Polk County, North Carolina: drinking water report. Polk County – Tryon and Columbus – serves about 20,000 residents on the NC-SC border in the Blue Ridge…
Polk County – Tryon and Columbus – serves about 20,000 residents on the NC-SC border in the Blue Ridge foothills. Water comes from mountain streams and springs in the thermal belt region.
Polk County's mountain sources produce clean water. UCMR5 data shows no PFAS detections. According to NC DEQ's 2024 data, systems met all standards. The county's small size and rural character limit contamination sources.
Polk County's water quality is excellent.
Check your water for data. Our water filter guide covers options. Pull your detailed report, and visit our North Carolina page for statewide data.
Drinking water is one exposure route. These federal datasets also cover Polk County, NC.
The EPA places Polk County, NC in Zone 2 - a moderate-risk category, with a predicted average indoor radon level between 2 and 4 pCi/L. Zone maps predict an area's radon potential from geology and existing indoor readings; they say nothing about a specific house. Testing is the only way to know your own level.
47% of homes in Polk County, NC were built before 1980, and 13% before 1950. Residential lead paint was banned in 1978, so housing age is the strongest available proxy for lead-paint exposure. This describes the county's housing stock, not any one home.
Modelled annual fine-particle pollution (PM2.5) in Polk County, NC averages 7.4 µg/m³, within the EPA's annual standard of 9 µg/m³. These are CDC modelled county estimates rather than readings from a specific monitor.
How radon zones work · Air quality by county · Lead exposure guide
8 public water systems serving Polk County, NC have EPA lead testing on record. The reported lead sample skews toward systems that already flagged a problem, so its exceedance rate is not directly comparable with other areas. 2 water systems serving Polk County, NC carry a health-based EPA Safe Drinking Water Act violation.
| Most-cited violation type | Systems affected |
|---|---|
| Lead and Copper Rule Revisions | 2 |
Source: EPA Lead and Copper Rule 90th-percentile tap sampling and EPA SDWIS Safe Drinking Water Act enforcement records, aggregated from the public water systems serving this county. Figures are counts of water systems, not a test of any individual home or tap.