A third school in the San Diego Unified School District has higher than recommended amounts of lead in the school’s drinking water, according to the most recent testing results reviewed by NBC 7 Investigates.  Tuesday, test results for the Montezuma Child Development Center show one water sample had 53 parts per billion of lead in it.  The EPA requires action to be taken if the amount of lead in the water is greater than 15 parts per billion.  The sample was taken from the school’s Room 1 outdoor drinking fountain last month.