The city, like many municipalities, is pursuing a Green Communities designation. Michael Rosenburg, superintendent of public buildings and lead in the North Adams Energy Efficiency Initiative updated the City Council on Tuesday on the criteria and the city's progress so far.

The process was begun some years ago, which residents may not be aware of, said Rosenburg.

"Not many people know this is going on," he said. "I've given presentations before and people have been surprised we're doing this but it's been going on behind the scenes."

The most notable green effort was renovation of the library, which included a photovoltaic system and geothermal pump. It became the first public library certified as LEED.

More recently, the high school and the Massachusetts Museum of Contemporary Art have been awarded grants for photovoltaic systems; on the smaller side, some lights and trash cans are solar powered.

The city is also looking at uses for LED lights and a solar array at the landfill, and ways to reduce energy usage for its 45 buildings and 93 vehicles.

Rosenburg said his group met with National Grid and Berkshire Gas in January to discuss ways the city could find savings. National Grid is offering three free comprehensive energy audits that will be done at Drury High School, Brayton Elementary School and the water filtration facility. The newer schools were selected because a feasibility study will look at all the school buildings, the assumption being that significant work may be required to the older buildings.

A Green Communities Act requires the municipality to meet seven criteria, including setting an energy-use baseline from which to determine a reduction of 20 percent within five years. Rosenburg said 2009 — the worst year so far in energy use and the best documented — will likely set the baseline.