Stormwater Quality in Mountlake Terrace

The Hall Creek - Lake Ballinger drainage basin collects stormwater runoff from Mountlake Terrace as well as the cities of Lynnwood, Edmonds and Shoreline.

All these areas have experienced expansion of impervious areas with increased development. More impervious areas such as streets, parking lots, and building roofs increase runoff to surface streams and lakes. This runoff also carries with it pollutants picked up from streets, lawns, construction sites and commercial properties. Common water quality problems from polluted runoff include depleted dissolved oxygen levels, increased water temperature, excess nutrients, hydrocarbons, heavy metals and pesticides.

For this reason, all new development and redevelopment projects must meet state water quality standards for stormwater runoff during and after the construction portion of the project. 
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New:  Mobile Cleaning Best Management Practices

Mobile Cleaning Businesses - Best Management Practices

What You Can Do


While these practices can help keep surface water clean there are some simple things you can do to help ensure that our streams remain healthy such as:
  • Clean up after your pet by using a pet waste disposal station or garbage can.
  • Choose natural methods of pest control and if pesticides must be used, use them sparingly.
  • Maintain stream buffers by protecting shrubs, vines and other plants along streams.
  • Use fertilizers sparingly on lawns and gardens, and use natural organic fertilizers. Consider using natural and organic methods of lawn care.
  • Keep toxins out of stormwater drains (including engine oils, paint, paint thinners, and pesticides.)  Dispose of them safely at a household hazardous waste collection site.