PORTLAND — State officials hope the state’s drug take-back program will exceed last year’s one-day event, in which nearly 4 tons of unwanted and outdated drugs were turned in.

Maine State Police say 128 law enforcement agencies are participating in today’s drug collection efforts with more than 150 sites set up statewide where people can take their unwanted drugs.

One goal is to properly dispose of prescription drugs, which are sometimes flushed away to pollute streams and rivers or thrown out with the garbage, where they end up in landfills.

Another goal is to keep dangerous drugs out of the wrong hands.

Officials say Mainers discarded 7,820 pounds of prescriptions during the first national drug take-back day last September. Maine ranked first in the program on a per-capita basis.