Total Viable Count Hertfordshire

Total Viable Count Assessment At A Watton-at-Stone Indoor Air Project

This Total Viable Count (TVC) assessment carried out in Watton-at-Stone looked at the general presence of airborne mould within several occupied basement classrooms of an educational building

The aim of the project was to understand whether internal conditions within these regularly used learning spaces could be contributing to the build-up of airborne biological particles during day-to-day occupancy. Air samples were collected from a number of indoor classroom areas, along with an external reference point for comparison. This allowed for a simple comparison between indoor and outdoor air conditions at the time of testing.

Some variation in airborne mould levels between rooms was observed, which is fairly typical in environments where ventilation, occupancy and daily use differ from one space to another. Classrooms that are located below ground level, or that rely more on manual ventilation, can sometimes experience slightly different air movement patterns compared to areas with easier access to fresh air.

Overall, the project provides a useful snapshot of indoor microbial air quality at the time of survey and highlights how good ventilation, routine cleaning and regular building maintenance can all help support a comfortable indoor learning environment moving forward.

Total Viable Count Assessment in Welwyn Garden City; an Indoor Air Project

This Total Viable Count (TVC) assessment carried out in Welwyn Garden City focused on understanding the general presence of airborne bacteria and mould within different occupied areas of a working environment

The aim of the project was to get a clearer picture of how everyday workplace activities might influence indoor microbial conditions across spaces that are used regularly by both staff and visitors. Sampling was carried out in a range of internal locations, including customer-facing areas, kitchen spaces, office environments, and an external reference point for comparison. This helped provide a simple snapshot of how indoor air conditions compared with those typically found outdoors.

It was noted that variations between areas are fairly normal, especially in environments where food preparation, movement of people, or changes in ventilation can influence how airborne particles settle or circulate throughout the day. For example, busy operational zones may experience slightly different conditions compared to quieter office areas due to differences in footfall, airflow, or temperature.

Overall, the project provides a useful overview of indoor microbial air quality at the time of testing and highlights how ventilation, routine cleaning, and day-to-day working practices can all play a role in maintaining a healthy indoor environment moving forward.