Stormwater Best Management Practices 

Silt Fence


  • Landscaping and garden maintenance activities can be major contributors to river pollution. Soils, yard wastes, over watering and garden chemicals become part of the urban runoff mix that winds its way through streets, gutters, and storm drains before entering the river.
  • Poorly functioning sprinklers and over watering, for example, waste water and increase the number of pollutants flowing into storm drains.
  • Fertilizers, pesticides, and herbicides are washed off lawns and landscaped areas. These chemicals not only kill garden invaders, they also harm useful insects, poison fish, and contaminate ground and river water.
  • Leaves, grass clippings, and tree trimmings that are swept or blown into the street and gutters are also river polluters. These wastes clog catch basins, increasing the risk of flooding on your street, and carry garden chemicals into the river. As they decompose, they also absorb oxygen fish need to survive.
  • Best Management Practices that include the proper handling, storage, and disposal of materials can prevent pollutants from entering the river through the storm drain system.

General Landscaping

  • Protect stockpiles and materials from wind and rain by storing them under traps or secured plastic sheeting.
  • Schedule grading and excavation projects for dry weather.
  • Prevent erosion by planting fast-growing annual and perennial grasses. These will shield and bind the soil.

Garden & Lawn Maintenance

  • Do not over water. Conserve water by using irrigation practices such as drip irrigation, soaker hoses, or micro-spray systems.
  • Do not blow or rake leaves into the street, gutter, or storm drains.
  • Use organic or non-toxic fertilizers.
  • Do not over-fertilize and do not fertilize near ditches, streams, or other water bodies.
  • Store pesticides, fertilizers, and other chemicals in a covered area to prevent runoff.
  • Citizens of Coweta spend hundreds of hours a year mowing, clipping, raking and landscaping to keep our yards healthy and our property attractive. Our landscaping practices produce huge amounts of waste. Leaving clippings on the lawn reduces the lawn’s water loss and its need for fertilizer. Grass clippings returned to the lawn provide up to 25% of your lawn’s total fertilizer needs. Clippings contain about 4% nitrogen, 2% potassium and 1% phosphorus. While decomposing, they also serve indirectly as a food source for the bacteria in the soil, which are doing many beneficial things for a healthy environment.