Regulations & Permits

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

We oversee many state and federal laws designed to protect Washington's land, air, and water. See our laws, rules, & rulemaking page for more information about our current rules and rulemaking.

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SEPA Handbook 2018

General SEPA Guidance in a download format

https://ecology.wa.gov/2018-sepa-handbook

2011 MTCATPH Excel Spreadsheet's Troubleshooting Guide

Troubleshooting guide with operating tips for common installation problems associated with compatibility with MS EXCEL 2000, 2003, 2007, 2010 versions.

https://ecology.wa.gov/2011mtcatphtroubleshooting

Tools for cleaning up contaminated sites

We have online tools and statistical packages to help you clean up contaminated sites.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/contamination-cleanup-tools

Concentrated Animal Feeding Operation General Permit

Permit for operations with large numbers of livestock for long periods of time.

https://ecology.wa.gov/regulations-permits/permits-certifications/concentrated-animal-feeding-operation

Well construction & licensing system

Search for notices of intent, licensed drillers, or drilling companies.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/well-construction-licensing-system

Tools for cleaning up petroleum contaminated sites

We have online tools and guidance to help you clean up petroleum-contaminated sites.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/contamination-cleanup-tools/petroleum-cleanup-tools

Pollution prevention (P2) plan

Some businesses are required to submit a pollution prevention plan to reduce hazardous substance use.

https://ecology.wa.gov/regulations-permits/reporting-requirements/dangerous-waste-reporting-requirements/pollution-prevention-plan

Well report (log) viewer

Search for wells and view availabile well reports (logs).

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/well-report-gateway

Cleaning up contamination with model remedies

Model remedies are ways to clean up routine, low-risk contaminated sites under MTCA.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/mtca-model-remedies

Western Washington Hydrology Model

Western WA Hydrology Model models most hydrologic conditions for stormwater control and design.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/stormwater-permittee-guidance-resources/stormwater-manuals/western-washington-hydrology-model

Water rights search

Water right records can be searched on a map-based water right database.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/water-rights-search

SEPA guidance

Overview, purpose, and details of SEPA review process.

https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance

SEPA training

We provide SEPA training sessions and other presentations.

https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-workshops-training

SEPA document templates (forms)

SEPA checklist with guidance plus other suggested templates for SEPA notices.

https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-document-templates

SEPA checklist guidance

We provide information about each SEPA checklist question.

https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist-guidance

SEPA checklist guidance, Section B: Water

Guidance to complete Water section for Part B of SEPA environmental checklist.

https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist-guidance/sepa-checklist-section-b-environmental-elements/environmental-elements-3-water

SEPA checklist guidance, Section B: Light & glare

Guidance for completing Light & glare section in Part B of the SEPA environmental checklist.

https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist-guidance/sepa-checklist-section-b-environmental-elements/environmental-elements-11-light-glare

SEPA Supplemental Orca Checklist Guidance

This guidance helps applicants complete the SEPA Supplemental Orca Checklist.

https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist-guidance/sepa-checklist-supplemental-orca-checklist-guidanc

Overview of Washington State Environmental Policy Act (SEPA)

SEPA is the environmental review process for public agencies in Washington.

https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/basic-overview

Episodic generation of dangerous waste

Manage waste as an episodic event to maintain your current generator category.

https://ecology.wa.gov/regulations-permits/reporting-requirements/dangerous-waste-reporting-requirements/notification-of-dangerous-waste/episodic-generation