The following is an interactive map that is fairly complex with a lot of information. The six red dots are the six Alewife CSOs that discharge untreated sewage pollution into the Alewife Brook.
“1% Annual Chance of Flood Hazard” is a FEMA designation for the “100-year” flood area. That means that there is a 1% chance of flooding in any year, and a 1 in 4 chance of flooding during the duration of a 30-year mortgage. It is based on previous rainfall and flooding data and does not take climate change into account which will increase the risk.
Interactive CSOs Map with FEMA Flood Zones
Click on the “+” and “-” in the lower left corner to zoom in and out of the map. There is a legend to the right of the “-” symbol. The layers are also clickable and can be turned on and off.
I am 77, grew up in Somerville, left in my twenties, Alewife Brook Pkway, had an area Spot Pond large body of water with many a weeping willow, always alot of water it was a great fishing locations, with homes were built alot of acreage was filled in and I wonder if this had led to the flooding. My maiden name was Rockwood, I graduated Classof 64