San Diego is the only city in California seeking state reimbursement for testing the toxic lead levels in water at local schools, which has cost the city’s water agency more than $400,000. The city has done tests at 256 schools since early 2017, but must test another 45 schools over the next six weeks. State legislation requires water agencies to test every public school, regardless of whether the agency gets a request, by July 1. Significantly more schools in San Diego County have been tested than in any other county in California since the state requirement began.