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Matthew Uychutin (Former Employee)

Science and Products

Pollen samples from various plants collected from hedgerows

Organic Chemistry Research Core Technology Team

About the Research The Organic Chemistry Research Laboratory Core Technology Team (CTT) as part of the Environmental Health Program focuses on the identification and quantitation of trace level organic contaminants (with a special focus on pesticides) in a wide array of environmental media (water, sediment/soil, plants, biota, etc.).
By
Ecosystems Mission Area, Contaminant Biology, Environmental Health Program, Toxic Substances Hydrology
Organic Chemistry Research Core Technology Team

Organic Chemistry Research Core Technology Team

About the Research The Organic Chemistry Research Laboratory Core Technology Team (CTT) as part of the Environmental Health Program focuses on the identification and quantitation of trace level organic contaminants (with a special focus on pesticides) in a wide array of environmental media (water, sediment/soil, plants, biota, etc.).
Learn More
A yellow crop duster lets fall a cloud of spray on a cotton crop

Pesticide Fate Research Group (PFRG)

Pesticides are used in both agricultural and urban settings to manage unwanted plants, insects, fungi, and other pests. However, these substances and their breakdown products can move beyond their intended application sites through various means, ending up in areas where they weren't meant to be. This movement can happen via the air, through water (both surface and groundwater), and by sticking to...
By
California Water Science Center, Organic Chemistry Research Laboratory
Pesticide Fate Research Group (PFRG)

Pesticide Fate Research Group (PFRG)

Pesticides are used in both agricultural and urban settings to manage unwanted plants, insects, fungi, and other pests. However, these substances and their breakdown products can move beyond their intended application sites through various means, ending up in areas where they weren't meant to be. This movement can happen via the air, through water (both surface and groundwater), and by sticking to...
Learn More

Pesticide Exposure in Wet Meadows of Southeast Idaho, 2025 Pesticide Exposure in Wet Meadows of Southeast Idaho, 2025

Wet meadow habitats in southeast Idaho, which are important areas for wetland-dependent wildlife, are managed by four National Wildlife Refuges (NWR). Threats to this important, but regionally declining habitat include pesticide drift from adjacent and nearby lands. In this study, four NWRs, Camas, Minidoka, Bear Lake, and Grays Lake, are investigated for the presence of pesticides...
By
California Water Science Center

Pesticide concentrations in moths and other insects collected from the United States and Canada, 2022 to 2024 Pesticide concentrations in moths and other insects collected from the United States and Canada, 2022 to 2024

Both aquatic and terrestrial insects can undergo complex evolutionary phases throughout their lifespan. Insects in a larval phase can accumulate and retain some chemicals, such as pesticides, throughout their various life cycles. Mature insects are often more mobile than their younger counterparts, making them able to transport pesticides over further distances. Insectivores (animals...
By
California Water Science Center

Concurrent Occurrence of Pesticides and Per- and Polyfluoroalkyl Substances (PFAS) in Agricultural Streams in California, USA Concurrent Occurrence of Pesticides and Per- and Polyfluoroalkyl Substances (PFAS) in Agricultural Streams in California, USA

Per-and polyfluoroalkyl substances (PFAS) are frequently found in streams, with most research focusing on urban sources of PFAS to surface water (e.g., firefighting foams, industrial releases, and wastewater treatment plant discharges). Pesticide applications are an under-investigated source of PFAS to streams in both agricultural and urban areas. There are few studies that analyze the...
By
California Water Science Center

Organic Contaminants at Trespass Cannabis Grows on Federal Land in California, USA Organic Contaminants at Trespass Cannabis Grows on Federal Land in California, USA

Despite the legalization of recreational cannabis in California, illegal cultivation persists, particularly on public lands (trespass grows). These operations often divert water unlawfully and apply unauthorized chemical fertilizers and pesticides. This dataset reports the presence, and in some cases concentrations, of persistent chemicals in soil, water, and sediment in nearby streams...
By
California Water Science Center

Pesticide Concentrations Measured in Zooplankton Samples Collected from the Sacramento River, Yolo Bypass, and Cache Slough Region, California, 2024 Pesticide Concentrations Measured in Zooplankton Samples Collected from the Sacramento River, Yolo Bypass, and Cache Slough Region, California, 2024

Zooplankton samples were collected in the summer/fall of 2024 at multiple sites in the Sacramento River, Yolo Bypass, and Cache Slough Region of California and analyzed for a suite of 160 current-use pesticides and pesticide degradates by the U.S. Geological Survey Organic Chemistry Research Laboratory. Samples were collected at two sites in the Bypass, at a comparison site on the...
By
California Water Science Center

