The NPDES Permit requires compliance with all applicable water quality regulations related to stormwater runoff as well as ensuring that all of the county's Municipal Separate Storm Sewer Systems (MS4s) are functional and well-maintained. The Permit also requires the county to document enforcement statistics for each reporting year. Enforcement action typically includes monetary penalties, notices of violation, written warnings as well as citations issued to owners and/or operators.

Illicit Discharge Violations: This violation type covers a wide variety of infractions of state water quality standards. Failure to properly install adequate erosion and sediment controls can result in the discharge of turbid waters from a development site into adjacent waterways, wetlands or other natural systems. Illicit discharges are the discharge of anything other than stormwater runoff into Municipal Separate Storm Sewer System (MS4) facilities.

Illegal Fill Violations: The deposition of fill requires a County permit, except when it involves under five cubic yards that is in upland (non-floodplain and not wetland). Filling in wetlands or in floodplains is regulated and permits (County and/or Water Management District) may be required for such activities.

Illegal Dumping Violations: This violation category includes the disposal of "waste" or trash or refuse of any kind in areas other than legal collection sites.

Erosion and Sediment Control Violations: Improperly installed erosion and sediment control Best Management Practices (BMPs) or lack of such BMPs, may result in violations of state water quality standards resulting from sediment discharge into wetlands or downstream areas. Each active construction site meeting the 1-acre threshold is expected at the site to include a display of a Notice of Intent to Issue (NOI) and the Surface Water Pollution Prevention Plan with appropriate BMPs.