Alviso, California is a small town located in Santa Clara County. The city has a Mediterranean climate with hot and dry summers and mild and wet winters. The town is situated on the southern edge of San Francisco Bay and is surrounded by several creeks and marshes. The area is known for its stunning natural beauty and is home to several outdoor recreation opportunities, including hiking and biking trails. The town is also popular among bird watchers, as it serves as a stopover for migratory birds. However, the area is also known for its high levels of mercury and other hydrology constituents, which have led to concerns about the health risks for residents.