PlainWater

Calhoun County, South Carolina

SDWIS compliance plate

Sheet SC017 · Calhoun County 11 sys · 253 viol · #2685/3254

VIOL-SEVERE · HEALTH-LOW · RANK-BOTTOM · PHOTO-FINISH · PFAS-NONE · SRC-GW · SYS-SMALL · BOOK-MOST

  • VIOL-SEVERE 90.9% flagged
  • HEALTH-LOW 18.2% health
  • RANK-BOTTOM #2685/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-NONE No UCMR5 set
  • SRC-GW GW lead 100%
  • SYS-SMALL 11 systems
  • BOOK-MOST 6/7 fields

Nearest flagged-rate peer: Laurens County (+ 0 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Calhoun County ranks #2,685 of 3,254 counties by people served, and #44 of 46 counties in South Carolina. See methodology · corpus placement.

Calhoun County standing, lower-flagged corpus third

Flagged-system rate 90.9% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 18.2% is health-based share in the middle third (≤ 24.5%) . No UCMR5 tests in this extract for Calhoun County . Population served ranks #2,685 of 3,254 · #44 of 46 in South Carolina.

Flagged-rate neighbourhood around Calhoun County

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

0% 20% 40% 60% 80% 100% Horry · lowest Sumter · near Calhoun · this county Lee · highest 26.4% 87.5% 87.5% 88.9% 90.9% 90.9% 100%

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

Water Systems

Compare beyond South Carolina

Lower-flagged peers for Calhoun County

Cross-state counties nearest Calhoun County on flagged-system share (90.9%) and cumulative violation count (253). 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.