View looking upstream from the hiking trail at Dinosaur national monument. Shows Brown's Park, our camp and the boats, beach, river, scenic background with cottonwoods
Melissa A Lombard
Melissa Lombard is a Research Hydrologist in the New England Water Science Center.
In the broadest sense, Melissa's work is at the intersection of humans and the environment. Her research interests include connecting environmental geochemistry with human and ecosystem health and using machine learning models as a tool to understand, estimate, and predict contaminant occurrence and water availability and use. Much of her work has focused on building and using models as a tool for understanding and predicting trace element occurrence in groundwater. She enjoys collaborating with epidemiologists and public health scientists to link the occurrence of these elements to human health outcomes. Other research interests include the impacts of climate change on water quality, water availability, and human health, and the environmental health effects from the reuse of materials from unconventional oil and gas development. Her previous professional experience includes running analytical instruments in clean labs, overseeing groundwater sampling activities at contaminated sites, and collecting atmospheric mercury samples. Previous research has included examining the potential human health effects from exposure to biodiesel and petroleum diesel emissions, the occurrence of mercury in rainwater, and the occurrence of pesticides and herbicides in groundwater. She has also worked with K-12 science educators and taught college level courses in geology and environmental science.
Professional Experience
Research Hydrologist, U.S. Geological Survey, New England Water Science Center, 2022 to Present
Hydrologist, U.S. Geological Survey, New England Water Science Center, 2017 to 2022
Education and Certifications
Ph.D. Earth and Environmental Science, University of New Hampshire, 2012
M.S. Geology, Rensselaer Polytechnic Institute, 2002
B.A. Geoscience, William Smith College, 1995
Affiliations and Memberships*
Licensed Professional Geologist, State of New Hampshire, 2015
Science and Products
Coproduced Science Linking Environmental and Public-Health Data to Evaluate Drinking Water Arsenic Exposure on Birth Outcomes
USGS Publications on the Water Resources of Cape Cod and Southeastern Massachusetts
Preliminary Research into the Causes of Iron Fouling in Water at Roadway Construction Sites
Towards Understanding the Impact of Drought on the Arsenic Hazard for the Private Domestic Well Population in the United States
Linking environmental and public health data to evaluate health effects of arsenic exposure from domestic and public supply wells
Data and model archive used to model and map lithium concentrations in groundwater sources of drinking water in the conterminous United States
U.S. Streamflow Drought During the Last Century: annual drought and low flow metrics, annual climate, and trends for the periods 1921-2020, 1951-2020 and 1981-2020
Geospatial Fabric for National Hydrologic Modeling, version 1.1
Data used to model and map arsenic concentration exceedances in private wells throughout the conterminous United States for human health studies
Datasets for assessing the impact of drought on arsenic exposure from private domestic wells in the conterminous United States
Iron fouling data associated with drainage from roadway sites constructed with rock fill in New Hampshire
Concentrations of arsenic in water from public supply and domestic wells in New Hampshire
This dataset contains arsenic concentrations from bedrock aquifer wells located throughout New Hampshire and includes public supply wells and domestic supply wells.
Testing dataset for independent analysis of New Hampshire arsenic model
View looking upstream from the hiking trail at Dinosaur national monument. Shows Brown's Park, our camp and the boats, beach, river, scenic background with cottonwoods
A view looking down on the river from the hills above camp. View is upstream and shows a nice river meander with a point bar and scenic hills in the background. This is in Brown's Park.
A view looking down on the river from the hills above camp. View is upstream and shows a nice river meander with a point bar and scenic hills in the background. This is in Brown's Park.
The scenic view of the Gates of Lodore from Brown's Park. The Green River through Brown's Park is very calm, slow moving water, with canyon walls and up ahead looms the scar where the river has eroded it's way down through the mountains.
The scenic view of the Gates of Lodore from Brown's Park. The Green River through Brown's Park is very calm, slow moving water, with canyon walls and up ahead looms the scar where the river has eroded it's way down through the mountains.
A great examples of the crossbeds in the Uinta Formation, a quarzite dating back to the PreCambrian, on a beautiful sunny morning with mist hanging above the river as the sun rises.
A great examples of the crossbeds in the Uinta Formation, a quarzite dating back to the PreCambrian, on a beautiful sunny morning with mist hanging above the river as the sun rises.
A close-up of a bald eagle hanging out on a cliff along the Green River in swallow canyon
A close-up of a bald eagle hanging out on a cliff along the Green River in swallow canyon
Two of the SCREE rafts heading downstream through Swallow Canyon
Two of the SCREE rafts heading downstream through Swallow Canyon
A group of cliff swallow nests made from mud in the river in Swallow Canyon. