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

#CountyRiverine Flood ScoreRatingAnn. Freq.Ann. Loss
1 Greenville County
96.0
High 2.79 / yr $104M
2 Richland County
94.6
High 3.82 / yr $74M
3 Spartanburg County
92.7
Medium 1.79 / yr $53M
4 Horry County
92.0
Medium 1.96 / yr $40M
5 Lexington County
90.6
Medium 1.43 / yr $47M
6 York County
90.2
Medium 1.14 / yr $51M
7 Charleston County
89.9
Medium 3.54 / yr $44M
8 Anderson County
88.1
Medium 1.54 / yr $33M
9 Aiken County
84.4
Medium 0.43 / yr $23M
10 Pickens County
84.0
Medium 0.96 / yr $23M
11 Florence County
82.6
Medium 0.79 / yr $18M
12 Lancaster County
81.3
Medium 0.68 / yr $21M
13 Oconee County
81.1
Medium 0.79 / yr $16M
14 Beaufort County
80.8
Medium 0.93 / yr $20M
15 Berkeley County
80.7
Medium 1.64 / yr $25M
16 Dorchester County
78.7
Medium 1.39 / yr $23M
17 Sumter County
76.3
Medium 0.43 / yr $15M
18 Georgetown County
76.1
Medium 1.07 / yr $12M
19 Orangeburg County
75.8
Medium 0.79 / yr $11M
20 Cherokee County
72.5
Low 0.39 / yr $12M
21 Laurens County
71.9
Low 0.93 / yr $11M
22 Greenwood County
66.2
Low 0.79 / yr $10M
23 Chesterfield County
65.8
Low 0.75 / yr $8M
24 Kershaw County
64.4
Low 0.46 / yr $10M
25 Darlington County
64.2
Low 0.61 / yr $8M
26 Newberry County
62.9
Low 0.25 / yr $8M
27 Dillon County
61.5
Low 0.18 / yr $6M
28 Williamsburg County
59.8
Low 0.36 / yr $6M
29 Colleton County
56.4
Low 0.61 / yr $5M
30 Marion County
55.5
Low 0.64 / yr $5M
31 Union County
53.4
Low 0.46 / yr $5M
32 Clarendon County
50.2
Low 0.46 / yr $4M
33 Saluda County
46.6
Low 0.18 / yr $4M
34 Fairfield County
42.6
Low 0.14 / yr $4M
35 Chester County
41.7
Low 0.39 / yr $4M
36 Marlboro County
41.0
Low 0.25 / yr $3M
37 Abbeville County
37.6
Low 0.50 / yr $3M
38 Barnwell County
35.0
Low 0.29 / yr $2M
39 Jasper County
34.8
Very Low 0.36 / yr $3M
40 Hampton County
34.7
Very Low 0.32 / yr $3M
41 Edgefield County
31.3
Very Low 0.14 / yr $3M
42 Bamberg County
20.6
Very Low 0.25 / yr $2M
43 Lee County
19.4
Very Low 0.11 / yr $2M
44 Calhoun County
19.4
Very Low 0.25 / yr $2M
45 McCormick County
16.8
Very Low 0.14 / yr $1M
46 Allendale County
14.5
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.

Other Hazards in South Carolina