Lake Pontchartrain is an estuary in the Southeastern region of Louisiana. Lake Pontchartrain connects to the Gulf of Mexico through two inlets, or straights, which allow its water to drain into Lake Borgne and eventually into the Gulf. The abundance of dairy farms and oil pipelines, as well as sewage treatment plants in the Lake Pontchartrain Watershed, has made it unsafe for humans to swim in most areas of the lake. There are many organizations working to correct this pollution problem and in some areas they have been successful. Lake Pontchartrain is vital to the health of the surrounding ecosystems, and it is also an important part of Louisiana’s economy when its resources are used wisely.