GerES IV for children has started in May 2003. 1.800 children from 150 sampling locations are analysed. A pilot study testing the sampling instruments was conducted in 2001-2002. GerES IV is performed in cooperation with the Health Survey for Children and Adolescents (KiGGS) which is conducted by the Robert Koch-Institute.
Using data of both surveys it will be possible to evaluate relations between environment and health such as:
- Occurrence of mould spores, house dust mites or pet allergens in homes and allergic sensitisation. 
- Allergies due to nickel, chromium (from, e.g., costume, jewellery, piercing) or scents (e.g., terpenes in indoor air). 
- Impact of noise on hearing loss, stress and sleeping disturbances. 
- Irritation of the eyes and the respiratory system due to formaldehyde, aldehydes, or VOC in indoor air.