low pH (corrosive water)
  • Coliform bacteria
  • Radon

Neighboring counties: Randolph County, Forsyth County, Alamance County, Davidson County.

What well work costs in Guilford County

Basic bacteria and nitrate test$25 to $75lab fee, homeowner sample
Full panel lab test$150 to $400metals, VOCs, radiologicals
Well inspection$250 to $550flow, pressure, visual, water test
Submersible pump replacement$1,200 to $4,500parts and labor
Pressure tank replacement$400 to $1,200installed
Whole-house treatment system$800 to $6,000softener, iron filter, UV, RO
New well drilled$5,500 to $25,000about $25 to $65 per foot
Shock chlorination$80 to $300or about $20 as a DIY job

National ranges from published 2025 to 2026 contractor pricing. Local quotes vary with depth, access and materials.

Questions Guilford County well owners ask

How many homes in Guilford County are on a well?

About 40,381, or 20% of households, based on Census housing data and state well surveys. The share is highest outside the towns with public water.

Where is the closest certified lab to Guilford County?

Dentisafe, Inc. in Suite E Jamestown, inside the county. Call first to ask whether they accept homeowner samples.

Do I need a permit to drill a well in Guilford County?

Yes. County Environmental Health issues the permit, and the new well must be tested within 30 days of completion.

What does a well test cost near Guilford County?

A bacteria and nitrate test runs $25 to $75 at most certified labs; a full panel with metals is $150 to $400. County-collected samples sent to the State Laboratory are often cheaper.