The town Health Department suggests that you have your tank inspected by a professionally licensed septic system installer if you suspect that your tank may not be operating properly. The department maintains a list of current septic and well contractors and engineers working with the town. The Norwalk River Watershed Initiative offers a simple, non-technical brochure for homeowners called Septic Care & Maintenance for the Homeowner. It is available free online at Click on the septic care link and then click on the link for the downloadable format.