Technical Data

Many stakeholders in the Clackamas River Watershed monitor water quality to meet regulatory requirements and to better understand the health of the watershed.  Below are links to reports, studies, and technical data for the basin.

 NEW – USGS – Reservoir and Riverine Sources of Cyanotoxin in Oregon 2025 Paper

CRWP Pollutant Load Modeling Tool (PLMT)

The purpose of the Clackamas River Watershed Pollutant Modeling Tool is to provide an interactive framework for estimating the relative impacts of land use and best management practices on drinking water source quality in various parts of the watershed. This tool can be used to assess baseline conditions and consider scenarios for land management and pollution reduction in accordance with the Clackamas River Watershed Drinking Water Protection and Source Water Assessment Plans.  To access the tool go to https://crwp-pollutant-load-model.azurewebsites.net/

Clackamas River Watershed Agricultural Water Rights Project

The CRWP worked with a Graduate student at Portland State to understand how many agricultural water rights are in the Clackamas River watershed, where they are and how large they may be, and if there are opportunities to work with these landowners under Oregon water law to put water back instream to increase river flows.  Check out the project Storymap here.

Clackamas River Basin Water Temperature Study

Year one data: Clackamas Water temp Study year 1 data logs master spreadsheet
Project website 
Effects of climate change on stream temperature and salmonid habitats in a Cascades river basin – Journal of Environment Management 

Scales of Connectivity within Stream Temperature Networks of the Clackamas River Basin, Oregon (2020-22) paper click here

CRWP Post Riverside Fire WQ monitoring
CRWP Post Fire Testing 2020-2022

Assess Wildfire Risk to Municipal Drinking Water
CRWP worked with the USFS Pacific NW Research Station to Assess Wildfire Risk to Municipal Drinking Water Sources.  Click here to go to see a summary of the project.  To see the results of this modeling work – see the Strategic Planning for Water, Infrastructure, and Aquatic Biota After Wildfire – Riverside Fire, Clackamas, Oregon storymap.

Basic Water Quality Characteristics

Clackamas River Basin Council
WATER QUALITY MONITORING REPORT – 2011
WATER QUALITY MONITORING REPORT – 2013
WATER QUALITY MONITORING REPORT – 2014

Oregon Department of Environmental Quality
AMBIENT WATER QUALITY MONITORING SYSTEM DATABASE

US Environmental Protection Agency
Water Quality Data

US Geological Survey
USGS Clackamas River Water Quality Monitoring Stations

Eagle Creek Water Quality
Eagle Creek water quality Bugni 2020 study final
Eagle Cree WQ Data Charts of results

Microplastic Study (2021)

Talbot_CR_Pres – Microplastic Study
Microplastic_Report_CRWP
Environmental Pollution – Microplastics in freshwater: A global review of factors affecting spatial and temporal variations 

Pesticides Studies and Reports

OR Department of Agriculture
GENERAL INFORMATION ON PESTICIDES AND WATER QUALITY

US Geological Survey
2005 REPORT ON PESTICIDES IN THE LOWER CLACKAMAS BASIN

Pesticide Stewardship Partnership (PSP)
Pesticide Stewardshiop Partnership webpage
PSP Biennium Report 2019-21
PSP Biennium Fact Sheet 2019-21
Pesticide Stewardship Partners Data Viewer https://rstudioconnect.deq.state.or.us/PSP-Data-Viewer/

Clackamas River Wate Providers – Clackamas Soil & Water Conservation
Pesticide Reduction Video Series

Macroinvertebrates Studies and Reports

Clackamas River Water Providers
Lower Clackamas River Basin Macroinvertebrate Monitoring Plan
2023 LOWER CLACKAMAS RIVER MACROINVERTEBRATE ASSESSMENT
2022 Lower Clackamas Macroinvertebrate Assessment
2019 Lower Clackamas River Macroinvertebrate Assessment
2018 Lower Clackamas River Macrionvertebrare Assessmet
MACROINVERTEBRATE COMMUNITY CONDITIONS of the LOWER CLACKAMAS RIVER BASIN 1997-2016
Lower Clackamas River Macroinvertebrate Assessment (December 2013) 
Lower Clackamas River Macroinvertebrate Assessment (2014)
2013-2015 Lower Clackamas River Macroinvertebrate Assessment

Clackamas Soil and Water Conservation District
2018 CSWCD Stream Benthic Macros Assessment
2016-CSWCD Stream Benthic Macro Assessment
2012 CSWCD Stream Benthic Macro Assessment

Clackamas River Basin Council
2013 CRBC macro data
2011 CRBC Macro data

Groundwater Information

• CRWP 2020 Groundwater Baseflow Study – CRWP Memo 2020 and Presentation.
• Ground Water and Climate
• Clackamas_Geomorphology_DrGrantOSU
• Groundwater in northern Clackamas County

Summary Reports

NRCS – National Water Quality Initiative Clackamas Source Water Assessment Plan (September 2022)
Final_CRWP_Source Water Assessment Plan Sept 2022
Source Water Assessment Plan Summary Presentation.  NWQI- CTWG presentation Sept 2022

OR Department of Environmental Quality
CLACKAMAS SUBBASIN WATER QUALITY OVERVIEW

OR Department of Environmental Quality
OREGON’S 2022 INTEGRATED REPORT

US Geological Survey
STUDY OF ORGANIC COMPOUNDS IN CLACKAMAS RIVER WATER

DEQ Source Water Assessment
Clackamas River Public Water Systems

Annual Drinking Water Quality Reports

City of Estacada  WATER QUALITY REPORTS

City of Gladstone CONSUMER CONFIDENCE REPORTS

City of Lake Oswego WATER QUALITY REPORTS

City of Oregon City WATER QUALITY REPORTS

City of West Linn WATER QUALITY REPORTS

Clackamas River Water WATER QUALITY REPORTS

Oak Lodge Water District WATER QUALITY REPORTS

Sunrise Water Authority WATER QUALITY REPORTS

Action Plans

Clackamas River Basin Council
BASIN ACTION PLAN

Clackamas River Water Providers
DRINKING WATER PROTECTION PLAN

OR Department of Agriculture
AGRICULTURAL WATER QUALITY MANAGEMENT PLANS

OR Department of Fish and Wildlife
UPPER WILLAMETTE RIVER CONSERVATION AND RECOVERY PLAN

Water Environment Services
WATERSHED HEALTH ACTION PLANS