Municipal Separate Storm Sewer System (MS4) Permits
Storm Water Program Coordinator:
The 2016 small MS4 general permit was issued and took effect April 1, 2016. The permit and associated fact sheet may be found at the appropriate links to the left.
EPA's Phase II Final Rule published in December, 1999, included permit requirements for designated small municipalities and certain facilities that maintain control of a separate storm sewer system. This is the small MS4 (Municipal Separate Storm Sewer System) Permit and it covers storm water discharges from these systems.
The objectives of the Phase II regulations are to: (1) Reduce the discharge of pollutants to the "maximum extent practicable" (MEP); and (2) Protect water quality.
Excerpt from EPA's Storm Water Phase II Final Rule published in October, 1999...... "Common pollutants include oil and grease from roadways, pesticides from lawns, sediment from construction sites, and carelessly discarded trash, such as cigarette butts, paper wrappers, and plastic bottles. When deposited into nearby waterways through MS4 discharges, these pollutants can impair the waterways, thereby discouraging recreational use of the resource, contaminating drinking water supplies, and interfering with the habitat for fish, other aquatic organisms, and wildlife."
In order to meet these objectives, an MS4 must implement a program by identifying approved best management practices (BMPs) for the 6 control measures referenced in the permit. The MS4's program must also include measurable goals that will be used to evaluate the progress towards meeting the completion of each BMP selected to satisfy the minimum control measures.
There is no fee to obtain storm water discharge permits.
Last Updated: 04/01/2016