6PPD-quinone concentrations in the Sacramento-San Joaquin Delta, California, 2018-2024 6PPD-quinone concentrations in the Sacramento-San Joaquin Delta, California, 2018-2024

The Sacramento-San Joaquin Delta is a crucial river delta that supplies a significant portion of California's freshwater for agricultural and residential use and serves as critical habitat for numerous state and federally listed species of concern. In several areas, urban stormwater drains discharge directly into the Delta. 6PPD-quinone (6PPD-Q, 2-anilo-5-[(4-methylpentan-2- yl)amino...
By
California Water Science Center

Pesticide Concentrations Measured in Zooplankton Samples Collected from the Sacramento River, Yolo Bypass, and Cache Slough Region, California, 2022 and 2023 Pesticide Concentrations Measured in Zooplankton Samples Collected from the Sacramento River, Yolo Bypass, and Cache Slough Region, California, 2022 and 2023

Zooplankton samples were collected in the summer/fall of 2022 and 2023 at multiple sites in the Sacramento River, Yolo Bypass, and Cache Slough Region of California and analyzed for a suite of 160 current-use pesticides and pesticide degradates by the U.S. Geological Survey Organic Chemistry Research Laboratory. In 2022 samples were collected at two sites in the Bypass and at a...
By
California Water Science Center

Pesticide Concentrations Measured in Zooplankton Samples Collected from the Sacramento River and Yolo Bypass, California, 2021 Pesticide Concentrations Measured in Zooplankton Samples Collected from the Sacramento River and Yolo Bypass, California, 2021

Zooplankton samples were collected at one site upstream of the Yolo Bypass in Northern California, three sites within the Bypass, and at a comparison site on the Sacramento River below the city of Sacramento and analyzed for a large suite of current-use pesticides and degradates. Samples were collected every two weeks from early August 2021 to mid-October 2021. Samples were collected by...
By
California Water Science Center

Concentrations of pesticides in silicone bands as passive samplers and sediment in Pinnacles National Park and Bureau of Land Management lands in San Benito County, California, 2019-2021 Concentrations of pesticides in silicone bands as passive samplers and sediment in Pinnacles National Park and Bureau of Land Management lands in San Benito County, California, 2019-2021

To better understand the potential pesticide exposure, samples were collected from locations along two creeks in Pinnacles National Park and four creeks in nearby Bureau of Land Management (BLM) lands. Silicone bands were used as passive sampling devices (PSD) staked in the creek and above in the air (above the water line). Sampling was conducted in the summer from 2019 to 2021. PSDs...
By
California Water Science Center

Pesticide detections in streams throughout the foothills of the Sierra Nevada range using passive samplers from 2017 to 2019 Pesticide detections in streams throughout the foothills of the Sierra Nevada range using passive samplers from 2017 to 2019

This dataset was produced from analyzing Affinisep SDB-RPS, Affinisep HLB, and Restek Resprep C18 disks that were deployed with the use of Chemcatcher� passive sampling devices. Silicone bands were also deployed and used for exploring economical methods of sampling for pesticides in surface water. Sampling assemblies were deployed in streams throughout the foothills of the Sierra Nevada...
By
California Water Science Center

Assessing pesticide application contributions of per- and polyfluoroalkyl substances (PFAS) in agricultural streams Assessing pesticide application contributions of per- and polyfluoroalkyl substances (PFAS) in agricultural streams

Research has documented per-and polyfluoroalkyl substances (PFAS) to be prevalent in streams impacted by urban sources; less is known regarding PFAS contributions via pesticide applications: PFAS coming from pesticide containers and “inert” ingredients not listed on pesticide formulation labels. To better understand co-occurrence of pesticides and PFAS in agricultural streams, 10 streams...
Authors
Emily E. Woodward, Michelle L. Hladik, James L. Orlando, Matthew Uychutin, James L. Gray, Dana W. Kolpin
By
Pennsylvania Water Science Center

Identifying organic contaminants at trespass cannabis grows on federal land in California, USA Identifying organic contaminants at trespass cannabis grows on federal land in California, USA

