Why Del Sur Elementary's School Year Didn't Start on Time: What Really Happened
For most families in Poway Unified, the first day of school is a familiar routine, backpacks packed, first-day photos taken, and summer officially over. But this year, Del Sur Elementary was different. While every other Poway Unified elementary school welcomed students back, Del Sur's campus remained closed. What began as what many hoped would be a short delay has now become a temporary relocation of the entire school community to nearby Stone Ranch Elementary.
For many families, the situation has raised more questions than answers. Why wasn't the issue discovered sooner? Why can't students simply use the unaffected classrooms? Is this a one-time maintenance issue, or part of a bigger problem? Here's everything we know.
How We Got Here
During routine summer preparations, Poway Unified discovered moisture issues in several classrooms at Del Sur Elementary. Initially, district officials believed the affected areas could be remediated quickly enough for students to start school on schedule. Contractors immediately began cleaning, drying affected spaces, and conducting environmental testing.
However, independent environmental testing completed just before school was due to begin revealed that the issue involved more classrooms than originally expected. Testing identified several rooms with elevated or moderately elevated levels of indoor-originating mold spores. Rather than rushing students back onto campus, the district delayed the start of school while additional remediation and testing took place. Over the following week, restoration crews worked around the clock cleaning classrooms, HVAC systems, carpets and common areas while environmental specialists continued sampling the building.
This Isn't the First Time
For many parents, this wasn't simply an isolated maintenance issue. Back in 2023, moisture intrusion around a classroom window resulted in mold remediation after water entered the building during storms. Then in 2024, concerns resurfaced. Parents reported musty smells, damp carpets after rain, moisture around vents and recurring water issues throughout parts of the campus.
Independent testing that year detected mold in several locations. More than 300 parents and community members signed a petition asking the district for greater transparency, more extensive independent testing, and permanent solutions instead of temporary fixes. At the time, Poway Unified completed additional cleaning and maintenance and believed the issues had been addressed.
Now, two years later, moisture and mold concerns have once again disrupted the beginning of the school year. That history explains why many parents are asking not only how the mold will be cleaned, but why the building continues to experience moisture problems in the first place.
Why Can't Students Just Use the "Good" Classrooms?
It's probably the question being asked most often. If only a handful of classrooms tested positive, why not simply move those classes elsewhere?
The answer is more complicated than it appears. Schools share HVAC systems, hallways, common spaces, cafeterias, restrooms and emergency access routes. There also weren't enough unused classrooms available on campus to relocate every affected class. As more testing was completed, the district concluded that continuing to move students around while repairs continued wasn't the best long-term solution.
What Are They Actually Doing?
This isn't simply a case of wiping down classrooms. Restoration crews have been working around the clock using commercial-grade equipment to remove moisture and clean affected areas. The work includes HEPA vacuuming, wet cleaning of surfaces, carpet extraction and cleaning, HVAC system cleaning, antimicrobial treatments, air scrubbers, industrial dehumidifiers, independent environmental testing and continuous humidity monitoring.
Perhaps more importantly, the district has shifted its focus from simply cleaning mold to identifying why excess moisture is occurring in the first place. Architects, engineers, HVAC specialists and environmental consultants are now working together to determine whether there is an underlying issue with the building itself. Finding that answer may be the most important part of the entire process.
Breaking Update: The District Changes Course
Just when many parents were hoping Del Sur Elementary would reopen within days, Poway Unified released a significant update. Rather than continuing to delay the start of school while crews worked around students, the district has decided to temporarily relocate the entire Del Sur Elementary community to Stone Ranch Elementary for approximately one month.
According to the district, Del Sur students will begin school at Stone Ranch Elementary on Monday, August 24, remain there through September 18, and return to Del Sur on Monday, September 21, if remediation is successfully completed.
The district says this decision was made after reviewing the latest testing results with independent environmental professionals, district leadership and labor partners.
Interestingly, officials also revealed that most of the areas tested are now considered acceptable.
So why not reopen?
The answer lies in one sentence from the district's latest announcement:
"We do not want to approach the remaining concerns with another temporary solution."
Instead of reopening most of the campus while continuing to repair isolated areas, Poway Unified says it wants unrestricted access to the entire school so specialists can investigate the broader moisture and humidity conditions, complete additional corrective work and pursue what it calls "a more permanent solution."
That wording is significant. Earlier updates focused primarily on remediation and cleanup. This latest statement signals that the district is now trying to determine why the campus continues to experience moisture issues instead of simply treating the symptoms.
What Are Parents Saying?
The conversations throughout Del Sur have been surprisingly balanced. Most parents agree that children's health should always come first. Very few are suggesting students should return before the campus is safe.
Where opinions differ is over whether this situation could have been avoided. Some families are frustrated that concerns dating back several years appear to have resurfaced despite previous remediation efforts. Others appreciate that Poway Unified chose caution over convenience by relocating students instead of reopening while questions remained.
Many simply want transparency. Parents want regular updates, clear explanations, and confidence that the underlying cause, not just the symptom are finally being addressed.
The Childcare Challenge
While safety has understandably been the district's top priority, the timing has created enormous challenges for many families. Most summer camps had already ended. Parents had arranged childcare around the published school calendar. Many suddenly found themselves needing another week or more of care with very little notice.
Families have been taking unexpected vacation days, working remotely while supervising children, splitting childcare between parents, asking grandparents for help, organizing neighborhood playdates, searching for last-minute camps with available spaces and rearranging work schedules.
For households where both parents work full-time, the disruption has been significant. Now, with students relocating to Stone Ranch for approximately a month, families will also be adjusting to different drop-off routines, new traffic patterns and temporary schedules while two school communities share one campus.
What Happens Next?
Del Sur students are expected to begin classes at Stone Ranch Elementary on Monday, August 24. The temporary relocation is expected to continue through September 18, with an anticipated return to Del Sur on Monday, September 21.
The district says specialists will continue remediation, environmental monitoring and investigation throughout that time. Their goal is no longer simply cleaning the affected classrooms. It is identifying the underlying source of the moisture and humidity so the problem doesn't continue to return.
Looking Ahead
This latest announcement marks an important shift. The district is no longer talking simply about cleaning affected classrooms. It is now publicly acknowledging that additional investigation into the school's overall moisture and humidity conditions is needed before students return.
For many families, that offers some reassurance. Rather than reopening as soon as most classrooms passed testing, Poway Unified has chosen the more cautious approach, relocating students so experts have unrestricted access to investigate the campus and work toward a permanent fix.
The coming month will be critical. Parents will be looking for answers to three big questions: What is causing the recurring moisture issues? Can the district permanently solve the problem? Will students really be back at Del Sur on September 21?
As Del Sur residents ourselves, we're following this story closely because we know how much it affects our community. We'll continue sharing updates as new information becomes available and hope that when students finally return home, they'll be returning to a campus that's not just reopened but fully repaired for years to come.
