Ernie's Septic is a locally family owned business for over 52+ years. Since the initial owner, Ernest Johnson Sr, has passed away in March of 2021, his son has taken over. Ernest Jr has learned many things from his father over the years and is excited to continue to provide excellent neighborly service at unbeatable prices. Located in Marengo, IL, we service much of McHenry , Boone, and DeKalb Counties.