Detergents that you use for cleaning the house, washing your dishes or clothes contain strong chemicals. Unless you use organic, toxin-free products, the chemicals from these detergents get in your drains eventually and end up in the global water pool.
Try to switch to environmentally-friendly detergents to reduce your impact. These products are also better for your skin and airways. Moreover, a lot of house chores can be done with natural and readily available products – lemon, sodium, vinegar, and natural essential oils.