The federal government says toxic releases into the environment increased 1 percent in Hawai'i during 2007 from the year before.

The U.S. Environmental Protection Agency said yesterday that Hawaiian Electric Co.'s Kahe Generating Station near Nanakuli was the biggest source of the state's toxic chemicals.

The plant released more than 820,000 pounds.

The Navy's Pearl Harbor base was the next biggest emitter. It released more than 373,000 pounds.

The EPA says electric power generating facilities accounted for 67 percent of toxic chemical releases in Hawai'i.

They also were responsible for 83 percent of toxic releases into the air.

The data cover toxic chemicals discharged into the air, water, land and underground, and the amount transferred offsite for disposal.