Blood, Trauma, and Biohazard Cleanup in Collinsville, IL

Collinsville is a city located mainly in Madison County and partly in St. Clair County, Illinois, about 14 miles east of St. Louis, Missouri, in the Metro East region.

Collinsville contains Cahokia, the largest Pre-Columbian settlement north of Mexico: at its peak around 1200 CE the Mississippian city held an estimated 20,000 to 30,000 people, more than any city in the present-day United States until after 1800.

Cahokia Mounds State Historic Site, a UNESCO World Heritage Site and National Historic Landmark within Collinsville, preserves more than 70 earthen mounds, including Monks Mound - the largest prehistoric earthwork in the Americas, with a base larger than that of the Great Pyramid of Giza.

The modern town was settled by the Cook family and a group of German-American settlers who arrived by Conestoga wagon from Pennsylvania in 1812 and founded Holy Cross Lutheran Church.

The 2020 census counted 24,366 people, 10,479 households, and 6,628 families in Collinsville.

Collinsville bills itself as the 'Horseradish Capital of the World' - the surrounding area is said to produce 85 percent of the world's horseradish - and it celebrates with a Horseradish Festival on Main Street during the first weekend of June each year.

Collinsville's most famous landmark is the Brooks Catsup Bottle Water Tower, built in 1949 for the G.S. Suppiger Company: a 170-foot-tall water tower shaped like a catsup bottle, holding 100,000 gallons, billed as the world's largest catsup bottle and listed on the National Register of Historic Places.

Coal mining built early Collinsville - by 1922, some 3,000 miners and their families made up almost a third of the city's 9,800 residents.

Fairmount Park Racetrack, opened in Collinsville in 1925 with a one-mile dirt oval, is one of only five horse racing tracks in Illinois and the only one located outside the Chicago area.

Collinsville High School's teams are the Kahoks - pronounced 'Kay-Hawks' and named in honor of Cahokia - competing in the Southwestern Conference, and the school district marked 100 years of the Kahok mascot in 2025.