| Title (link to summary) |
Number |
Date (released or updated) |
| Quality Assurance Project Plan: Potential Impacts from Mercury Used in Historic Gold Mining on Six Rivers and Streams | 09-03-123 | August 2009 |
| PBT Trend Monitoring: Lead in Suspended Particulate Matter, 2008 | 09-03-020 | May 2009 |
| Washington State Toxics Monitoring Program: Trend Monitoring for Chlorinated Pesticides, PCBs, and PBDEs in Washington Rivers and Lakes, 2007 | 09-03-013 | March 2009 |
| 2008 Report to the Legislature - Progress on Watershed Planning and Setting Instream Flows | 08-06-027 | December 2008 |
| History of Mercury in Selected Washington Lakes Determined from Age-Dated Sediment Cores: 2007 Sampling Results | 08-03-012 | May 2008 |
| Washington State Toxics Monitoring Program: Contaminants in Fish Tissue from Freshwater Environments in 2006 | 08-03-002 | February 2008 |
| Similkameen River and Palmer Lake Investigation of Arsenic in Fish Tissue | 07-03-034 | June 2007 |
| Quality Assurance Project Plan: Similkameen River and Palmer Lake Investigation of Arsenic in Fish Tissue | 06-03-118 | December 2006 |
| Lower Okanogan DDT PCB Detailed Implementation Plan: Water Quality Implementation Plan | 06-10-031 | May 2006 |
| Progress on Watershed Planning and Setting Instream Flows | 05-11-038 | December 2005 |
| Lower Similkameen River Arsenic Total Maximum Daily Load (Water Cleanup Plan): Detailed Implementation Plan | 05-10-074 | October 2005 |
| Effects of Small-Scale Gold Dredging on Arsenic, Copper, Lead, and Zinc Concentrations in the Similkameen River | 05-03-007 | March 2005 |
| Lower Okanogan River Basin DDT and PCBs Total Maximum Daily Load: Submittal Report | 04-10-043 | February 2005 |
| Washington State Toxics Monitoring Program: Toxic Contaminants in Fish Tissue and Surface Water in Freshwater Environments, 2002 | 04-03-040 | September 2004 |
| Quality Assurance Project Plan: Effects of Small-Scale Gold Dredging on Metals Concentrations in the Similkameen River | 04-03-108 | July 2004 |
| Lower Similkameen River Arsenic Total Maximum Daily Load: Submittal Report | 03-10-074 | February 2004 |
| TMDL Technical Assessment of DDT and PCBs in the Lower Okanogan River Basin | 03-03-013 | July 2003 |
| Focus on Public Involvement with Your Community′s Water Quality | 03-10-067 | July 2003 |
| Mercury in Edible Fish Tissue and Sediments from Selected Lakes and Rivers of Washington State | 03-03-026 | June 2003 |
| Investigation of Background Inorganic and Organic Arsenic in Four Washington Lakes | 03-03-024 | May 2003 |
| Washington State Toxics Monitoring Program: Toxic Contaminants in Fish Tissue and Surface Water in Freshwater Environments, 2001 | 03-03-012 | March 2003 |
| Arsenic Concentrations in Three Palmer Lake Sediment Samples | 02-03-058 | December 2002 |
| A Total Maximum Daily Load Evaluation for Arsenic in the Similkameen River | 02-03-044 | November 2002 |
| Quality Assurance Project Plan: Screening Survey of Mercury Levels in Edible Fish Tissue from Selected Lakes and Rivers of Washington State | 02-03-080 | October 2002 |
| Results and Recommendations from Monitoring Arsenic Levels in 303(d) Listed Rivers in Washington | 02-03-045 | October 2002 |
| Quality Assurance Project Plan: TMDL Technical Assessment of DDT and PCBs in the Okanogan River | 02-03-070 | August 2002 |
| River and Stream Ambient Monitoring Report for Water Year 2000 | 01-03-042 | December 2001 |
| Periodic Dam Safety Inspection Report: Leader Lake Dams | 01-11-008 | July 2001 |
| Review of Sediment Quality Data for the Similkameen River | 00-03-027 | July 2000 |
| Water Quality Assessments of Selected Lakes within Washington State: 1997 | 00-03-009 | March 2000 |
| Screening Level Investigation of Water and Sediment Quality of Creeks in Ten Eastern Washington Mining Districts, with Emphasis on Metals | 00-03-004 | January 2000 |
| Groundwater Data Compilation for the Okanogan Watershed | 99-342 | October 1999 |
| Briefing Paper for the Okanogan Watershed, WRIAs 48, 49, 50 | 99-340 | October 1999 |
| River and Stream Ambient Monitoring Report for Water Year 1997 | 99-332 | August 1999 |
| Dredging Simulation Test on Similkameen River Sediments | 99-318 | April 1999 |
| DDT in Osoyoos Lake Fish | 98-337 | December 1998 |
| River and Stream Ambient Monitoring Report for Wateryear 1996 | 98-317 | June 1998 |
| Aquatic Plants Technical Assistance Program 1997 Activity Report | 98-311 | April 1998 |
| Survey of Metals Concentrations in the Similkameen River. Memo to Jim Milton, Central Regional Office, December 31, 1997. | 97-e10 | December 1997 |
