Theis Septic Service has been in business for 40+ years serving all of Winona County. We are the premier septic maintenance company in the area and provide services to ensure your system is performing at an optimal level. We clean and empty your septic tank properly to assure a longer life for your septic system. We provide unrivaled service and attribute our success to our attitude about cleanliness and the overall customer experience. The value for the services we provide are second to none. This is our only business, confirming that we are the experts in the septic maintenance industry.