San Diego Unified gave parents an update Thursday on district-wide water testing. 94 percent of the schools had no detectable levels of lead in their water. However, out of nearly 200 schools, three tested higher than the EPA’s acceptable level. While changes are complete at Emerson-Bandini Elementary and San Diego Cooperative Charter School 2, they are ongoing at Birney Elementary. Testing also found a few other campuses testing below the EPA level but above the detectable level.