Maryland records
Common Watersnake in Maryland
HarmlessNerodia sipedon

Yes. The Common Watersnake has been recorded in 23 Maryland counties. It is non-venomous (harmless). Heavy banded or blotched body, round pupils, and a narrow head — unlike the cottonmouth's broad, blocky head.
Maryland counties with Common Watersnake records
23 listedSee the full Common Watersnake profile or all snakes in Maryland.