The state’s biggest drinking water provider has nixed a groundbreaking request to draw an additional 20 million gallons of water per day out of the Quabbin Reservoir in a nod to the outrage it prompted within central Massachusetts communities.

The Massachusetts Water Resources Authority, which serves 61 municipalities mostly in and around Greater Boston, had pursued its plan — by far the largest withdrawal request in its history — in order to meet growing demand from new communities like Weymouth and Wayland looking to join the system.

But in addition to the size of its proposal, which totaled 10 percent of average annual demand, the agency faced fierce backlash for the process it deployed to win approval from state regulators at the Water Resources Commission. The proposal added fuel to an escalating feud with the small rural towns surrounding the Quabbin and their representatives on Beacon Hill.

Water transfers like the one the MWRA pitched here are governed by the 40-year-old Interbasin Transfer Act, in which state officials ensure that the move is environmentally sound and meets demonstrated need for both what’s known as the donor basin, the resource sending water elsewhere, and the receiving basin, or the area taking in more water.

Yet for the first time in state history, the MWRA sought the greenlight from state regulators on its donor basin proposal separately, before any receiving basin requests that may come in the future in an effort to streamline the process and cut red tape. If advanced, the MWRA could have had donor basin approvals in hand by the time new communities attempt to receive the water and join the system.

“It is clear that the use of that regulatory option added to confusion and concern, rather than allaying it,” Stephen Estes-Smargiassi, MWRA’s interim executive director, wrote in a letter to the Water Resources Commission on Thursday.

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