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September 20, 2017

Media Contact

Andrew Barth, 303-441-1032

Boulder County updates Stormwater Quality Permit (SWQP) requirements

New requirements for
construction projects are effective immediately

Boulder County, Colo. - Boulder
County recently updated components of its state and federally required
Stormwater Quality Permit (SWQP) Program. All SWQP information, including
applications and project checklists, can be found on the county’s
SWQP webpage.

part of Boulder County’s water quality protection and municipal separate storm
sewer system (MS4) construction program, a SWQP is required for construction
projects that:

  • Disturb one acre
    or more in size;
  • Are less than
    one acre and construction activity is part of a larger common plan of
    development that will ultimately disturb one acre or more, even if multiple,
    separate, and distinct land development activities may take place at different
    times; or,
  • Are within 100
    horizontal feet of a watercourse.

Stormwater Management at Construction
Sites is Important
stormwater runoff from construction sites often flows to storm drain systems
and is ultimately discharged into local streams and rivers, destroying aquatic
habitat. Sediment is usually the main pollutant of concern, but there are

  • Solid and
    sanitary wastes
  • Phosphorus and nitrogen
  • Concrete from
  • Construction
    chemicals, debris, and trash
  • Oil and grease
  • Pesticides

runoff from construction sites is typically 10 to 20 times greater than those
from agricultural lands, and 1,000 to 2,000 times greater than those from
forested lands.

County is required by the Environmental Protection Agency (EPA) and the
Colorado Department of Public Health and Environment (CDPHE) to maintain a
Stormwater Management Program.

For more information
on the Stormwater Quality Permit Program,
the county’s webpage
, or contact Brian James at 303-441-3507 or