Data and Statistics

New! Interactive Total Nitrogen Data

I/A system performance with respect to total nitrogen removal for single family homes is now available online. Data is presented in the form of box-whisker diagrams with an interactive charting system that allows you to look at performance data for individual technologies and individual towns. Click here to access the data.

Presentations given to town Boards of Health in 2011 pertaining to I/A system performance

For the most up-to-date I/A performance data, please use the above interactive tool. Please read this note about the Septitech data before perusing the presentations linked below.

Statistical Information

Updated January 22, 2013