Greenville County, South Carolina has about 570,745 residents (Census 2024 estimate) and 8 community water systems in EPA records. The largest local system is Greenville Water (Sc2310001), serving about 426,057 people from surface water.
Public-record figures, not a test of your tap. Not 100% accurate or guaranteed. Confirm with a water test, your utility or a qualified pro before you buy or act.
Greenville Water (Sc2310001) Estimate: untreated local water, not your tap · Low confidence
0.8 gpg (13 mg/L), soft
Greenville County: median of 688 results from 139 monitoring sites (streams and wells). Utilities may blend or treat water, so your tap can differ.
Source: Hard Water Map county data, samples through 2026
County estimates: Hard Water Map (hardwatermap.com), CC BY 4.0, derived from the USGS/EPA Water Quality Portal; file generated 2026-07-22. License
Public-record figures, not a test of your tap. Not 100% accurate or guaranteed. Confirm with a water test, your utility or a qualified pro before you buy or act.
At this hardness most homes don't need a softener. Confirm with a test strip if you see scale.
The 6 biggest of 8 community water systems on EPA records for this county. Service areas don't follow county lines; your water bill names your provider.
SC2310001 · serves about 426,057 people · Surface water
Lead 90th percentile: <DL (below the lab detection/reporting limit; reported as 0) (period starting 2022-01-01) Older result. Action level: 15 ppb (drops to 10 ppb on Nov 1, 2027).
SC2310005 · serves about 54,024 people · Surface water
Lead 90th percentile: <DL (below the lab detection/reporting limit; reported as 0) (period starting 2023-01-01) Older result. Action level: 15 ppb (drops to 10 ppb on Nov 1, 2027).
SC2320003 · serves about 40,006 people · Surface water
Lead 90th percentile: 7 ppb (period starting 2022-01-01) Older result. Action level: 15 ppb (drops to 10 ppb on Nov 1, 2027).
SC2320004 · serves about 3,255 people · Surface water
Lead 90th percentile: <DL (below the lab detection/reporting limit; reported as 0) (period starting 2019-01-01) Older result. Action level: 15 ppb (drops to 10 ppb on Nov 1, 2027).
SC2350023 · serves about 1,195 people · Groundwater
Lead 90th percentile: <DL (below the lab detection/reporting limit; reported as 0) (period starting 2021-01-01) Older result. Action level: 15 ppb (drops to 10 ppb on Nov 1, 2027).
SC2350010 · serves about 180 people · Groundwater
Lead 90th percentile: <DL (below the lab detection/reporting limit; reported as 0) (period starting 2021-01-01) Older result. Action level: 15 ppb (drops to 10 ppb on Nov 1, 2027).
Public-record figures, not a test of your tap. Not 100% accurate or guaranteed. Confirm with a water test, your utility or a qualified pro before you buy or act.
A PFAS detection is not a violation. Federal limits (4 ppt for PFOA and PFOS) apply to running annual averages, with compliance required by 2029. In May 2026 EPA proposed extending the PFOA/PFOS deadline to 2031 and removing other PFAS limits; not final as of 2026-10-21.
These are public records for whole systems. Your home's pipes, fixtures and any private well can change what you drink. A certified lab test or a hardness test strip gives you your own numbers. Then use our PFAS and lead filter selector to see which certifications to look for.
None of the 6 largest systems here have a health-based violation in EPA records since October 2021. Greenville Water (Sc2310001)'s most recent lead 90th percentile was below the lab detection limit (2022), below the 15 ppb action level. Public records can't guarantee what comes out of your tap, especially with older plumbing, so a home test is the surest check.
There's no published utility figure in our data, but untreated local stream and well samples in Greenville County have a median of about 0.8 grains per gallon (13 mg/L, soft). That's a low-confidence estimate of source water, not your tap, so test before you buy equipment.
None of the 3 sampled systems listed here detected PFAS above EPA's reporting levels in UCMR 5 testing.
Most homes are served by Greenville Water (Sc2310001) or one of the other systems listed on this page, but service areas don't follow county lines. Your water bill names your provider, and its annual Consumer Confidence Report has the full test results.
Data as of October 21, 2026. Figures are copied from public records and combined with our own calculations; they can be out of date or wrong. Tapped Out isn't affiliated with any utility or the EPA. Written and reviewed by the Tapped Out team. How we calculate · All sources.