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.
Policies and guidance for site cleanups
Policies and guidance interpret the MTCA cleanup law and help you clean up contaminated sites.
https://ecology.wa.gov/regulations-permits/plans-policies/toxics-cleanup-policies
What to do if you spill oil or hazardous substances
Spills to water must be reported immediately to help reduce impacts to the environment.
https://ecology.wa.gov/regulations-permits/reporting-requirements/spills-if-you-spill
Common cleanup situations for homeowners and small businesses
Learn about common cleanup situations likely to affect home and small business owners.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/guidance-for-residential-cleanups/common-cleanup-situations-for-homeowners-small-b
FAQ: Evaluate options to clean up homes and small businesses
These FAQs help homeowners and small businesses evaluate cleanup options and complete cleanup work.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/guidance-for-residential-cleanups/evaluation-cleanup-for-homeowners-small-busine
FAQ: Investigate and report toxic releases
FAQs to help homeowners and small businesses investigate and report toxic releases.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/guidance-for-residential-cleanups/investigating-reporting-toxic-releases
Underground storage tank closures
Important information about closing your underground storage tanks.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/ust-owner-and-operator-resources/underground-storage-tank-closures
Property inspection checklist
Before buying property, use the property inspection checklist to complete an onsite inspection.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/guidance-for-residential-cleanups/property-inspection-checklist
Records search checklist
Before buying property, use the records search checklist for due diligence and to know past uses.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/guidance-for-residential-cleanups/records-search-checklist
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/clean-up-petroleum-contamination
Cleanup Levels and Risk Calculation (CLARC)
CLARC's resources help you set contaminated site cleanup levels that comply with Washington law.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/contamination-clean-up-tools/clarc
Sand & Gravel Permit guidance
Guidance to implement your Sand & Gravel General Permit.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/stormwater-permittee-guidance-resources/sand-and-gravel-permit-guidance
CLARC data tables and other technical information
Download CLARC data tables for information that helps site managers determine cleanup levels.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/contamination-clean-up-tools/clarc/data-tables
CLARC glossary
A glossary for terms and acronyms in CLARC's resource pages.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/contamination-clean-up-tools/clarc/glossary
CLARC guidance
Use these guidance documents in combination with CLARC to establish cleanup levels.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/contamination-clean-up-tools/clarc/guidance
Online tool: Cleanup and Tank Search
Find information on contamination cleanup sites and underground storage tanks.
https://ecology.wa.gov/online-tool-cleanup-and-tank-search
Brownfields funding opportunities in Washington State
Download a comprehensive list of federal and state funding and technical assistance opportunities for redeveloping brownfields in Washington.
https://ecology.wa.gov/brownfieldsfundingoverview
Email list: Brownfields
Brownfields are abandoned or underutilized properties that may have environmental contamination. Join our email list to learn more about funding and educational opportunities to help redevelop brownfields into community assets.
https://ecology.wa.gov/email-list-brownfields
Requirements for submitting cleanup site data
You must submit your lab data electronically through EIM.
https://ecology.wa.gov/regulations-permits/reporting-requirements/data-submittal-requirements-for-cleanup-sites
Checklists and templates for site investigation reports and cleanup plans
Get help preparing remedial investigations, feasibility studies, and cleanup action plans.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/cleanup-report-checklists-and-templates
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-clean-up-tools
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