Lower Longwood Reservoir
- location: Longwood
- status: uncertain
- category: reservoir
Completed in 1829 with a stated capacity of 20,299,134 gallons.
The neighbouring Upper Longwood Reservoir was completed 1848 with a capacity of 50,000,000 gallons after which the older reservoir became a service reservoir.
A further compensation reservoir is situated to the northeast and this was built to supply local industry.
The reservoir was converted to a smaller covered reservoir by the late 1970s and it is uncertain if it remains in use.