Mr. Owens got a 63 out of 100, putting the Plattsburgh congressman in last place among Dems but still higher than any Republican in the House delegation.
No other Democrat was even close, except retiring Rep. Maurice Hinchey, who missed votes because of an illness.
Mr. Owens's ranking was downgraded because of his support for drilling measures, including the Keystone XL pipeline, and his opposition to certain boiler regulations.
The ranking, which puts Mr. Owens about halfway between the Ds and the Rs in the delegation, might not be the worst news for Mr. Owens, whose campaign will make every effort to shore up his moderate-to-conservative bona fides in a heavily Republican district.
"Congressman Owens' ranking this year reflects his balanced approach to protecting the environment while working to create jobs and grow the economy," spokesman Sean Magers said in an electronic message. "The votes listed by the LCV detail Owens' work to protect the region's tourism and forest industry, promote the construction of the Keystone pipeline, expand energy exploration and reduce costly and unnecessary regulations."