Water Pollution and Spills

Water is one of our most precious natural resources. Keeping water clean benefits people, animals and fish. Everyday practices at home or work directly affect the quality of our water.

The City of Issaquah promotes the protection of water quality and offers many resources to educate the community about how to protect it.

Report a spill or water pollution: Call 425-837-3470

Call 911 if you need to report emergency concerns that involve imminent danger to people or the environment.

Pollution Source Control

The City Public Works Engineering Department established the Source Control Program in 2008 to work with local businesses to reduce pollution.

The term source control refers to controlling or intercepting pollution at its source, before it enters the environment. Learn more about our Source Control Program.

Friends of the Issaquah Salmon Hatchery (FISH) has an environmentally-friendly car wash kit available for loan to the community. To learn more, visit issaquahfish.org/resources.

Water Quality Monitoring

The Aquatic Resource Monitoring Program is an integrated, long-term surface water program that monitors water quality and habitat conditions along streams within the City.

The goal of the monitoring program is to identify baseline conditions, detect changes in resource conditions caused by development and resource enhancement, and examine trends over time.

Currently, water quality monitoring is being conducted on Issaquah Creek (including North and East forks), Tibbetts Creek, Laughing Jacobs Creek and Lewis Creek. Monitoring of baseflow and stormflow conditions is conducted at nine locations eight times per year.

State of the Waters Report: 1999-2010

The results of City monitoring from 1999-2010 are summarized in the State of the Waters Report.