public works

Best Management Practices (BMPs) (How You Can Help)

Press Enter to show all options, press Tab go to next option

If you are involved in the activities such as carpet cleaning, residential automobile repair and maintenance, landscaping activities and vegetation management, vehicle washing, pet waste, residential gardening and lawn care, the following is our recommended best management practices (BMPs). 

Carpet Cleaning

  • Dispose wash water in the sanitary system
  • Do not dispose wash water into storm drain system

 Residential Automobile Repair and Maintenance

  • Always keep used vehicle fluids in container with tight fitting lids
  • Do not dispose of used vehicle fluids into a storm drain system or onto the ground
  • Immediately clean up spills with absorbent materials and dispose of them in a garbage can
  • Do not hose down spills into the street or storm drain
  • If you want to clean the engine or undercarriage of vehicle, bring vehicle to a commercial car wash facility

 Landscaping Activities and Vegetation Management

  • Do not apply pesticides and fertilizers when it is raining
  • Immediately clean up spills of pesticides
  • Follow manufacturers’ recommendations and label directions for the use of pesticides
  • Dispose collected vegetation by recycling or composting
  • Do not dispose collected vegetation into storm drain system
  • Consider using Integrated Pest Management (IPM) approach for pest control

 Vehicle Washing

  • Wash vehicle at a commercial car wash facility
  • Wash vehicle on a non-paved area, where wash water can seep into the ground
  • If you wash vehicle on a paved area, use a wet vacuum to collect wash water and dispose it into sanitary system

 Pet Waste

  • Scoop it! Bag it! Trash it!
  • Flush it down to toilet
  • Do not bury or compost
  • Do not dispose it in yard waste collection bins

 Residential Gardening and Lawn Care

  • Manually or mechanically remove weeds or pests as possible rather than using pesticides
  • Compost your yard wastes and use it as mulch in your yard or garden
  • Do not dispose or dump grass clipping or other vegetation into storm drain system
  • Use the least amount of pesticides as possible and always follow the label directions
  • Do not apply pesticides or fertilizers when it is raining
  • Always keep fertilizer or pesticide containers in a covered area

King Conservation District - Urban Aquatic Area Enhancement Services

King CD is currently working to add several different tools and resources to our “Urban Shorelines & riparian Habitat Improvement” page ( with the goal of being a full service location to help homeowners and city staff find restoration resources around streams and wetlands. 

Flyer [PDF]

Catch Basin Clearing - Autumn Leaves

Catch Basin Clearing Photo - 092619

As the autumn leaves begin to fall and the rainy season returns to Maple Valley, the City is asking for your help to reduce street flooding by clearing catch basins of leaves and debris.

What are catch basins?

The grated lids that you see on almost every street allow rain water to drain from streets to ponds or other stormwater treatment before discharging to the ground or to streams or lakes.

What are the consequences of a blocked catch basin grate?

When catch basin grates get clogged by recently fallen leaves and debris water can no longer be drained from the street. Water ponds along streets and can flood intersections and homes.

How can you help keep catch basins clean?

While the City works to clear storm drains and keep runoff flowing, we are not always able to keep up with falling leaves. If you have a catch basin in front of your home, you can help prevent catch basin clogging prior to storms by using a rake to clear limbs, leaves and debris from the grate of the catch basin. Do not attempt to remove the grate, only the debris on the top. You can dispose of these leaves and debris in your yard waste bin (please separate out any trash that may have also accumulated).

You can also prevent clogging by picking up or bagging fallen leaves in your yard or on the sidewalk instead of blowing or sweeping them into the street.