[4] In 1932, under Chairman Charles Goodwin, the MDC was forced to slow its land acquisition as a result of the poor bond market during the Great Depression.

Flooding began late that fall, though it took 8 years for the reservoir to fill to capacity when water crested the Saville spillway in 1948.

[4] Construction of the first water pollution control facility on the Connecticut River was completed in 1938, in Hartford's South Meadows region.

In 2017 the MDC began work on The South Hartford Conveyance and Storage Tunnel, the largest project in the District's history.

The 18 ft diameter tunnel will extend four miles at a depth of over 200 ft and will carry stormwater during significant rain events; this project is the cornerstone of a larger sewer-stormwater separation project aimed at improving water quality in Wethersfield Cove, the Connecticut River, and Long Island Sound.

[6] The Barkhamsted Reservoir was commissioned in 1940 after the completion of the Saville Dam on the East Branch of the Farmington River at a cost of $10 million.

[17] In 2011 CEO Charles Sheehan stated that Metropolitan District Officers operate both in uniform and in plain clothes, and that they maintain order at the MDC's corporate headquarters in addition to the field facilities.

[20] In 2016 the MDC Board voted to discontinue the Niagara discount as part of efforts to restore public trust and appease the State Legislature.

[22] In 2008 MDC Chairman William A. DiBella was ordered by the SEC to pay $795,000 in restitution for his role in an investment scheme involving former State Treasurer Paul J. Silvester and Thayer Capital Partners.

[26] Mark Pappa, a fellow MDC Commissioner, stated that “If this was a publicly traded company this conversation wouldn’t even happen because there’s no question Mr. DiBella would not be sitting here.” [27][28] In August 2022, the MDC announced that it was investigating $80,000 billed for legal services provided earlier that year by James Sandler, of Sandler & Mara PC.

[30] As part of the controversy, including the lengthy delays in initiating the investigation and DiBella's limited cooperation, a State Legislative committee held open hearings to reconsider portions of MDC's charter and the agency's audit requirements.