| DDT Sources to the Okanogan River and Lake Osoyoos. Memo to Jim Milton, Central Regional Office. | 97-e09 | December 1997 |
| Water Quality Assessments of Selected Lakes within Washington State - 1994 | 97-307 | February 1997 |
| Washington State Pesticide Monitoring Program: 1994 Fish Tissue and Sediment Sampling Report | 96-352 | December 1996 |
| River and Stream Ambient Monitoring Report for Wateryear 1995 | 96-355 | December 1996 |
| Aquatic Plants Technical Assistance Program 1995 Activity Report | 96-332 | July 1996 |
| Lake Water Quality Assessment Program, 1993 | 96-304 | 1996 |
| Progress Report on Survey of Metals Concentrations in the Similkameen River. Memo to Jim Milton. | 95-e07 | November 1995 |
| River and Stream Ambient Monitoring Report for Wateryear 1994 | 95-349 | September 1995 |
| Aquatic Plants Technical Assistance Implementation Plan - 1995 Field Season | 95-334 | July 1995 |
| Metals Concentrations in the 1994 WSPMP Samples, Memo to Larry Goldstein | 95-e06 | June 1995 |
| Aquatic Plants Technical Assistance 1994 Activity Report | 95-331 | June 1995 |
| 1994 Statewide Water Quality Assessment Lakes Chapter - Companion Document to WA State 305(b) | 95-311 | February 1995 |
| Okanogan Watershed Initial Assessment | 95-014 | 1995 |
| Okanogan River Watershed Assessment Summary | 95-162 | 1995 |
| Washington State Pesticide Monitoring Program: Reconnaissance Sampling of Fish Tissue and Sediments (1992) | 94-194 | December 1994 |
| River and Stream Ambient Monitoring Report for Wateryear 1993 | 94-158 | September 1994 |
| Freshwater Ambient Monitoring Report for Wateryear 1992 | 94-70 | May 1994 |
| Lake Water Quality Assessment Program, 1991-1992 | 94-46 | April 1994 |
| Freshwater Ambient Monitoring Report for Wateryear 1991 | 93-75 | September 1993 |
| Washington State Pesticide Monitoring Program: Reconnaissance Sampling of Surface Waters (1992) | 93-e09 | March 1993 |
| Lake Water Quality Assessment Project, 1990 | 92-124 | 1993 |
| Effectiveness of Washington's Forest Practice Riparian Management Zone Regulations for Protection of Stream Temperature | 92-64 | July 1992 |
| Lake Water Quality Assessment Project, 1989 | 91-60 | November 1991 |
| Water Quality Survey of 15 "Volunteer-Monitored" Lakes in Washington State | 91-e06 | July 1991 |
| Texaco Incorporated's Anacortes Refinery | 90-e68 | June 1990 |
| 1989 Lakes and Reservoir Water Quality Assessment Program: Survey of Chemical Contaminants in Ten Washington Lakes | 90-e35 | May 1990 |
| Water Quality Survey of 25 Citizen-Volunteer Lakes from Washington State | 90-e03 | March 1990 |
| Okanogan Wastewater Treatment Plant Receiving Water Survey, October 1988 | 90-e06 | 1990 |
| Okanogan Wastewater Treatment Plant Class II Inspection, October 18-19, 1988 | 90-e66 | 1990 |
| Conconully Publicly Owned Treatment Works Limited Class II Inspection. Memo to John Hodgson. | 87-e02 | 1987 |
| Basic Water Monitoring Program: Fish Tissue and Sediment Sampling for 1984. | 85-7 | November 1985 |
| Buck Mountain DNR Mineral Well. Memo to John Hodgson. | 83-e34 | August 1983 |
| Omak Ground Water Contamination. Memo to John Hodgson. | 81-e04 | February 1981 |
| Receiving Water Studies at Omak and Oroville Sewage treatment Plants, September 1979. Memo to John Hodgson. | 80-e13 | February 1980 |
| Omak STP Class II Inspection. Memo to John Hodgson. | 79-e24 | November 1979 |
| Brester Well contamination. Memo to John Hodgson. | 79-e02 | 1979 |
| Effects on Receiving Waters of Sewage Wastes Generated by Tonasket, Oroville, Omak, Okanogan, and Conconully in the Okanogan Basin. Project Report DOE PR-3. | 78-e19 | October 1978 |
| Brewster Survey. Memo to Dick Cunningham. | 78-e02 | August 1978 |
| 2,4-D Herbicide Application in Lake Osoyoos. Memo to Dick Thayer. | 77-e12 | 1977 |
| Water Resources Management Program, Basin Program Series 3: Okanogan River Basin | 76-11-006 | July 1976 |
| Geohydrologic Reconnaissance: Monse Area, Okanogan County, Washington | oftr 72-02 | December 1972 |
| The Geohydrology of the Sidney-Molson Lakes Area, Okanogan County, Washington | oftr 72-01 | May 1972 |
| Barn Lot Waste Discharge to a Tributary of Omak Lake. Memo to Tom Haggerty- Warren Myers. | 71-e14 | April 1971 |
| Geohydrologic Evaluation Aeneas Lake - Horse Springs Coulee Area, Okanogan County, Washington | OFTR 70-03 | 1970 |
| A Preliminary Report on the Geology and Ground-Water Resources of the Duck Lake Area, Okanogan County, Washington | OFTR 61-01 | 1961 |
