Top  pollutants commonly found in houses have the greatest effect on health which includes:

1. Bisphenol A (BPA) which is found in plastics have negative effects on brain and behavior in children.
2. Oxybenzone found in sunscreens, lip balm, and moisturizers and associated with hormone imbalances and low birthweight babies.
3. Fluoride found in toothpaste and tap water is linked to neurotoxicity, Alzhemier’s disease, decreased IQ in children, tumors and thyroid disorders.
4. Phthalates found in toys, raincoats, shower curtains, vinyl flooring, detergents, food packaging, and shampoos can reduce sperm count, reproductive problems and linked to liver cancer.
5. Parabens found in moisturizers, hair care and shaving products are linked to hormone disruptions and cancer.
6. Butylated hydroxyanisol found in chewing gum, snack foods, and diaper creams may promote cancer.
7. Perfluorooctanoic acid found in tap water, nonstick pots and pans can cause hormone disruption and infertility.
8. Perchlorate found in drinking water, soil, vegetables causes thyroid disorders.
9. Decabromodiphenyl ether found in electronics, furniture and carpets can cause permanent learning and memory problems, hearing defects and decreased sperm count.
10. Asbestos found in housing insulation, drywall artificial fireplace logs and toys is associated with mesothelioma.
11. Cigarette smoke is associated with lung disorders. 
12. Mold and fungus that are linked to inflammatory diseases.
13. Bromide  found in baked goods is associated with thyroid gland dysfunction
14. Lead has been linked with serious deficient. Children are still at risk for lead exposure, especially if they live in a home built prior to the 1978 ban on lead-based paint.
15. Mercury is a naturally occurring element that is found in air, water, and soil. Exposure to mercury even in small amounts may cause serious health problems, and is a threat to the development of the child in utero and early in life. Mercury may have toxic effects on the nervous, digestive and immune systems, and on lungs, kidneys, skin, and eyes. People are mainly exposed to mercury when they eat fish and shellfish that contain the compound. It is contained in many products, including batteries, measuring devices, such as thermometers and barometers, electric switches and relays in equipment, lamps (including some types of light bulbs), dental amalgam (for dental fillings), skin-lightening products, and other cosmetics and pharmaceuticals.
16. Arsenic when absorbed through drinking water, this chemical has been linked to reduced cognitive function in schoolchildren. Arsenic exposure during the first trimester of pregnancy is known to cause intellectual disabilities. Prenatal arsenic exposure may lead to diseases later in life; bladder cancer has been known to develop up to 20 years after exposure. Pollution has made groundwater contamination of arsenic a worldwide problem that affects people, crops, and livestock. Many of the foods that we eat i.e. plants and animals are contaminated with arsenic because of exposure to arsenic-contaminated water. Rice and rice products i.e. organic brown rice syrup, in particular, can contain high levels of arsenic. Nutritional supplements that contain ingredients from China are also at risk for arsenic contamination. Arsenic is a carcinogen and exposure can lead to cancer and other toxic health effects, including cardiovascular disease, neurological problems, and developmental disorders.
17. Manganese is a trace element that occurs naturally in soil, water, and plants. Several studies have linked excessive manganese exposure and neurological disorders in children. It has been linked to lower scores in math, diminished intellectual function, and ADHD. Metallic manganese is used primarily in steel production to improve hardness, stiffness, and strength. It is also used in carbon steel, stainless steel, and high-temperature steel, along with cast iron and super-alloys.