The Pennsylvania Stormwater Control Ordinance (PASCO) is a statewide set of regulations established by the Pennsylvania Department of Environmental Protection (PA DEP) to manage and control stormwater runoff. These ordinances aim to provide guidelines for the proper management of stormwater in order to protect water resources and prevent flooding and erosion. PASCO requires municipalities and developers to implement effective stormwater management practices minimizing the adverse impact of increased runoff from urban and suburban development. Compliance with PASCO is necessary for obtaining various permits associated with construction and land development activities, such as National Pollutant Discharge Elimination System (NODES) permits. There are different types of Pennsylvania Stormwater Control Ordinances that vary according to the municipality and the local conditions. One such ordinance is the Model Stormwater Ordinance developed by the PA DEP, which serves as a template for municipalities to adopt and modify based on their specific needs. Additionally, larger municipalities in Pennsylvania may have their own individual Stormwater Control Ordinances tailored to address local stormwater management challenges. These ordinances could include specific requirements related to stormwater detention basins, infiltration systems, green infrastructure, erosion and sediment control, and the use of the best management practices (BMPs) for stormwater management. The Pennsylvania Stormwater Control Ordinances typically cover various aspects, including stormwater facility design standards, maintenance requirements, and guidelines for stormwater management plans. They also require the submission of stormwater management reports, inspection, and permit compliance monitoring. By implementing the Stormwater Control Ordinances, Pennsylvania aims to minimize the negative effects of stormwater runoff, such as pollution of water bodies with sediment, nutrients, and other contaminants. These ordinances also promote the use of sustainable stormwater management practices, such as green roofs, rain gardens, and previous pavements, to mimic natural hydrological processes and reduce the volume and velocity of stormwater runoff. Overall, the Pennsylvania Stormwater Control Ordinance plays a vital role in ensuring that development and construction activities are conducted in an environmentally responsible manner, safeguarding the quality of Pennsylvania's water resources and enhancing the resilience of its communities to stormwater-related issues.