By Sept. 15, Minnesota should know the location of all septic systems in the state. An audit was ordered by legislative action in 2009 requiring “directly or indirectly inspecting and providing an inventory for all subsurface sewage treatment systems.” It calls for direct inspection of each system “on riparian land or lake or near wetlands or other sensitive waters” to see if they are failing or provide an imminent health threat.Minnesota has seen an increase in funding for sewage programs through the Clean Water Legacy sales tax amendment passed by voters in 2008. It raised the sales tax from 6.5
