Mold Outbreaks Force Class Relocations in Poway Unified School District
Mold has been discovered in classrooms at two schools within the Poway Unified School District. Black Mountain Middle School has reported mold in at least 14 classrooms, leading to reassignment of classes. Del Sur Elementary experienced a more severe mold…

San Diego, CA, August 24, 2026 —
POWAY, Calif. – Two schools within the Poway Unified School District are grappling with mold discoveries in their classrooms, leading to disruptions for students and staff. Officials have reported mold at Black Mountain Middle School and Del Sur Elementary School.
At Black Mountain Middle School, mold has been identified in at least 14 classrooms. The presence of mold has necessitated the reassignment of classes to accommodate the situation, though further details on the extent of the problem or the specific areas affected were not immediately available.
Del Sur Elementary School experienced a more significant mold outbreak, prompting a more extensive response. The severity of the mold issue at Del Sur Elementary forced the temporary relocation of the entire school population, including over 900 students and staff members. These individuals were moved to Stone Ranch Elementary School. The relocation is expected to last for approximately one month while cleanup operations are conducted at Del Sur Elementary.
The Poway Unified School District has not yet provided specific details regarding the cause of the mold outbreaks or the timeline for remediation efforts at either Black Mountain Middle School or Del Sur Elementary. The district’s response aims to ensure a safe and healthy learning environment for all students.
Story summarized from the original created by Natanya Faitelson on www.nbcsandiego.com, see more information here.
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