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Counties → South Carolina

Dorchester County, South Carolina

SDWIS compliance plate

Sheet SC035 · Dorchester County 56 sys · 369 viol · #392/3254

VIOL-HIGH · HEALTH-MID · RANK-TOP · PHOTO-FINISH · PFAS-HIGH · SRC-GW · SYS-MID · BOOK-FULL

  • VIOL-HIGH 53.6% flagged
  • HEALTH-MID 37.7% health
  • RANK-TOP #392/3254
  • PHOTO-FINISH ±0.2 pp
  • PFAS-HIGH 100.0% detect
  • SRC-GW GW lead 68%
  • SYS-MID 56 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Beaufort County ( -0.2 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Dorchester County ranks #392 of 3,254 counties by people served, and #10 of 46 counties in South Carolina. See methodology · corpus placement.

Dorchester County standing, lower-flagged corpus third

Flagged-system rate 53.6% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 37.7% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 100.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #392 of 3,254 · #10 of 46 in South Carolina.

Flagged-rate neighbourhood around Dorchester County

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

0% 20% 40% 60% 80% 100% Horry · lowest Beaufort · near Charleston · near Lee · highest 26.4% 52.6% 53.3% 53.6% 54.1% 54.2% 100%

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

Water Systems

System Name Population Violations PFAS
Summerville Cpw (Sc1810003) 81,750 13 Detected
Dcwa Knightsville (1820001) 40,141 20 Detected
Dcws Ashley Phosphate (Sc1820008) 26,076 11 Detected
St George Town of (1810001) 2,300 18 -
Dcws/Clay Field Drive (Sc1850014) 1,648 0 -
Lieber Correctional Institute (1870050) 1,646 37 -
Dcws Southern Palms (Sc1850011) 1,494 7 -
Ridgeville Industrial Campus (Sc1830031) 1,000 0 -
Dcws Woodland High School (1870119) 1,000 0 -
Harleyville Town of (Sc1810002) 946 4 -
Dcws Edisto Tribal Council (1850010) 925 4 -
Dcwa Tranquil Acres (1820003) 858 1 -
Ridgeville Town of (Sc1810004) 710 33 -
Dorchester Co Career School (Sc1870109) 325 8 -
Dcws Reevesville (Sc1820002) 300 0 -
Dcwa Calomet Valley (1850009) 275 0 Detected
Harleyville Elem School (Sc1870101) 275 19 -
Heron's Walk Phase 1 (Sc1850017) 231 0 -
Resonac Graphite America Inc (Sc1830007) 230 10 -
Hm Southeast Cement Harleyville 1830001 180 8 -
Dcws Caleb Court (Sc1850015) 156 0 -
Dcws Conoflow (Sc1820007) 150 8 -
Crossroads BBQ (Sc1872003) 150 0 -
Quikrete Construction Material (1830005) 105 25 -
Dcws I-95 (Sc1870914) 102 53 -
Dcws Building (1870903) 100 7 -
Inn at Middleton Place (Sc1870400) 85 0 -
Middleton Place (Sc1870902) 85 30 -
Dcws Highway 17a (1820009) 50 2 -
Primo-Food Lion 1542 (Sc1880010) 50 0 -
Ronnies Station (1870200) 26 2 -
Enk 892 (Sc1870205) 26 1 -
Carter Fast Stop #3 (Sc1870212) 26 5 -
Scprt-Givhan's Park (Sc1870600) 26 3 -
Brosnan Forest #1 (Sc1870675) 26 9 -
Brosnan Forest #2 (1870676) 26 4 -
Francis Beidler Forest (Sc1870901) 26 2 -
Dorchester Shrine Club (Sc1870906) 26 0 -
Jrs Grocery (Sc1870912) 26 13 -
Country Corner 8 (Sc1870915) 26 8 -
SC Dps Northbound I95 Weigh Station 26 4 -
Gatherings LLC (Sc1874001) 26 0 -
Dcwa Knightsville-Ro Unit (1880001) 26 0 -
Primo-Walmart 0628 (1880008) 26 0 -
Primo-Walmart 1037 (Sc1880009) 26 0 -
Primo-Walmart 6174 (1880014) 26 0 -
Primo-Walmart 5279 (Sc1880016) 26 0 -
Primo-Lowes Foods 270 (Sc1880017) 26 0 -
Primo-Food Lion 2247 (Sc1880018) 26 0 -
Primo-Publix 0824 (Sc1880019) 26 0 -

Compare beyond South Carolina

Lower-flagged peers for Dorchester County

Cross-state counties nearest Dorchester County on flagged-system share (53.6%) and cumulative violation count (369). 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

Read our methodology · Check your water system - how this data is sourced, computed, and verified.

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.