Despite the legalization of recreational cannabis in California, USA, illegal cannabis cultivation remains pervasive, partly through the establishment of illegal cultivation on public lands (trespass grows). These operations often illegally divert water for irrigation and perform unauthorized applications of chemical fertilizers and pesticides. This work investigates a broad suite of...
Authors
Gabrielle Pecora Black, Matt De Parsia, Matthew Uychutin, Mourad W. Gabriel, Ivan Medel, Greta Wengert, Clayton D. Raines, Dana W. Kolpin, Laura E. Hubbard, Michelle L. Hladik
By
California Water Science Center

6PPD-quinone in water from the Sacramento-San Joaquin Delta, California, 2018-2024 6PPD-quinone in water from the Sacramento-San Joaquin Delta, California, 2018-2024

The Sacramento-San Joaquin Delta (Delta) is an expansive river delta supplying a large portion of California’s fresh water for agriculture and residential use, and it is also an area of critical habitat for numerous state and federally listed species of concern. In many locations, urban stormwater flows directly into the Delta. 6PPD-quinone (6PPD-Q), an ozonation byproduct of a tire...
Authors
Gabrielle Pecora Black, Matthew D. De Parsia, Matthew Uychutin, Rachael F. Lane, James Orlando, Michelle L. Hladik
By
Central Plains Water Science Center, California Water Science Center

Pesticide concentrations of surface water and suspended sediment in Yolo By-Pass and Cache Slough Complex, California, 2019–2021 Pesticide concentrations of surface water and suspended sediment in Yolo By-Pass and Cache Slough Complex, California, 2019–2021

Managed flow pulses in the north Sacramento-San Joaquin Delta are an adaptive management tool used in efforts to enhance food availability in delta smelt (Hypomesus transpacificus) habitat as part of the North Delta Food Subsidies Action. The California Department of Water Resources (DWR) monitors non-managed seasonal and local flow pulses and managed flow pulses from agricultural...
Authors
Matthew Uychutin, James L. Orlando, Michelle L. Hladik, Corey J. Sanders, Michael S. Gross, Matthew D. De Parsia, Elisabeth M. LaBarbera, Laura Twardochleb, Brittany E. Davis
By
Water Resources Mission Area, California Water Science Center
California Water Science Center Scientists to Present at 2023 IEP Annual Workshop

California Water Science Center Scientists to Present at 2023 IEP Annual Workshop

California Water Science Center (CAWSC) scientists will present their latest research at California’s 2023 Interagency Ecological Program (IEP)...

Read Article

Science and Products

Pollen samples from various plants collected from hedgerows

Organic Chemistry Research Core Technology Team

About the Research The Organic Chemistry Research Laboratory Core Technology Team (CTT) as part of the Environmental Health Program focuses on the identification and quantitation of trace level organic contaminants (with a special focus on pesticides) in a wide array of environmental media (water, sediment/soil, plants, biota, etc.).
By
Ecosystems Mission Area, Contaminant Biology, Environmental Health Program, Toxic Substances Hydrology
Organic Chemistry Research Core Technology Team

Organic Chemistry Research Core Technology Team

About the Research The Organic Chemistry Research Laboratory Core Technology Team (CTT) as part of the Environmental Health Program focuses on the identification and quantitation of trace level organic contaminants (with a special focus on pesticides) in a wide array of environmental media (water, sediment/soil, plants, biota, etc.).
Learn More
A yellow crop duster lets fall a cloud of spray on a cotton crop

Pesticide Fate Research Group (PFRG)

Pesticides are used in both agricultural and urban settings to manage unwanted plants, insects, fungi, and other pests. However, these substances and their breakdown products can move beyond their intended application sites through various means, ending up in areas where they weren't meant to be. This movement can happen via the air, through water (both surface and groundwater), and by sticking to...
By
California Water Science Center, Organic Chemistry Research Laboratory
Pesticide Fate Research Group (PFRG)

Pesticide Fate Research Group (PFRG)

Pesticides are used in both agricultural and urban settings to manage unwanted plants, insects, fungi, and other pests. However, these substances and their breakdown products can move beyond their intended application sites through various means, ending up in areas where they weren't meant to be. This movement can happen via the air, through water (both surface and groundwater), and by sticking to...
Learn More

Pesticide Exposure in Wet Meadows of Southeast Idaho, 2025 Pesticide Exposure in Wet Meadows of Southeast Idaho, 2025

Wet meadow habitats in southeast Idaho, which are important areas for wetland-dependent wildlife, are managed by four National Wildlife Refuges (NWR). Threats to this important, but regionally declining habitat include pesticide drift from adjacent and nearby lands. In this study, four NWRs, Camas, Minidoka, Bear Lake, and Grays Lake, are investigated for the presence of pesticides...
By
California Water Science Center

