An unprecedented and fledgling statewide effort to shore up hundreds of struggling drinking water systems could face intense pressure from the novel coronavirus pandemic as the program is rolled out in coming months.

For almost a year now, the California Water Resources Control Board has been working to craft the program, and on Tuesday it approved a policy designed to guide the spending of $1.3 billion over 10 years to save some 300 water systems that are failing or at-risk of failing.