Winter months and the implications regarding stormwater pollution control differ greatly from state to state. Some states have freezing conditions and snow, while others have sunshine and temperatures in the 70’s. Nonetheless, all states still require SWPPP inspections to be conducted on construction sites during the winter months. Depending on each state's Construction General Permit and local municipality regulations, SWPPP inspection frequency and SWPPP requirements may differ around the winter months. For example, here in Minnesota if the ground is frozen, properly temporary stabilized for winter and there is no construction activity going on, the sites’ inspections can be suspended for winter months/freezing conditions. However, as soon as the ground thaws, construction activity resumes, or there is snow melt runoff, SWPPP inspections must resume immediately.    

In states where snow is prevalent during the winter months, applying temporary stabilization prior to the start of winter is imperative. Applying temporary stabilization, such as hydromulch, straw mulch and erosion blanketing, ensures for a much smoother transition from winter into spring thaw. When snow and ice melt in the springtime, water and sediment start to flow at a very consistent and rapid pace. Ensuring disturbed areas have received temporary stabilization and all best management practices are in place prior to the winter months can drastically help reduce erosion and sediment displacement in the spring. Doing so will make for a much more compliant construction site in the springtime and will help reduce the risk of non-compliance with any state or local municipality.