Pesticide concentrations in moths and other insects collected from the United States and Canada, 2022 to 2024 Pesticide concentrations in moths and other insects collected from the United States and Canada, 2022 to 2024

Both aquatic and terrestrial insects can undergo complex evolutionary phases throughout their lifespan. Insects in a larval phase can accumulate and retain some chemicals, such as pesticides, throughout their various life cycles. Mature insects are often more mobile than their younger counterparts, making them able to transport pesticides over further distances. Insectivores (animals...
By
California Water Science Center

Concurrent Occurrence of Pesticides and Per- and Polyfluoroalkyl Substances (PFAS) in Agricultural Streams in California, USA Concurrent Occurrence of Pesticides and Per- and Polyfluoroalkyl Substances (PFAS) in Agricultural Streams in California, USA

Per-and polyfluoroalkyl substances (PFAS) are frequently found in streams, with most research focusing on urban sources of PFAS to surface water (e.g., firefighting foams, industrial releases, and wastewater treatment plant discharges). Pesticide applications are an under-investigated source of PFAS to streams in both agricultural and urban areas. There are few studies that analyze the...
By
California Water Science Center

Organic Contaminants at Trespass Cannabis Grows on Federal Land in California, USA Organic Contaminants at Trespass Cannabis Grows on Federal Land in California, USA

Despite the legalization of recreational cannabis in California, illegal cultivation persists, particularly on public lands (trespass grows). These operations often divert water unlawfully and apply unauthorized chemical fertilizers and pesticides. This dataset reports the presence, and in some cases concentrations, of persistent chemicals in soil, water, and sediment in nearby streams...
By
California Water Science Center

Pesticide Concentrations Measured in Zooplankton Samples Collected from the Sacramento River, Yolo Bypass, and Cache Slough Region, California, 2024 Pesticide Concentrations Measured in Zooplankton Samples Collected from the Sacramento River, Yolo Bypass, and Cache Slough Region, California, 2024

Zooplankton samples were collected in the summer/fall of 2024 at multiple sites in the Sacramento River, Yolo Bypass, and Cache Slough Region of California and analyzed for a suite of 160 current-use pesticides and pesticide degradates by the U.S. Geological Survey Organic Chemistry Research Laboratory. Samples were collected at two sites in the Bypass, at a comparison site on the...
By
California Water Science Center

6PPD-quinone concentrations in the Sacramento-San Joaquin Delta, California, 2018-2024 6PPD-quinone concentrations in the Sacramento-San Joaquin Delta, California, 2018-2024

The Sacramento-San Joaquin Delta is a crucial river delta that supplies a significant portion of California's freshwater for agricultural and residential use and serves as critical habitat for numerous state and federally listed species of concern. In several areas, urban stormwater drains discharge directly into the Delta. 6PPD-quinone (6PPD-Q, 2-anilo-5-[(4-methylpentan-2- yl)amino...
By
California Water Science Center

Pesticide Concentrations Measured in Zooplankton Samples Collected from the Sacramento River, Yolo Bypass, and Cache Slough Region, California, 2022 and 2023 Pesticide Concentrations Measured in Zooplankton Samples Collected from the Sacramento River, Yolo Bypass, and Cache Slough Region, California, 2022 and 2023

Zooplankton samples were collected in the summer/fall of 2022 and 2023 at multiple sites in the Sacramento River, Yolo Bypass, and Cache Slough Region of California and analyzed for a suite of 160 current-use pesticides and pesticide degradates by the U.S. Geological Survey Organic Chemistry Research Laboratory. In 2022 samples were collected at two sites in the Bypass and at a...
By
California Water Science Center

Pesticide Concentrations Measured in Zooplankton Samples Collected from the Sacramento River and Yolo Bypass, California, 2021 Pesticide Concentrations Measured in Zooplankton Samples Collected from the Sacramento River and Yolo Bypass, California, 2021

Zooplankton samples were collected at one site upstream of the Yolo Bypass in Northern California, three sites within the Bypass, and at a comparison site on the Sacramento River below the city of Sacramento and analyzed for a large suite of current-use pesticides and degradates. Samples were collected every two weeks from early August 2021 to mid-October 2021. Samples were collected by...
By
California Water Science Center

Concentrations of pesticides in silicone bands as passive samplers and sediment in Pinnacles National Park and Bureau of Land Management lands in San Benito County, California, 2019-2021 Concentrations of pesticides in silicone bands as passive samplers and sediment in Pinnacles National Park and Bureau of Land Management lands in San Benito County, California, 2019-2021

