; (4) rural communities served by individual, onsite domestic wells that have documented dry well conditions or contaminated well conditions; and (5) public water systems that desire to consolidate with each other, or with a larger urban system, to increase economies-of-scale to reduce cost of service, and increase the level and quality of water service delivery. (e) Maximum amount The amount of a grant provided under this section may be used to fund— (1) not more than 100 percent of costs for activities, including— (A) technical assistance and other costs associated with application for assistance through the Disadvantaged Community Drinking Water Assistance Program; (B) initial operating costs incurred to start up, test, and place into service project facilities and components; and (C) capital costs of construction or components to ensure such facilities and components are properly operational; and (2) not more than 25 percent of costs for assistance with operation and maintenance costs incurred subsequent to placing the facilities or components into service to ensure service remains efficient and effective. (f) Operation and Maintenance Not more than 25 percent of funds made available in any fiscal year for grants under this section shall be used for operations and maintenance costs. States may use a State circuit riding operations assistance team to identify applicants approved for operations and maintenance assistance. (g) Authorization of appropriations There is authorized to be appropriated to the Secretary of the Interior to carry out this section $20,000,000 for each of fiscal years 2021 through 2025, to remain available until expended.