Riverine Flood Risk in South Carolina
All South Carolina counties ranked by FEMA National Risk Index riverine flood score
Riverine Flood risk — rivers and streams overflowing their banks after heavy rain or snowmelt — is rated for 46 of 46 South Carolina counties in FEMA's National Risk Index. Greenville County carries the state's highest riverine flood score at 96.0, with $104M in expected annual riverine flood losses.
2 South Carolina counties are rated High or Very High for riverine flood, and expected annual losses from riverine flood total roughly $785M statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Riverine Flood
| # | County | Riverine Flood Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | Greenville County | High | 2.79 / yr | $104M | |
| 2 | Richland County | High | 3.82 / yr | $74M | |
| 3 | Spartanburg County | Medium | 1.79 / yr | $53M | |
| 4 | Horry County | Medium | 1.96 / yr | $40M | |
| 5 | Lexington County | Medium | 1.43 / yr | $47M | |
| 6 | York County | Medium | 1.14 / yr | $51M | |
| 7 | Charleston County | Medium | 3.54 / yr | $44M | |
| 8 | Anderson County | Medium | 1.54 / yr | $33M | |
| 9 | Aiken County | Medium | 0.43 / yr | $23M | |
| 10 | Pickens County | Medium | 0.96 / yr | $23M | |
| 11 | Florence County | Medium | 0.79 / yr | $18M | |
| 12 | Lancaster County | Medium | 0.68 / yr | $21M | |
| 13 | Oconee County | Medium | 0.79 / yr | $16M | |
| 14 | Beaufort County | Medium | 0.93 / yr | $20M | |
| 15 | Berkeley County | Medium | 1.64 / yr | $25M | |
| 16 | Dorchester County | Medium | 1.39 / yr | $23M | |
| 17 | Sumter County | Medium | 0.43 / yr | $15M | |
| 18 | Georgetown County | Medium | 1.07 / yr | $12M | |
| 19 | Orangeburg County | Medium | 0.79 / yr | $11M | |
| 20 | Cherokee County | Low | 0.39 / yr | $12M | |
| 21 | Laurens County | Low | 0.93 / yr | $11M | |
| 22 | Greenwood County | Low | 0.79 / yr | $10M | |
| 23 | Chesterfield County | Low | 0.75 / yr | $8M | |
| 24 | Kershaw County | Low | 0.46 / yr | $10M | |
| 25 | Darlington County | Low | 0.61 / yr | $8M | |
| 26 | Newberry County | Low | 0.25 / yr | $8M | |
| 27 | Dillon County | Low | 0.18 / yr | $6M | |
| 28 | Williamsburg County | Low | 0.36 / yr | $6M | |
| 29 | Colleton County | Low | 0.61 / yr | $5M | |
| 30 | Marion County | Low | 0.64 / yr | $5M | |
| 31 | Union County | Low | 0.46 / yr | $5M | |
| 32 | Clarendon County | Low | 0.46 / yr | $4M | |
| 33 | Saluda County | Low | 0.18 / yr | $4M | |
| 34 | Fairfield County | Low | 0.14 / yr | $4M | |
| 35 | Chester County | Low | 0.39 / yr | $4M | |
| 36 | Marlboro County | Low | 0.25 / yr | $3M | |
| 37 | Abbeville County | Low | 0.50 / yr | $3M | |
| 38 | Barnwell County | Low | 0.29 / yr | $2M | |
| 39 | Jasper County | Very Low | 0.36 / yr | $3M | |
| 40 | Hampton County | Very Low | 0.32 / yr | $3M | |
| 41 | Edgefield County | Very Low | 0.14 / yr | $3M | |
| 42 | Bamberg County | Very Low | 0.25 / yr | $2M | |
| 43 | Lee County | Very Low | 0.11 / yr | $2M | |
| 44 | Calhoun County | Very Low | 0.25 / yr | $2M | |
| 45 | McCormick County | Very Low | 0.14 / yr | $1M | |
| 46 | Allendale County | Very Low | 0.14 / yr | $1M |
46 South Carolina counties with measurable riverine flood risk. See the national riverine flood ranking or all South Carolina counties by overall risk.
Frequently Asked Questions
Which South Carolina county has the highest riverine flood risk?
Greenville County has the highest FEMA riverine flood risk score in South Carolina at 96.0 (High), with $104M in expected annual losses and about 2.79 events per year.
How many South Carolina counties face significant riverine flood risk?
46 South Carolina counties record measurable riverine flood risk in FEMA's National Risk Index; 2 of them are rated High or Very High.