1. History of Boston’s water supply
2. How sustainable is this supply? (Some Calculations)
3. How much precipitation becomes runoff?
4. How much water gets lost to E-T?
5. How long does it take to fill the Quabbin Resevoir?
6. How much water do we use, compared to how much we have in resevrve?
Early Boston Water Supplies
i. Each house had its own water supply
ii. Prior to 1795 there were local wills and springs (Boston and Back Bay were nearly
iii. 1845▯ first westward expansion, Sudbury River tributary dammed to create Lake
Cochituate, aqueduct to Brookline Reservoir
o When water from Lake Cochituate flowed into the Frog Pond on
Boston Common in 1848, the dedication ceremony drew 100,000
iv. 1868▯ chestnut hill reservoir built as storage for water from lake cochituate
v. 1878▯ Sudbury river further dammed, diverted via Sudbury aqueduct to chestnut hill
vi. 1897▯ wachusett reservoir construction begins, Nashua river dammed, chestnut hill
reservoir is the hub of the distribution system
vii. 1926▯ construction begins on tunnels and dams to bring water from the swift river
valley to Boston
i. Disinfect reservoir water with Ozone to kill pathogens
ii. Add fluoride to reduce cavities
iii. Adjust chemistry to reduce corrosion of lead and copper in home plumbing
iv. Add mono-chloramine, a m