York County, South Carolina: drinking water report. York County lies south of Charlotte, NC, home to about 290,000 residents in communities like Rock Hill,…
York County lies south of Charlotte, NC, home to about 290,000 residents in communities like Rock Hill, Fort Mill, and York. York County's water comes from the Catawba River system – the same source that feeds Charlotte. Catawba River Water Treatment Plant and Lake Wylie provide the primary supply.
The Catawba River's quality at York County is influenced by upstream activity in North Carolina, including Charlotte's treated wastewater returns and Duke Energy's coal ash legacy along the river. UCMR5 data shows low-level PFAS detections in county systems.
According to the South Carolina DHEC's 2024 monitoring data, county systems met federal standards. The cross-state watershed dynamics mean North Carolina's regulatory decisions affect South Carolina's source water quality.
York County's water quality tracks with the Catawba River's overall health, which depends partly on what happens upstream in North Carolina.
Check your water for current data. A carbon or reverse osmosis filter provides additional protection. Our water filter guide covers options. Pull your detailed report, and visit our South Carolina page for statewide data.