Del Sur Elementary School has pushed back the start of its 2026-2027 school year after crews discovered moisture-related concerns in several classrooms, with families now told to expect classes to begin Aug. 18 or 19 instead of the original date. The delay also applies to the campus's ESS and preschool programs, leaving working parents in the North County community scrambling for backup childcare with just days' notice.
According to a school letter cited by FOX 5 San Diego, Del Sur Elementary began remediation work immediately in affected classrooms after discovering the issues on Aug. 1. An initial evaluation by Air America Testing found nine classrooms needing additional remediation, one classroom that had to be retested, and five classrooms already ready to be reoccupied. Belfor Property Restoration is handling the removal and remediation of the moisture-related issues, per the same report.
Poway Unified School District says addressing the situation as quickly and responsibly as possible is its priority, and the district has created an FAQ page to keep families informed as work continues. Remediation teams are expected to complete microbial cleaning of every classroom on campus, clean ductwork serving the affected areas, and reevaluate the spaces on Saturday, with retesting results expected the following day. Air America Testing will then certify whether the issues have been resolved. If those results come back positive, school staff will get an additional day to set up classrooms before students arrive.
A Campus With a History of Moisture Problems
This is not the first time Del Sur Elementary has dealt with water intrusion. In August 2023, the campus experienced a mold issue caused by water leaking through an exterior window, which district crews resolved by removing sections of wall, cleaning the area thoroughly, and resealing the window, according to inewsource.
The following year, more than 300 community members signed an online petition demanding comprehensive mold testing and removal at the school after parents and teachers reported wet spots, mildew odors and possible health symptoms, the outlet's reporting shows. A district spokesperson confirmed that mold was present in six of 17 spaces tested by Air America in 2024, after a Del Sur Elementary teacher had already conducted independent mold testing in a classroom that year.
Parent Kristen Montan told inewsource that mold at Del Sur Elementary left her daughter with extensive health issues, including headaches, stomach aches, insomnia and skin problems. Montan said a holistic doctor found extremely high levels of mold in her daughter's body. The petition that circulated in 2024 was initiated by a parent who suspected her child's health issues stemmed from mold exposure at the school, per inewsource's account.
State Guidance Offers No Firm Health Threshold
California's public health guidance complicates how districts are expected to respond to reports like these. State health authorities advise school districts and facility managers against relying solely on airborne mold spore testing to evaluate hazards, emphasizing instead that visible dampness, water damage and mold odors must be corrected immediately by fixing leaks and removing wet materials, according to the California Department of Education. State guidance also notes that clear health-based exposure thresholds for indoor airborne mold spores have not been established.
Public health researchers note that California public schools lack comprehensive statutory indoor air quality or temperature standards, leaving local boards to rely on voluntary frameworks such as the EPA's Tools for Schools program, according to Cal State East Bay. That regulatory gap leaves individual districts like Poway Unified to set their own remediation standards and communication practices when moisture issues surface.
District Facing Broader Fiscal Pressures
The remediation effort comes as Poway Unified navigates separate financial strain. In March, the district's Board of Education authorized early retirement incentives through PARS and approved layoff resolutions for certificated and classified personnel ahead of the 2026-2027 school year, as Hoodline previously reported, with district leadership citing projected budget deficits.
Del Sur Elementary, which opened in August 2008, enrolled 829 students in kindergarten through fifth grade during the 2025-2026 academic year, per the California Department of Education. The school serves as the primary public elementary campus for the Del Sur master-planned community, developed starting in 2006 near Black Mountain Open Space Park and designed for roughly 2,500 families.
Dr. Ben Churchill has led Poway Unified since December 2024, after a nationwide search following the school board's termination of former superintendent Marian Phelps in April 2024. Under state law, districts must provide 180 instructional days per school year, though emergency delays can be addressed through Form J-13A requests that allow schools to maintain full funding without extending the calendar.
