







In October 2024, an Indoor Air Quality Assessment was carried out at a school in London after several staff members reported feeling unwell with symptoms like chest tightness, flu-like illnesses and headaches. The aim was to see if anything in the air such as dust, chemicals or poor ventilation could be contributing to how people were feeling.
The results were actually pretty reassuring for the school and its staff. Volatile organic compounds (VOCs), formaldehyde, carbon monoxide and dust levels were all well below guideline limits, meaning the air isn’t overloaded with any nasty substances. Carbon dioxide levels were slightly raised in a few rooms with high occupancy but even those were considered just marginal and not a serious concern.
Temperature and humidity levels were mostly within comfortable ranges, with just one or two spots—like the school kitchen—running a bit high on humidity.
The overall verdict was that the air quality is good and it’s unlikely that the symptoms reported were caused by chemical exposure or dust. A simple recommendation was made to open windows more often in busy rooms to boost airflow. With a few tweaks the school can keep the air clean and the staff feeling great.
In November 2024, an Indoor Air Quality Assessment was carried out at a multi-storey property in London following previous issues with water leaks and suspected mould. The aim was to check whether the air inside was safe and healthy following recent remedial works.
Air samples were taken throughout the property and compared with an outdoor background sample. The results were actually reassuring, showing that indoor mould spore levels were consistently lower than outdoors, showing that any remaining airborne mould presence was minimal. The most commonly detected spores indoors were Aspergillus/Penicillium, ascospores and basidiospores, which are typical in most environments and didn’t appear in high concentrations.
Surface sampling across multiple rooms also supported the findings that no active mould growth was identified, though there were light traces of environmental spores and dust, which are expected in everyday living spaces.
The overall conclusion was that the air quality indoors is in good shape, and the risk to health from fungal exposure is considered low. With continued good cleaning routines and ventilation, the property should remain a safe and healthy environment going forward. Nothing major needed, just keeping up the basics.
A recent Indoor Air Quality Assessment was conducted by our Occupational Hygienist in a London-based office to evaluate potential environmental concerns affecting occupants. The assessment focused on identifying biological, chemical and physical contaminants, ensuring that air quality meets health and comfort standards.
The findings were reassuring; levels of airborne bacteria, volatile organic compounds, formaldehyde, carbon dioxide and dust were all within acceptable limits. Ventilation was found to be effective, with fresh air supply adequately maintaining a healthy indoor environment. While humidity levels in some areas were slightly low, this was noted as a comfort issue rather than a health risk.
The investigation was prompted by reports of mild respiratory symptoms among occupants, but no significant contaminants were detected that could be linked to these concerns. With the current environmental conditions deemed safe, the recommendation is simply to maintain existing ventilation and air quality management practices.
This assessment provides peace of mind for both employees and management, ensuring a comfortable and healthy workspace. By staying proactive in monitoring air quality, businesses can create safer and more productive environments for their teams.
This project our team carried out in December 2024 focused on assessing indoor air quality in a basement-level commercial space in South Kensington, with a particular focus on mould contamination and ventilation issues. The goal was to ensure a safe and healthy indoor environment for occupants and visitors by identifying any potential concerns and recommending improvements.
The assessment covered various rooms, including offices, storage areas and recreational spaces. Air samples were taken to measure mould spore levels and findings indicated that indoor air quality was generally good, with no significant mould contamination detected. However, certain areas, such as the dungeon storage room and manager’s office, showed slightly elevated humidity levels, which could contribute to potential mould growth over time.
To maintain and improve air quality, recommendations were made to enhance ventilation, particularly in enclosed spaces where fresh air supply was limited. Regular monitoring, controlling indoor humidity, and maintaining proper cleaning practices were also advised to prevent any future issues.
By implementing these measures, the space can continue to offer a healthy environment, ensuring that staff and visitors are not exposed to unnecessary risks associated with poor air quality or mould contamination.
Sysco Environmental conducted an indoor air quality (IAQ) assessment in July 2024 at a two-story commercial property in London. The ground floor office space, which had been unoccupied for two years, was the focus of the evaluation. The assessment aimed to determine if the property was affected by any microbiological or chemical contaminants that could impact air quality. The investigation involved a comprehensive analysis of various air quality parameters, including airborne moulds, bacteria, formaldehyde, carbon dioxide, carbon monoxide, volatile organic compounds (VOCs), and particulate matter. Samples were collected from different rooms and compared to outdoor air samples to establish baseline measurements.
Overall, the results painted a positive picture of the indoor air quality in the office space. Fungal spore concentrations indoors were significantly lower than outdoor levels, indicating good air filtration. Chemical contaminants, including formaldehyde and VOCs, were well below recommended limits. Carbon dioxide and carbon monoxide levels were also within acceptable ranges, suggesting adequate ventilation.
The assessment concluded that the indoor air quality in the property could be described as good in terms of both biological and chemical contaminants. No significant sources of contamination were identified that could potentially cause adverse health effects. The report recommended maintaining current air quality management practices and suggested minor improvements to enhance comfort, such as humidity control through the use of plants or humidifiers.
This thorough evaluation provides valuable insights into the air quality of the office space, offering reassurance about its suitability for future occupancy.
We recently conducted an indoor air quality assessment at a veterinary clinic in London, focusing on a storage room in the basement. The aim was to evaluate the air quality regarding biological and chemical contaminants, ensuring a healthy environment for staff and animals.
We tested for airborne fungi, carbon monoxide, volatile organic compounds (VOCs), and particulate matter. The results were reassuring, showing good air quality overall. The levels of carbon monoxide and VOCs were well below the safety limits, indicating no significant risk. Airborne fungal spores were also found to be lower indoors compared to the outdoor environment, suggesting no indoor contamination sources.
However, we did detect some surface colonisation by Aspergillus mould in the storage room. We recommended maintaining constant temperature and humidity levels, possibly using a humidifier or introducing house plants to improve air quality further. Regular cleaning and ventilation should keep the air quality within safe limits.
Overall, the clinic's indoor air quality is good, with minimal risk from contaminants, ensuring a safe and healthy environment for everyone.
At Sysco Environmental Ltd, we recently conducted an Indoor Air Quality (IAQ) survey in London, aimed at ensuring a safe and healthy environment for the occupants. Our investigation focused on identifying potential sources of indoor air contaminants, assessing ventilation efficiency, and measuring various airborne pollutants. Throughout the survey, we thoroughly examined multiple factors that could impact air quality, including biological contaminants, chemical pollutants, and particulate matter.
Our findings revealed that the indoor air quality in this London office building is generally good, with most areas meeting the established safety standards. However, we identified a few spots with slightly elevated levels of airborne bacteria and carbon dioxide, suggesting a need for improved ventilation in those specific areas. These insights are crucial for maintaining a healthy indoor environment, as they help pinpoint areas where enhancements can be made.