| 15 | Sanitary Landfill Site | Landfill, Public Facility | Riggs St, Chestnut Tree Rd, Towantic Hill Rd | Oct-76 | 130 |
| 17 | Morning Thorpe Subdivision | Subdivision | Rte 188, Hogsback Rd | Dec-76 | 154 |
| 135 | Ansonia-Derby Water Co. Lands | NRI | Great Hill Rd, Steep Hill Rd, Fountain Lake Res | Apr-84 | 1,426 |
| 149 | Camp Anseox | Commercial | Rte 63, Condon Rd, Christian St | Dec-84 | 55 |
| 157 | Elderly Housing Complex | Elderly Housing, Residential | Governor's Hill Rd, Town Farm Rd, Old Church Hwy | Apr-85 | 48 |
| 166 | Industrial Park Development | Industrial | Riggs St | Jun-86 | 130 |
| 210 | Lake Housatonic Study | Lake | Lake Housatonic | Nov-88 | 328 |
| 283 | Quaker Farms E.S. Outdoor Classroom | Environmental Education, NRI | Great Oak Rd,Govenor's Hill Rd, Hog Back Rd, Rte 188 | Jul-97 | 3 |
| 292 | Birmingham Utilities Property | NRI, Public Facility | Rte 188,Holbrook Rd, Rockhouse Hill Rd, Moosehill Rd | May-98 | 517 |
| 340 | Oxford Commons | Residential, Mobile Homes | Hurley Rd, Donovan Rd, Oxford Airport Rd | 6-Aug | 41 |