Hide Alert
Red alert icon for service disruption.

Our website will be unavailable from 8 to 9 p.m. on Dec. 19 for scheduled maintenance.

Stormwater Action Monitoring - status & trends studies

Stormwater Action Monitoring (SAM) conducts status and trend monitoring in Western Washington streams and nearshore marine waters.

A SAM symposium for the 2015-16 receiving water monitoring studies was held in September 2018. Find the agenda and presentations on the main SAM webpage under symposiums and workshops.  An upcoming February 2019 workshop will provide an update on the trend study design.

What is the goal?

The goal is to measure changes in Puget Sound lowland streams and urban nearshore areas as a result of stormwater management.

The Stormwater Work Group recommended four receiving waters studies in the 2013-2018 stormwater permit cycle:

  • Puget Sound draining lowland streams
  • Puget Sound urban nearshore sediments at one fathom
  • Puget Sound urban nearshore caged mussels
  • Puget Sound shoreline bacterial data compilation

What projects are underway?

  • Puget lowland streams — Over 90 random sites were sampled in 2015 for water, sediment, benthic and habitat.
  • Marine nearshore mussels — Two rounds of mussel sampling is planned this permit cycle at 40 random urban nearshore sites. The first round is complete and round 2 mussels monitoring will take place this winter 2017-2018.
  • Marine nearshore sediment — sediment from the 40 random nearshore sites was collected in summer 2016.

What are we learning?

blue and white SAM receiving water studies icon
Receiving waters sampling for streams and the marine nearshore were completed in 2015 and 2016. The marine mussels monitoring (round 1) and shoreline bacteria compilation project are now complete.  Final reports are underway for the Puget lowland streams and marine nearshore sediment studies.

Final reports for completed Status & Trend studies 

Marine Nearshore Mussels - Round 1
Marine Shoreline Bacteria

Option 2 monitoring to fulfill status and trends permit requirements

Some jurisdictions opted out of the pooled-fund SAM status and trends in receiving waters program. Their fulfillment of the permit requirement includes a separate receiving water study in their jurisdiction that follows SAM protocols. Pierce County and the City of Redmond both opted out for the 2013-2018 permit cycle.