Greenville County, South Carolina: drinking water report. Greenville County serves about 530,000 residents in the Upstate region of South Carolina.
Greenville County serves about 530,000 residents in the Upstate region of South Carolina. Greenville Water draws from the North Saluda and South Saluda Rivers, treating water at the Stovall Water Treatment Plant. The source watersheds are largely forested and located in the foothills of the Blue Ridge Mountains, providing naturally clean water that requires minimal treatment.
Greenville Water's mountain watershed supply is a significant advantage. The utility has consistently maintained excellent compliance records and the source water quality ranks among the best in the Southeast. UCMR5 data shows minimal PFAS detections in the Greenville system.
According to the South Carolina DHEC's 2024 monitoring data, Greenville Water's PFAS readings were well below proposed federal MCLs. The county does not host major military installations. The primary water quality story in Greenville County is positive – clean source water, competent treatment, and modern infrastructure in most of the service area.
Greenville County residents are in a strong position on water quality. The mountain-fed source and modern treatment system produce consistently clean water.
Check your water for current data in your area. Even with clean supply water, a basic carbon filter can improve chlorine taste. Our water filter guide covers options. Pull your detailed report, and visit our South Carolina page for statewide context.
Drinking water is one exposure route. These federal datasets also cover Greenville County, SC.
The EPA places Greenville County, SC in Zone 1 - the EPA's highest-risk category, where the predicted average indoor radon level is above 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.
37% of homes in Greenville County, SC were built before 1980, and 6% 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 Greenville County, SC averages 8.8 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
16 public water systems serving Greenville County, SC 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. 3 water systems serving Greenville County, SC carry a health-based EPA Safe Drinking Water Act violation.
| Most-cited violation type | Systems affected |
|---|---|
| Lead and Copper Rule Revisions | 1 |
| Surface Water Treatment Rule | 1 |
| Coliform (pre-TCR) | 1 |
| Revised Total Coliform Rule | 1 |
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.