To better understand the potential pesticide exposure, samples were collected from locations along two creeks in Pinnacles National Park and four creeks in nearby Bureau of Land Management (BLM) lands. Silicone bands were used as passive sampling devices (PSD) staked in the creek and above in the air (above the water line). Sampling was conducted in the summer from 2019 to 2021. PSDs...
By
California Water Science Center

Pesticide detections in streams throughout the foothills of the Sierra Nevada range using passive samplers from 2017 to 2019 Pesticide detections in streams throughout the foothills of the Sierra Nevada range using passive samplers from 2017 to 2019

This dataset was produced from analyzing Affinisep SDB-RPS, Affinisep HLB, and Restek Resprep C18 disks that were deployed with the use of Chemcatcher� passive sampling devices. Silicone bands were also deployed and used for exploring economical methods of sampling for pesticides in surface water. Sampling assemblies were deployed in streams throughout the foothills of the Sierra Nevada...
By
California Water Science Center

Assessing pesticide application contributions of per- and polyfluoroalkyl substances (PFAS) in agricultural streams Assessing pesticide application contributions of per- and polyfluoroalkyl substances (PFAS) in agricultural streams

Research has documented per-and polyfluoroalkyl substances (PFAS) to be prevalent in streams impacted by urban sources; less is known regarding PFAS contributions via pesticide applications: PFAS coming from pesticide containers and “inert” ingredients not listed on pesticide formulation labels. To better understand co-occurrence of pesticides and PFAS in agricultural streams, 10 streams...
Authors
Emily E. Woodward, Michelle L. Hladik, James L. Orlando, Matthew Uychutin, James L. Gray, Dana W. Kolpin
By
Pennsylvania Water Science Center

Identifying organic contaminants at trespass cannabis grows on federal land in California, USA Identifying organic contaminants at trespass cannabis grows on federal land in California, USA

Despite the legalization of recreational cannabis in California, USA, illegal cannabis cultivation remains pervasive, partly through the establishment of illegal cultivation on public lands (trespass grows). These operations often illegally divert water for irrigation and perform unauthorized applications of chemical fertilizers and pesticides. This work investigates a broad suite of...
Authors
Gabrielle Pecora Black, Matt De Parsia, Matthew Uychutin, Mourad W. Gabriel, Ivan Medel, Greta Wengert, Clayton D. Raines, Dana W. Kolpin, Laura E. Hubbard, Michelle L. Hladik
By
California Water Science Center

6PPD-quinone in water from the Sacramento-San Joaquin Delta, California, 2018-2024 6PPD-quinone in water from the Sacramento-San Joaquin Delta, California, 2018-2024

The Sacramento-San Joaquin Delta (Delta) is an expansive river delta supplying a large portion of California’s fresh water for agriculture and residential use, and it is also an area of critical habitat for numerous state and federally listed species of concern. In many locations, urban stormwater flows directly into the Delta. 6PPD-quinone (6PPD-Q), an ozonation byproduct of a tire...
Authors
Gabrielle Pecora Black, Matthew D. De Parsia, Matthew Uychutin, Rachael F. Lane, James Orlando, Michelle L. Hladik
By
Central Plains Water Science Center, California Water Science Center

Pesticide concentrations of surface water and suspended sediment in Yolo By-Pass and Cache Slough Complex, California, 2019–2021 Pesticide concentrations of surface water and suspended sediment in Yolo By-Pass and Cache Slough Complex, California, 2019–2021

Managed flow pulses in the north Sacramento-San Joaquin Delta are an adaptive management tool used in efforts to enhance food availability in delta smelt (Hypomesus transpacificus) habitat as part of the North Delta Food Subsidies Action. The California Department of Water Resources (DWR) monitors non-managed seasonal and local flow pulses and managed flow pulses from agricultural...
Authors
Matthew Uychutin, James L. Orlando, Michelle L. Hladik, Corey J. Sanders, Michael S. Gross, Matthew D. De Parsia, Elisabeth M. LaBarbera, Laura Twardochleb, Brittany E. Davis
By
Water Resources Mission Area, California Water Science Center
California Water Science Center Scientists to Present at 2023 IEP Annual Workshop

California Water Science Center Scientists to Present at 2023 IEP Annual Workshop

California Water Science Center (CAWSC) scientists will present their latest research at California’s 2023 Interagency Ecological Program (IEP)...

Read Article
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