Sources

Contaminant

Source

• some insulation installed between 1930 and 1950
• some old wood stove door gaskets
• some vinyl floor tiles
• drywall joint compound and textured paint obtained before 1977
• cement-asbestos millboard, exterior wall shingles
• some ceiling finishing plaster installed between 1945 and 1973
• some fire retardant on structural steel

• power generation (gas, coal, oil)
• wood and coal stoves
• internal combustion engines
• fireplaces
• candles

• cigarettes
• cigars
• pipes

• some particle board, plywood, pressed-board, panelling, carpeting, carpet backing
• some furniture and dyes
• urea-formaldehyde insulation foam
• some household cleaners, deodorizers
• combustion
• some glues and resins
• cosmetics
• permanent-press clothing

• fungi, including mould and mildew
• animals
• humans

• gas emitted by soil, rocks, water
• natural gas
• granite building materials

• solvents and cleaning compounds
• paint
• glue
• spray propellants
• fabric softeners and deodorizers and perfumes
• combustion
• dry cleaning fluid
• some fabrics
• petrol
• water outgassing
• building materials
• wax and polishing compounds
• pens and markers
• binders and plasticizers