Illicit Discharge Detection and Elimination (IDDE) Program Resources
Resources and guidance on IDDE for local stormwater managers.
IDDE Program Guidance
IDDE Regulations Guidance
IDDE Materials from Permittees
The following materials were prepared by Washington state municipal
stormwater permittees to support their permit implementation. The permittees
have made these materials available to others to modify for their own use.
Ecology has not formally reviewed and approved these materials.
- The City of Pullman's
IDDE Success Story "Stormwater Sleuths Solve the Mystery of
the Putrid Pipe" describes an IDDE investigation by the city's
- Seattle Public Utilities created this short and simple video to help businesses learn how to respond to small
spills using a standard spill kit.
- Kitsap County partnered with other West Sound jurisdictions
to explore ways to better educate citizens to recognize spills
and discharges that degrade water quality. The
multi-jurisdictional team identified opportunities to promote the
regional spills hotline and increase public awareness of stormwater pollution. This
background research report documents
outreach methods from around the country. A
summary of findings
from two area focus groups documents citizen awareness of the
storm drain system and pollutants, and tests hotline messaging,
graphic concepts, and outreach methods/products. Funded by
an Ecology Grant of Regional or Statewide Significance.
- Thurston County has partnered with the cities of Lacey, Olympia, and
Tumwater to create an education program aimed at restaurant owners to
eliminate improper disposal of grease/oil. Improper washing of hood
filters and kitchen mats, improper cleaning of debris and dumpster
maintenance and improper storage or disposal of kitchen grease/oil results
in pollution being carried to storm water facilities, such as storm drains
or ditches, and into bodies of water, such as streams, lakes. Inspectors
provide one-on-one technical assistance visits and provide hood stickers and
poster that targets best management practices (BMPs).
- Kitsap County Water
Pollution Webpage NOTE: Kitsap County has offered to insert any
jurisdiction’s contact number in its “Report
Water Pollution” graphic. Please contact Callene Abernathy,
for assistance. Users may also be able download the original drain graphic
used by Kitsap County from their website.
Snohomish County field personnel training presentation and ‘knowledge
Contact Steve Britsch at
Snohomish County if you are interested in PowerPoint versions of either
- Snohomish County “Stormwater
Pollution Found in Your Area!” doorhanger. Based on a publication from
Nonpoint Source Outreach Toolbox.
- Snohomish County IDDE Staff Training. Contact Arthur Lee (firstname.lastname@example.org)
at Snohomish County if you are interested in PowerPoint versions of this
two-part training presentation.
- Carpet cleaning fact sheet
– developed by the Interagency Regulatory Analysis Committee (a
consortium of city, county, and state government agencies in King County),
this information and BMP guidance targets carpet cleaning businesses.
Mobile Carpet Cleaners guidance from Project Clean Water in the San Diego
Region, includes “Do’s and Don’ts” and BMPS.
Resource Venture is the Seattle Public Utilities business education and
assistance program with materials on best practices for a variety of small
- Dry weather screening materials:
- Bainbridge Island’s Water Resource Program prepared this
IDDE Manual (April
2010) to direct all facets of the City’s Illicit Discharge Detection and
Elimination Program. Topics covered include MS4 mapping, outfall
inspections, conducting follow-up investigations, and corrective actions.
Forms and equipment checklists are also included. With Bainbridge Island’s
permission, four North King County jurisdictions collaborated to convert
this manual into an
Manual template that permittees may fill in to document their program(s).
- Ecology prepared this
kit checklist to support the work of the
Control Program, which supports local government efforts in Puget Sound
and Spokane with on-site technical assistance to businesses. This kit
checklist will help create a kit that could be used to mop up small oil and
grease spills. Other types of kits are designed for specific spill types –
other chemicals, other viscosities, etc.
- Seattle prepared this
presentation about when and how to perform dye testing as a tool to
identify illicit connections to the stormwater system.
- City of Auburn Standard Operating Procedures (SOPs) in Word format (and
forms) for dry weather screening activities:
- This auto shop poster
created by Kitsap County with several statewide partners to educate auto
shops across Washington State about BMPs for auto-related wastes. It is
being piloted in three state regions and, if modified, will be updated here.
The County recommends printing and laminating the poster professionally and
sized 8” x 14”. There is a blank space at the lower left hand corner to
insert your logo and contact information. Funded by an Ecology Grant of
Regional or Statewide Significance.
- Snohomish County and its partners in Kitsap County and the cities of
Moses Lake, Wenatchee and Seattle, developed an education and outreach
campaign (Dump Smart – It’s Not Just Water) for 3 mobile business sectors:
carpet cleaners, painters and power/pressure washers. Find out how to run
this mobile business education program in your jurisdiction in the
Dump Smart – It’s Not
Just Water, Stormwater Pollution Prevention for Mobile Businesses, June 2011
project report. Contact your Ecology regional permit specialist if you
need the educational materials in a native file format and if you need
window clings (a limited supply is available). Funded by an Ecology
stormwater Grant of Regional or Statewide Significance.
IDDE Sample Regulations
King County Code Chapter 9.12 Water Quality: Sections 4-7 (beginning on page 21) address requirements for local discharge
prohibitions found under the Illicit Discharge Detection and Elimination (IDDE)
special condition of both the Phase I and Phase II permits.
The City of Port Angeles adopted an
ordinance to meet permit
requirements to prohibit illicit discharges and connections. See Port
Angeles Municipal Code sections 13.63.130 through 13.63.160.
The City of
Puyallup’s draft ordinance to meet IDDE requirements for prohibiting
The City of Snohomish adopted an
to prohibit illicit discharges and connections.
The City of Burien developed a
tracking form to record response actions.
The City of Longview passed an ordinance that prohibits illicit discharges and connections.
Additional examples/submittals are welcome and encouraged.
Please work with your regional permit manager to add your SWMP program materials
to this website.
Copyright © Washington State Department of Ecology. See http://www.ecy.wa.gov/copyright.html.