Establishes statewide minimum standards for private wells and requires the Department of Environmental Protection to set drinking water quality standards specifying contaminants, acceptable levels, and testing frequency. Mandates testing for all listed contaminants for new wells before service and for all private wells before residential property transfer, and authorizes local Boards of Health to enforce and adopt stricter standards.

Requires inspection of a private well at or within two years before transfer of title to the private well facility and delivery of the inspection report to the buyer, exempts transactions including mortgages, refinancings, intra-family ownership changes, and fiduciary appointments, and specifies that noncompliance does not invalidate a transfer. Expands homeowner assistance by authorizing the Department of Environmental Protection to set requirements for loan guarantees and interest subsidies and to subcontract administration for eligible private-well remediation projects determined by a Board of Health or the Department, including treatment to meet public drinking water standards or remediation of septic systems out of compliance with state septic regulations.

Authorizes up to $1,000,000,000 in general obligation bonds, payable from the General Fund and maturing no later than June 30, 2053. Establishes the Water Infrastructure Improvement Fund in the state treasury, administered by the Board of Trustees of the Clean Water Trust with the State Treasurer as custodian, with monies under the Board's control and not subject to appropriation, to finance municipal drinking water maintenance and improvements, lead service line replacement, and wastewater and stormwater infrastructure projects.

Allocates municipal grants by formula weighted by road miles (58.33%), population (20.83%), and employment (20.83%) relative to a defined base allocation; requires recipient local governmental units to maintain a department-approved asset management plan, implement a department-approved full cost pricing program, and submit an application. Directs the Trust to issue preliminary annual funding notices by April 1 and to reimburse certified eligible project costs within 30 days, and permits municipalities to appropriate up to the amounts provided.

The bill authorizes a capital outlay program aimed at upgrading and expanding Massachusetts' water infrastructure. It allocates $78.5 million for the Commonwealth Sewer Rate Relief Fund and $138 million for the Massachusetts Clean Water Trust. The bill also dedicates $2 billion to expanding the Massachusetts Water Resources Authority's capacity, with an emphasis on improving drinking water quality and increasing housing capacity. In addition, $375 million is designated for the HousingWorks infrastructure program to support housing projects and ensure compliance with zoning requirements.

In addition to funding allocations, the bill includes provisions for research, rehabilitation, and community impact assessments concerning water resources. It establishes an Interbasin Transfer Review Commission to review and possibly amend water transfer laws in support of housing development, while ensuring environmental protections. The bill also proposes the creation of several commissions and advisory committees aimed at addressing funding gaps and improving efficiency in water infrastructure. In addition, a grant program supporting workforce training, employment opportunities, and promoting diversity in hiring within the sector is established by the bill.

Establishes the Quabbin Host Community Trust Fund, administered by the Secretary of Energy and Environmental Affairs, funded by an annual Massachusetts Water Resources Authority deposit of $35,000,000 indexed to inflation, and requires at least 90% of the fund be spent each year, including no less than 70% for municipal operations and capital improvements (including debt service) in watershed communities, no more than 25% for non-profit and cultural organizations serving those communities and the Connecticut and Chicopee River Basin communities, and no more than 5% for projects related to conduits, pipes, and hydrants.

Amends payments in lieu of taxes to base payments on total acreage with a minimum of $50,000 annually and a floor not below the prior fiscal year's Metropolitan District Commission payment. Revises Massachusetts Water Resources Authority board composition to require three members from Quabbin Reservoir watershed communities-one each from Franklin, Hampshire, and Worcester counties-representing land and water resources protection and host community interests, and imposes a 12-year term limit on board service, except for the Secretary of the Executive Office of Environmental Affairs. Requires the Authority to complete a Water System Expansion Evaluation for the Westfield, Chicopee, Connecticut, and Millers River Basin communities by December 31, 20256, and bars approval of any interbasin transfer of water from the Quabbin Reservoir until completion; Section 1 takes effect January 1, 2026.

