PlainWater

Barnwell County, South Carolina

SDWIS compliance plate

Sheet SC011 · Barnwell County 19 sys · 167 viol · #2236/3254

VIOL-HIGH · HEALTH-LOW · RANK-LOWER · BELOW-PEER · PFAS-CLEAN · SRC-GW · SYS-SMALL · BOOK-FULL

  • VIOL-HIGH 47.4% flagged
  • HEALTH-LOW 10.8% health
  • RANK-LOWER #2236/3254
  • BELOW-PEER 5.3 pp cleaner
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 100%
  • SYS-SMALL 19 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Chester County (+ 5.3 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Barnwell County ranks #2,236 of 3,254 counties by people served, and #39 of 46 counties in South Carolina. See methodology · corpus placement.

Barnwell County standing, lower-flagged corpus third

Flagged-system rate 47.4% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 10.8% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #2,236 of 3,254 · #39 of 46 in South Carolina.

Flagged-rate neighbourhood around Barnwell County

Lowest/highest poles plus in-state counties nearest Barnwell County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.

0% 20% 40% 60% 80% 100% Horry · lowest Chester · near Dorchester · near Lee · highest 26.4% 47.4% 52.6% 53.3% 53.6% 54.1% 100%

Source: EPA SDWIS (county aggregates) As of 2026-05-15

Water Systems

Compare beyond South Carolina

Lower-flagged peers for Barnwell County

Cross-state counties nearest Barnwell County on flagged-system share (47.4%) and cumulative violation count (167). In-state neighbours stay on the compliance plate above.

Similar flagged-system rate

Nearest cross-state counties by % of SDWIS systems with at least one violation on record.

4 peers

Similar violation load

Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).

4 peers
Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.