Air Quality Index (AQI)
The Air Quality Index (AQI) tells you when air quality is healthy or unhealthy.
Marine water & sediment monitoring
We conduct water and sediment long-term monitoring to identify ecosystem changes.
River and stream flow monitoring
We report the amount of water flowing through Washington’s rivers and streams using graphs and maps.
We collect data on the health of environmental systems that support plant and animal life.
Long-term marine water & sediment data
We gather high quality data to help accurately reflect changes in marine environments over time.
Find standards for Ecology's GIS data.
Streamflow monitoring contacts
Contact the stream hydrologist assigned to your watershed.
Water quality monitoring methods for rivers & streams
Learn how we measure water quality in rivers and streams, including methods and parameters.
Focus on: Washington’s climate policies and fuel prices
On Jan. 1, 2023, two new Washington laws designed to reduce greenhouse gas emissions took effect: the Clean Fuel Standard (CFS) and the Climate Commitment Act (CCA).
Goldendale Environmental Impact Statement (EIS) summary
Ecology released the final Environmental Impact Statement (EIS) for the Goldendale Energy Storage Project. The EIS examines significant adverse environmental impacts if the project is built. The document also identifies if those impacts may be reduced or eliminated through mitigation measures.
Story Maps: Sediment Quality in Puget Sound
This series of colorful, interactive story maps describes the work of our Marine Sediment Monitoring Team. These scientists conduct long-term monitoring to assess and determine change over time in the condition of Puget Sound sediments and the animals that live in them.
Accessibility & the Americans with Disabilities Act ADA
We are committed to providing information and services that are accessible to people with disabilities. We provide accommodations for the public, Ecology employees, and job applicants.
Cleanup project: Clean Earth Burlington
Clean Earth/Burlington, located within the Port of Camas in Washougal, WA, is currently undergoing a formal dangerous waste cleanup process at their site. The company is publicly known as Clean Earth, legally named Burlington Environmental, and is a subsidiary of PSC Environmental Services.
Cleanup site: Olalla Landfill
Kitsap County Public Works Solid Waste Division, Kitsap Public Health District, and Ecology are working together to complete the first Five-Year Periodic Review for Olalla Landfill.
Burlington Environmental-Georgetown, Seattle cleanup site
Burlington Environmental-Georgetown in Seattle consists of two sites, one to the east of Fourth Avenue South (known as “East of 4th”), and one to the west (known as “West of 4th”)
Data model - CO2SYS Version 24
A calculator for the CO2 system in seawater written in Excel/VBA. This Excel/VBA version included in the comparison of ten packages by Orr et al. (2015)