Air Quality
Good
Water Violations
88
Active Contamination
48
Active Permits
40
Air quality in Guilford County is rated good with a median AQI of 43 (273 days measured in 2025). 42 community water systems serve the area, with 88 recent violations in the last 5 years. 50 industrial facilities report toxic chemical releases totaling 123.3K lbs. 51 contamination sites are tracked, all with completed or ongoing remediation.
Air Quality — Guilford County (2025)i
AQSThe Air Quality Index measures how clean or polluted the air is on a given day. AQI is reported at the county level. A score of 0-50 is considered good; 51-100 is moderate; above 100 may be unhealthy for sensitive groups.
Median AQI
PM2.5 Daysi
164Ozone Daysi
108Drinking Wateri
SDWISPublic water systems registered to serve this area. Community systems (CWS) provide water to residents year-round. Violations indicate a system failed to meet federal drinking water standards.
Community Systemsi
42Active Systemsi
6Recent Violationsi
88Recent Violations (Last 5 Years)
Historical Violations (Over 5 Years Ago)
COLONIAL HEIGHTS S/D
BRADY MHP
JONES MHP
O`HENRY MHP
PLEASANT ACRES MHP
SERENITY CARE REST HOME
STEEPLECHASE APARTMENTS
LAKE BRANDT APARTMENTS
BEECHWOOD APARTMENTS
PARK FOREST APARTMENTS
WIND LAKE I APARTMENTS
BRIDFORD LAKE APARTMENTS
MARCHESTER APARTMENTS
Industrial Monitoringi
Toxic Release Inventory (TRI)i
TRIWastewater & Stormwater Permits (NPDES)i
NPDESContamination Sitesi
Contaminated sites tracked by the EPA and state agencies. Superfund sites are the most seriously contaminated locations. Brownfields are former industrial properties being cleaned up for reuse. LUST sites have confirmed leaks from underground storage tanks.