Quick facts on some of the contaminants we test for:

PM10 and PM2.5

Fine particles directly emitted from aerosols, power plants, industries, construction activities and automobiles.

Formed by all metabolic activity and combustion activities. Elevated levels of CO2 indicate an insufficient amount of fresh...

Concentration of Total Volatile Organic Compounds (TVOC) is up to ten times higher indoors than outdoors. Main sources are...

Formaldehyde (HCHO) is emitted as gas from certain solids or liquids. Concentration of HCHO is consistently higher indoors...

A non-flammable gas with a penetrating odour that irritates the eyes and nose-lung air passages.

A product of combustion, automobile exhaust, tobacco smoke, fossil fuel-fired electricity generating stations and indoor space heaters.

O3 can impair lung function and cause irritation to the respiratory tract. If exposure is high, it can cause irreversible...