There are many ways to find potential hazards where you live. The easiest way is first to be aware of what could harm your health. Once you learn the places that could be a danger to you, it is much easier then to look for them.

There are websites that allow you to check for specific industrial operations such as trash incinerators, airports, hazardous waste facilities, Superfund sites and others. The internet in general is really good at finding news stories and links to other place near you that could be a problem such as contaminated water supplies, chemical companies, coal ash dumps and other issues. It takes time but is well worth it.