The city announced Thursday that owners of more than 86 percent of Philadelphia's large commercial buildings complied with a new law to report energy usage, and their average Energy Star score came in at 64, above the national average of 50.

Energy usage and water reports from 2012 were filed for 1,750 of about 1,900 eligible buildings larger than 50,000 square feet, representing 250 million square feet or 20 percent of all building space in the city.

The city says the benchmarking law will give building owners, managers and tenants useful information for taking action to reduce their energy and water costs.

The deadline for reporting 2013 energy and water usage is June 30. For more information about the benchmarking law: