| Attribute | Quabbin Reservoir |
| Year Built | 1939 |
| Dam Length | 2,640 feet |
| Volume Capacity | 412 billion gallons |
| Surface Area | 39.4 square miles |
|
Watershed
Area |
187 square miles |
| Shoreline | 118 miles |
| Length | 18 miles |
| Maximum Width | 3 miles |
| Mean Width | 1.5 miles |
| Maximum Depth | 151 feet |
| Mean Depth | 45 feet |
| Normal Operation Range | 520-530 feet |
| Intake Depth | 442 feet |
| Overflow Elevation | 530 feet |
| % DCR/DWSP Protected Land | 57% |
| % Other Protected Land | 18% |
| Total % Protected Land | 75% |