Stormwater & Drainage All Your Stormwater Permit Needs Get the forms and documents you need regarding stormwater. Continental Divide Tour Explore the Continental Divide in Richland County. EPA Best Practices Read about various methods of stormwater management. I Have a Project What to bring when applying for a Stormwater Permit. Impervious Areas See how impervious areas affect your watershed. NPDES/MS4 Learn about the National Pollutant Discharge Elimination System (NPDES). Drainage Learn about Ohio drainage laws, ditch petition, and neighborhood drainage issues. Ponds Read about types of ponds, new pond construction, and pond care and maintenance. Report a Land Concern Report a problem on your property you would like assistance with, or a concern regarding Stormwater Regulations. Stormwater Learn what stormwater is and how to manage better manage it. Townships See the watersheds, rivers, and streams of Richland County’s townships. Water Data Map See the average precipitation in the different watersheds with our interactive map. Watershed Map Learn about the unique watersheds of our county using our interactive map.