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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Underground injection control well registration requirements & information

Get Underground Injection Control (UIC) well registration requirements and information.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/underground-injection-control-program/uic-registration-requirements-information

Heat pump & air conditioning return flow UIC wells

Groundwater circulated through a heat pump/air conditioning (HAC) system has to meet requirements.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/underground-injection-control-program/heat-pump-air-conditioning-return-flow-wells

Underground Injection Control (UIC) program: Chapter 173-218 WAC

We regulate discharge of injection well fluids to protect against groundwater contamination.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/underground-injection-control-program

Online UIC injection well registration

We provide online access to register new and existing underground injection control (UIC) wells.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/underground-injection-control-program/register-uic-wells-online

Hydrologic performance of bioretention

Study of the oldest bioretention facilities to evaluate infiltration performance.

https://ecology.wa.gov/regulations-permits/reporting-requirements/stormwater-monitoring/stormwater-action-monitoring/sam-effectiveness-studies/bioretention-infiltration

Sprague Lake Community Mtg

Sprague Lake Hydrology Analysis Community Kick-Off Meeting November 22, 2022

https://ecology.wa.gov/sprague-lake

KeepingYourBeachClean

An infographic with tips on how to keep your beach clean.

https://ecology.wa.gov/beach-infographic-print-version

ROD ROD BENT 17-03 July 17 2018

A Report of Decision from the Benton County Water Conservancy Board

https://ecology.wa.gov/rod-rod-bent-17-03-july-17-2018

7Q10 for High Flows on the Columbia/Snake Rivers

Guidelines for arriving at 7Q10 for dissolved gas standards.

https://ecology.wa.gov/7q10forhighflows

2020-21 Project Awards: Chehalis River Basin Aquatic Species Restoration Plan

Descriptive list of state grant awards for aquatic habitat restoration projects in the Chehalis Basin

https://ecology.wa.gov/2020-21-asrp-project-list

Chehalis flood reduction project draft EIS presentation

Presentation of draft EIS for Chehalis Basin flood-reduction project

https://ecology.wa.gov/chehalis-draft-sepa-eis-presentation

ECY to Pend Oreille County regarding SEPA lead request

ECY response to Pend Oreille County Commissioners' letter requesting Ecology take the lead agency role in Environmental review of PacWest Silicon’s proposal

https://ecology.wa.gov/ecy-to-po-commissoners_lead-ag_july2018