Appoximately one-third of Middlebury's area is sewered, including the sites of all major corporate and commercial developments along Routes 63, 64, and 188.

 

The remainder of the Town is served by on site private septic systems. Sewage and septic wastes are treated at a secondary level treatment facility located in neighboring Naugatuck. Middlebury currently contributes approximately 10 percent of the facility's net operating budget.

 

The town's Water Pollution Control Authority governs and maintains the sewage system, including setting rates for users.