Under the Pollution Prevention/Good Housekeeping portion of the general permit (page 31), towns and institutions must develop a retrofit program to disconnect existing Directly Connected Impervious Area (DCIA) by 1% per year (starting in 2020). Previous disconnections going back to 2012 can be counted toward this disconnection requirement. The chart below should help keep track of these disconnects (page 32). The chart can also be downloaded here.
