Activities that take place at industrial facilities, such as material handling and storage, are often exposed to the weather. As runoff from rain or snowmelt comes into contact with these activities, it can pick up pollutants and transport them to a nearby storm sewer or directly to a river, lake, or coastal water. To minimize the impact of industrial stormwater discharges, regulations exist for 10 categories of industrial activity. These regulations require authorization under an industrial stormwater permit or certification that industrial activities are not exposed to stormwater runoff.
Idaho is one of four states, along with the District of Columbia, that has not received federal authority to issue industrial stormwater permits. As a result, the permitting authority is the U.S. EPA. To seek an individual permit or apply for coverage under the general permit you must submit an application to your regional U.S. EPA Office prior to commencement of your industrial activities. These permits must be renewed every five years. All industrial stormwater permits include the requirement that a stormwater pollution prevention plan (SWPPP) be developed and implemented.
Alternatively, you may certify that your industrial activities are not exposed to stormwater runoff by submitting a "no exposure certification." As long as the condition of "no exposure" exists at a certified facility, the operator is excluded from industrial stormwater permit requirements. The no-exposure certification must be re-submitted every five years. If conditions change at the facility and materials or activities become exposed, the facility must immediately file for a stormwater permit.
In addition to these rules, you may be required to meet additional local stormwater regulations. Check with your city or county government to determine if additional local rules apply to your industrial facility.
Use the Idaho and U.S. EPA links below to locate permit application forms, no-exposure certification forms and guidance documents.