Research & Data

Use this portal to filter and search for all of our scientific information.

Ecology provides the high-quality science that is the foundation of Washington state environmental policy. Our monitoring, assessment, and modeling services provide a data-rich understanding of our state’s land, air, and water. We provide access to that data through reports, databases, maps and user-friendly online tools.

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Order Remanding 2020 Section 401 Rule with Vacatur

Order from United State District Court Northern District of California that remands and vacates the 2020 Section 401 rule under the Clean Water Act.

https://ecology.wa.gov/cwa-401-order-remanding-with-vacatur

QA planning process for NEP grantees

Printable and accessible PDF version of a flowchart showing the approval process for Quality Assurance Project Plans for National Estuary Program grantees.

https://ecology.wa.gov/nepqaflowchart

Requirements for 401 Water Quality Certification Request

This table describes the required elements, documents, and actions to submit your certification request to the Department of Ecology.

https://ecology.wa.gov/certification-requirements-table

Draft 2021-2025 Section 309 Assessment & Strategy

Every five years, states and territories are encouraged to conduct self-assessments of their coastal management programs to determine problems and enhancement opportunities within each of the nine enhancement areas—and to assess the effectiveness of existing management efforts to address identified problems.

https://ecology.wa.gov/washington-coastal-zone-management-section-309-ass

Applicant Prep Tool for Water Quality Combined Funding Applications in EAGL

This is the Applicant Prep Tool document for people applying for funding via a Water Quality Combined funding program application in EAGL.

https://ecology.wa.gov/wqc-eagl-applicant-prep-tool

Applicant Prep Tool for Water Quality Stormwater

This is the Applicant Prep Tool document for people applying for funding via a Water Quality Combined (specifically stormwater projects) funding program application in EAGL.

https://ecology.wa.gov/wqc-eagl-applicant-prep-tool-for-stormwater

Water Quality Combined funding program - Recipient Training - Resources List

For funding recipients of our Water Quality Combined Funding Program, this is the resources list for the Recipient Training workshop.

https://ecology.wa.gov/wqc-recipient-training-resource-list

Water Quality Combined funding program State Fiscal Year 2023 Applicant Workshop Notice

This is the announcement and detailed information for the Water Quality Combined funding program's State Fiscal Year 2023 Applicant Workshop for anyone wanting to apply for loan or grant funding from the Water Quality Combined funding program in this next application cycle.

https://ecology.wa.gov/wqc-fy2019-applicant-workshop-notice

Habitat monitoring

We collect data on the health of environmental systems that support plant and animal life.

https://ecology.wa.gov/research-data/monitoring-assessment/river-stream-monitoring/habitat-monitoring

Modeling the environment

Computer models mathematically represent part of the environment to predict potential changes.

https://ecology.wa.gov/research-data/data-resources/models-spreadsheets/modeling-the-environment

Wastewater testing

Whole effluent toxicity testing ensures wastewater does not harm aquatic life.

https://ecology.wa.gov/research-data/monitoring-assessment/wastewater-testing

Marine water & sediment monitoring

We conduct water and sediment long-term monitoring to identify ecosystem changes.

https://ecology.wa.gov/research-data/monitoring-assessment/puget-sound-and-marine-monitoring

Freshwater fish contaminant monitoring

We analyze freshwater fish for various toxic chemicals.

https://ecology.wa.gov/research-data/monitoring-assessment/toxics-monitoring/freshwater-fish-contaminant-monitoring

Models and tools for water quality improvement

We use models to predict water quality changes to help find strategies to address pollution.

https://ecology.wa.gov/research-data/data-resources/models-spreadsheets/modeling-the-environment/models-tools-for-tmdls

Freshwater Aquatic Plants Manual

An illustrated guide to some of the more common freshwater aquatic plants found in Washington, such as hydrilla, milfoil, pondweeds, bladderworts, and more.

https://ecology.wa.gov/freshwater-aquatic-plants

Eyes Over Puget Sound

We use aerial photos and data from our monitoring stations and ferries to report on Puget Sound.

https://ecology.wa.gov/research-data/monitoring-assessment/puget-sound-and-marine-monitoring/eyes-over-puget-sound

Models & spreadsheets

Computer models predict changes and spreadsheets calculate. We offer these tools to the public.

https://ecology.wa.gov/research-data/data-resources/models-spreadsheets

Monitoring watersheds for salmonids

Does salmon habitat restoration work? Our Intensively Monitored Watersheds program aims to find out.

https://ecology.wa.gov/research-data/monitoring-assessment/river-stream-monitoring/intensively-monitored-watersheds

River & stream water quality index

The Freshwater Quality Index can help you learn about river and stream health.

https://ecology.wa.gov/research-data/monitoring-assessment/river-stream-monitoring/water-quality-monitoring/river-stream-water-quality-index

Stream biological monitoring

We evaluate the health of rivers and streams by studying multiple aquatic communities.

https://ecology.wa.gov/research-data/monitoring-assessment/river-stream-monitoring/habitat-monitoring/stream-biological-monitoring