Requires posting of signs warning of presence of, and potential danger caused by, duckweed on water bodies in public parks.

New Jersey Assembly Bill A2498 requires state parks, counties, and municipalities to annually inspect public park water bodies for duckweed (a small aquatic plant that appears as a thick, solid mat on water). If duckweed is found, they must post clear warning signs stating it poses a danger because it can't support weight. The bill also mandates the Department of Environmental Protection to create educational materials about identifying duckweed and provide standardized warning signs to all counties and municipalities. This applies to all public parks in the state and aims to prevent accidents from people stepping on duckweed.