Your body absorbs everything in your environment one way or the other. There may be something in the water you drink. There may be something in the soil that you plant your garden in each year. Before you subject your family to any kind of damaging chemicals, it is worth it to check into environmental testing. It does not mean you can not be in your environment even if the environmental testing beings back poor results. It just means you may have to adjust some things to make it safer for you and your family.
Sometimes there are simple solutions to environmental problems. You may need to add some minerals to your soil to combat existing ones or just to make your soil healthier. You might also need a water softener or a filter on your water system. Before you can make any changes at all, you simply need to know what you are dealing with first.