Like any other part of your infrastructure, drywells, catch basins and other drainage systems need periodic maintenance to function at optimum levels. Over time, silt, sediment and debris build up in the system and reduce the drainage efficiency. This may lead to water standing beyond the municipal requirement which can result in citations. It also inconveniences customers at retail locations and residents in communities. With Arizona leading the nation in the number of West Nile cases and other diseases carried by mosquitoes, standing water is a particular concern. A lack of maintenance can eventually lead to costly repair of the system as well as the area around it.