Here’s an example scenario: a middle school principal in Columbia County noticed an unusual pattern. Three staff members in the same wing of the building had been out on extended sick leave with respiratory issues in the same semester. Student absenteeism in one specific cluster of classrooms was also running higher than the rest of the building. She could not tie any of it to a flu outbreak. Nothing was visibly wrong. The rooms looked fine.
The HVAC technician who came out to check unit ventilators found standing water in two of them, heavy biofilm on the coils, and filters that had been in place long past their replacement interval. Indoor air quality testing confirmed elevated mold spore counts in three classrooms. Two rooms also showed elevated levels of VOCs (volatile organic compounds, chemical vapors that off-gas from materials like cleaning agents, flooring, and furniture).
The building had not been neglected. It had been prioritized for other maintenance items while indoor air quality got pushed down the list. For a school, that is exactly the tradeoff that affects kids and staff most directly.
Why School IAQ Matters More Than Office IAQ
Children are not miniature adults when it comes to environmental exposures. They breathe more air per pound of body weight than adults, their lungs are still developing, and they spend six to eight hours a day in the same building, often in the same handful of rooms. The EPA’s Indoor Air Quality Tools for Schools program exists because the agency recognized that schools occupy a unique position in public health.
A classroom with mediocre IAQ affects students differently than an office with the same conditions would affect adult workers:
- Attendance. Children with asthma or allergies miss school more often when indoor air quality is poor. The CDC estimates that over 4 million children in the United States have asthma, and poor school IAQ is a documented asthma trigger.
- Performance. Studies published in peer-reviewed literature consistently show that ventilation rates, CO2 concentrations, and temperature in classrooms correlate with measurable differences in student test performance. Kids do not learn well when they cannot breathe well.
- Staff retention. Teachers who get chronically sick at school have higher turnover. Every year a school loses experienced teachers because of building-related symptoms is a year of institutional knowledge lost.
- Long-term sensitization. Repeated exposure to allergens and irritants during childhood can sensitize the respiratory system in ways that follow a person into adulthood.
The IAQ Issues That Show Up Most Often in Schools
School buildings have characteristics that make certain air quality problems more common than in offices or homes. Knowing what they are is the first step to catching them.
Ventilation Rate Problems
Older school buildings were often designed with less outdoor air per occupant than current standards recommend. The ASHRAE Standard 62.1 ventilation guidelines call for classrooms to receive a minimum amount of outdoor air per person, but many school HVAC systems do not meet that target either because of original design limits or because outdoor air dampers have been closed off over time to save energy.
CO2 concentrations are a proxy for ventilation adequacy. Normal outdoor CO2 is about 420 ppm. Indoor CO2 rising above 1,100 ppm in an occupied classroom suggests ventilation is too low for the number of people in the room. Above 1,500 ppm, students report more drowsiness, lower alertness, and worse performance on cognitive tasks.
Mold and Moisture
Moisture problems in schools come from roof leaks, plumbing leaks, HVAC condensate issues, and building envelope failures. Georgia’s humidity makes passive moisture management hard. A gymnasium with inadequate dehumidification, a locker room with chronic condensation, or a classroom with a flat roof that leaks twice a year all accumulate mold over time.
Visible mold in a school is only part of the picture. Hidden growth in wall cavities, under flooring, and inside HVAC equipment often produces the biggest spore loads in classroom air.
Cleaning Product VOCs
Commercial cleaning products used in schools can introduce high levels of VOCs, especially when used in poorly ventilated areas or at higher than recommended concentrations. Restroom cleaners, floor strippers, carpet cleaners, and disinfectants applied during the school day can elevate air contaminant levels for hours afterward. “Green cleaning” programs have reduced this problem in many districts, but it remains a common IAQ issue in schools that have not adopted such programs.
New Construction and Renovation Off-Gassing
When classrooms are renovated with new carpeting, paint, cabinets, or furniture, the materials can off-gas formaldehyde and other VOCs for weeks to months. Schools that reopen immediately after summer renovation projects, before adequate airing out, can expose students and staff to significantly elevated VOC levels during the critical first weeks of the school year.
Radon
Schools are also subject to radon risk. The EPA specifically recommends testing all frequently occupied rooms on the ground floor and in basements of school buildings. Georgia has numerous counties identified as EPA Zone 1 or Zone 2 for radon potential, including much of the CSRA. Despite this, school radon testing is not universally required and many school buildings have not been tested recently.
What Parents Should Ask
If you have a child in a CSRA school and are trying to evaluate the building’s indoor environmental quality, these are reasonable questions to raise with the principal or district facilities office:
- When was the last IAQ assessment performed on this building?
- When was the last time radon testing was performed in this building, and what were the results in ground-floor classrooms?
- What ventilation rate and CO2 monitoring does the district perform in classrooms, if any?
- After the last roof leak or plumbing leak in the building, was testing performed to confirm no mold growth resulted?
- What cleaning products are used in classrooms, and are they applied when students are present?
- Has the HVAC system been inspected and serviced in the past 12 months, including coil cleaning and filter replacement on schedule?
A well-run school district should have answers or know how to get them. If the answer is consistently “I don’t know,” that alone is a data point worth following up on.
What Administrators Can Start With
School administrators and facilities directors who want to get ahead of IAQ issues have a well-developed toolkit to work from. The EPA’s IAQ Tools for Schools Action Kit provides a proven framework that many districts nationwide have adopted successfully. Practical first steps include:
- Walkthrough assessments: A trained staff member or outside consultant walks each classroom looking for visible mold, moisture staining, blocked supply or return vents, strong odors, and HVAC equipment that is obviously dirty or malfunctioning.
- Targeted IAQ testing: Air sampling in rooms with known complaints, moisture investigations in rooms with history of leaks, and CO2 measurements in classrooms at peak occupancy.
- Radon testing: Every ground-floor and basement room on a multi-year schedule, with results published to parents.
- Written IAQ management plan: Defining responsibilities, monitoring schedule, complaint response procedures, and communication with parents and staff.
- Occupant communication: A reporting channel where students, parents, and staff can flag IAQ concerns without political friction, and where those concerns get documented and addressed.
Your Next Steps
- If you are a parent with a child who has respiratory symptoms that worsen at school, keep a log of when symptoms appear, which rooms the child was in, and what the weather was doing. Patterns matter.
- Ask the school to share its most recent IAQ assessment or radon test results. Public schools in Georgia are generally subject to open records requests, so the information is available even if not routinely published.
- If you are an administrator and your district does not have a current IAQ management plan, the EPA’s free Tools for Schools Action Kit is a fully developed template that requires no licensing fee and has been validated across thousands of schools.
If you are responsible for IAQ at a school or district in the CSRA and you want help planning a building-wide assessment, the EnviroPro 360 team can support you. Reach out any time.