This bill enables municipalities and specified districts or authorities to levy fees to mitigate environmental impacts caused by water withdrawals, wastewater discharges, and stormwater systems. The collected fees are allocated for initiatives such as local water recharge, minimizing water system losses, expanding treatment facilities for stormwater and wastewater, promoting water reuse, and enhancing water conservation. Additionally, the bill supports projects like water reuse, sewer infiltration removal, water conservation, retrofitting of buildings and parking lots, dam removals, aquatic habitat enhancements, and land acquisition for water supply protection and habitat purposes. Adopting local entities must appoint an official or board responsible for the assessment, collection, and management of these fees, which are to be deposited into separate "Sustainable Water Resource Funds" dedicated to drinking water, wastewater, or stormwater projects. 

Creates the Quabbin Host Community Trust Fund, administered by the Secretary of Energy and Environmental Affairs to support municipal services, public safety, and development needs of Quabbin Reservoir watershed communities, and funded by the Massachusetts Water Resources Authority with $35,000,000 annually, indexed to inflation, effective January 1, 2026.

Mandates that at least 90% of the Fund be spent each year, with no less than 70% for municipal operations and capital improvements (including debt service), up to 25% for nonprofit and cultural organizations serving the watershed and the Connecticut and Chicopee River Basin communities, and no more than 5% for specified water system projects.

Revises payments in lieu of taxes by requiring payments on all acreage held in each community, setting a minimum of $50,000 annually, and guaranteeing no city or town receives less than the prior fiscal year payment from the Metropolitan District Commission.

Restructures the Massachusetts Water Resources Authority by replacing a single Connecticut River Basin seat with three directors residing in Quabbin Reservoir watershed communities-one each from Franklin, Hampshire, and Worcester counties-representing land and water resources protection and host community interests; imposes a 12-year board service limit except for the Secretary of Energy and Environmental Affairs; and requires the Authority to complete by December 31, 2026 a Water System Expansion Evaluation for specified river basin communities while barring approval of any interbasin transfer of water from the Quabbin Reservoir until that evaluation is completed.

This bill authorizes a capital outlay program aimed at upgrading and expanding Massachusetts' water infrastructure. It allocates $78.5 million for the Commonwealth Sewer Rate Relief Fund and $138 million for the Massachusetts Clean Water Trust. The bill also dedicates $2 billion to expanding the Massachusetts Water Resources Authority's capacity, with an emphasis on improving drinking water quality and increasing housing capacity. In addition, $375 million is designated for the HousingWorks infrastructure program to support housing projects and ensure compliance with zoning requirements.

In addition to funding allocations, the bill includes provisions for research, rehabilitation, and community impact assessments concerning water resources. It establishes an Interbasin Transfer Review Commission to review and possibly amend water transfer laws in support of housing development, while ensuring environmental protections. The bill also proposes the creation of several commissions and advisory committees aimed at addressing funding gaps and improving efficiency in water infrastructure. In addition, a grant program supporting workforce training, employment opportunities, and promoting diversity in hiring within the sector is established by the bill.

Requires the Department of Environmental Protection to promulgate minimum standards for private wells, including drinking water quality standards that identify contaminants, acceptable levels, and testing frequency; mandates testing for all listed contaminants for new wells before service and for existing wells before residential property transfers; and authorizes Local Boards of Health to enforce and adopt stricter standards.

Requires inspection of a private well at or within two years before a transfer of title to a private well facility, with the inspection report provided to the buyer; exempts mortgages, refinancings, intra-owner changes, spousal transfers, and fiduciary appointments; and clarifies that noncompliance does not void the transfer.

Expands an existing loan program to assist homeowners in installing treatment systems so private wells meet public drinking water standards; authorizes the Department to set loan guarantee and interest subsidy requirements and to subcontract administration; permits eligibility determinations by Local Boards of Health or the Department; and defines "private well" and "private well facility."

This bill enables municipalities and specified districts or authorities to levy fees to mitigate environmental impacts caused by water withdrawals, wastewater discharges, and stormwater systems. The collected fees are allocated for initiatives such as local water recharge, minimizing water system losses, expanding treatment facilities for stormwater and wastewater, promoting water reuse, and enhancing water conservation. Additionally, the bill supports projects like water reuse, sewer infiltration removal, water conservation, retrofitting of buildings and parking lots, dam removals, aquatic habitat enhancements, and land acquisition for water supply protection and habitat purposes. Adopting local entities must appoint an official or board responsible for the assessment, collection, and management of these fees, which are to be deposited into separate "Sustainable Water Resource Funds" dedicated to drinking water, wastewater, or stormwater projects.