Catalyzes hydrolytic cleavage of carbon-halogen bonds in halogenated aliphatic compounds, leading to the formation of the corresponding primary alcohols, halide ions and protons. Has a broad substrate specificity, which includes mono- and di-chlorinated and brominated linear alkanes (up to at least C4). Shows good activity with the priority pollutant 1,2-dichloroethane. 1-haloalkane + H2O = a halide anion + a primary alcohol + H(+) Optimum pH is 8. Optimum temperature is 50 degrees Celsius. Monomer. Belongs to the haloalkane dehalogenase family. Type 1 subfamily.