Which activities are generally exempt from SWM regulations?

The activities that are generally exempt from Storm Water Management (SWM) regulations include certain practices within mining and agriculture. This exemption is based on the understanding that these sectors have established best management practices and regulatory frameworks specific to their operations. For instance, agriculture often employs various conservation practices that effectively manage water runoff, and mining operations may utilize techniques designed to minimize environmental impacts inherently associated with their activities.

In contrast, construction activities, residential development, and new roadway construction typically pose higher risks of stormwater pollution due to soil disturbance, increased impervious surfaces, and potential pollutant runoff. As a result, these activities are subject to stringent SWM regulations to ensure that stormwater runoff is effectively managed to protect water quality and prevent erosion and sedimentation. The exemptions for mining and agriculture are thus grounded in their established practices and the specific nature of their regulatory requirements compared to the other options.