Water Quality



Keeping our local waters clean and cool is important for native aquatic life and for human health.

Clean water is particularly important to species that are sensitive to pollutants, including our native salmon and a broad variety of insects, amphibians, and mollusks. ENR monitors sites both on and off the reservation for compliance with water quality standards; this includes natural parameters such as pH and temperature as well as the presence of microbes that can be toxic to humans and wildlife.

Information is available on how to prevent pollution from entering waterways and can be found on the Environmental Protection Agency “My Waterway” website.

Projects such as the native landscaping project at the administration building and the ENR office rain garden exemplify solutions for managing polluted storm water runoff using native plants.


ENR Staff Water Quality Testing

ENR Staff Water Quality Testing

ENR Staff Water Quality Testing

Water Quality Resources

Snoqualmie Tribe ENR Studies

Snoqualmie Tribe Freshwater Mussel Surveys

Freshwater mussels are an understudied species. However, they are an extremely important part of the ecosystem yet they face numerous threats. Performing field surveys helps give better understanding to the habitat needs of freshwater mussels and their current population status. Click on the link above to learn more.

Pollution Prevention Resources

Pollution Prevention Assistance – Washington State Department of Ecology

We partner with local city and county organizations that provide pollution prevention assistance (PPA) to businesses and organizations in their community.


Environmental Protection Agency “My Waterway” Website

Information on how to prevent pollution from entering waterways near you.

PNW Tribal Wetland Working Group (TWIG)

PNW Tribal Wetland Working Group (TWIG)

Mission & Objectives

The Tribal Wetland Working Group [TWIG] exists to share knowledge in support of the restoration and protection of wetlands and other aquatic resources from a tribal perspective.

    1. Promote wetland and aquatic resources training opportunities for Tribes.
    2. Provide a venue for information sharing and transfer of technical expertise regarding restoration, protection, and management strategies for wetlands and aquatic resources, between staff of Pacific NW Tribes.
    3. Support development and implementation of wetland and aquatic resource monitoring strategies.
    4. Increase awareness of cultural importance of wetlands and aquatic resources.
RainWise - King County Program

Be RainWise – A King County Program

RainWise helps private property owners install rain gardens and cisterns to help manage the rain that falls on their roofs. In addition to stopping water pollution, these installations can add attractive landscaping, provide water for summer irrigation, and may reduce flooding

Snoqualmie Tribe ENR Bioswales & Rain Gardens

For more information about the bioswale and rain garden work that ENR has done, please click on the link above.

"Stormwater runoff pollution and how to reduce it" - King County

“Stormwater runoff pollution and how to reduce it” – King County Water and Land Services

Stormwater runoff is rain that falls on streets, parking areas, sports fields, gravel lots, rooftops or other developed land and flows directly into nearby lakes, rivers and Puget Sound.

Across the U.S., unmanaged stormwater runoff has caused serious damage to streams, lakes and estuaries, particularly where land uses change from rural to urban activities. It is taking its toll in Puget Sound, too. In Washington state, stormwater pollution contributes to 30 percent of the pollution in waters with some pollution problems. Most of the four million people who live in the Sound region contribute to stormwater pollution every day.