Well water in Lincoln County, North Carolina

In Lincoln County, 4% of 2,333 private wells tested between 1998 and 2019 had arsenic above the North Carolina groundwater standard (10 ug/L), according to the NC State Laboratory of Public Health (NCWELL).

2,333 private wells tested 1998 to 2019 in state summaries; 1 individual samples from 1 wells, 1991. Data refreshed September 9, 2026.

What homeowner tests found

NCWELL private well summaries: private wells tested and reported to the state, 1998 to 2019. Shares are against the level the state applies to each contaminant, named in the last column; several are stricter than EPA.

Contaminant	Wells tested	Above state level	Highest	State level
Iron	1,665	24%	64,000	300 ug/L
Manganese	2,326	17%	3,000	50 ug/L
Arsenic	2,333	4%	390	10 ug/L
Lead	2,325	1%	208	15 ug/L
Nitrate	1,276	1%	37	10 mg/L
Copper	1,665	<1%	11	1 mg/L
Nitrite	1,276	<1%	1	1 mg/L

Get the free Lincoln County well report

One email with the numbers above, what they mean for a home in Lincoln County, exactly which tests to order, and what treatment fits the local profile. No spam, unsubscribe in one click.

What this means

Among homeowners in Lincoln County who sent a sample to the state lab, the health-based limits most often exceeded were arsenic (4% of 2,333 wells), lead (1% of 2,325 wells), and nitrate (1% of 1,276 wells). These are ordinary wells tested by their owners, so the shares are the best available picture of a typical well here, with one caveat: people test more often when they suspect a problem.

Iron and manganese exceed the state's advisory level in a sizable share of wells; these are mostly a taste, staining or diet issue rather than a toxicity one.

What to test for in Lincoln County

Volatile organic compounds (VOCs)157 leaking underground storage tank sites on record locally.
Iron24% of 1,665 local wells tested were above the North Carolina groundwater standard.
Manganese17% of 2,326 local wells tested were above the North Carolina groundwater standard.
Arsenic4% of 2,333 local wells tested were above the North Carolina groundwater standard.
Lead1% of 2,325 local wells tested were above the North Carolina groundwater standard.
Nitrate1% of 1,276 local wells tested were above the EPA limit.
Copper<1% of 1,665 local wells tested were above the North Carolina groundwater standard.
Nitrite<1% of 1,276 local wells tested were above the EPA limit.
Coliform bacteriaRecommended for every private well, every year.

Contamination sources on record in Lincoln County

NC DEQ records 157 leaking underground storage tank sites in Lincoln County, among 157 regulated sites in total. Groundwater does not follow property lines, so a well within a few hundred feet of one of these is worth testing for what that site could release.

157: leaking underground storage tank sitesGasoline and heating oil that leaked from tanks move through groundwater as benzene, MTBE and other volatile organic compounds.

Treatment that fits the local profile

Iron: Oxidizing filter whole-house; Water softener (low levels); Aeration plus filtration
Manganese: Oxidizing filter (greensand, birm) whole-house; Water softener (low levels); Point-of-use reverse osmosis

Get your Lincoln County water tested at home

A licensed local water treatment company tests your tap water in your home, walks you through the numbers, and quotes treatment only if something needs fixing. Free, about 30 minutes, no obligation. Tell us what you need and we match you with a company that serves Lincoln County.

Common questions

How often should I test a private well in Lincoln County?

Test for bacteria and nitrate every year. Test once for arsenic, uranium, radon, fluoride, manganese and PFAS, then again every three to five years or after any change in taste, color, or plumbing.

Sources

USGS Water Quality Portal: 2 samples in Lincoln County. Data from the Water Quality Portal, a service of USGS, EPA and USDA; groundwater samples collected by USGS and cooperators. Retrieved September 3, 2026.
NCWELL private well summaries: summaries for 7 contaminants in Lincoln County, up to 2,333 wells each. County summaries of private well tests run by the NC State Laboratory of Public Health, 1998 to 2019, compiled by the UNC Superfund Research Program (NCWELL database). Counts are tests, not distinct wells; since 2008 every new well is tested once, so most tests are unique wells. Shares are against the NC 2L groundwater standard where one exists (manganese 50 ug/L, lead 15, iron 300) and otherwise the EPA limit. Medians are not used because more than half of results sit at the reporting limit for most analytes. Retrieved September 9, 2026.
NC DEQ regulated sites: 157 regulated sites located in Lincoln County. Underground storage tank incidents from the North Carolina Department of Environmental Quality UST Section. Retrieved September 9, 2026.

Non-detects count as samples and are treated as zero when computing medians. Exactly at the limit counts as not above it. A sample belongs to the town containing the well's reported coordinates.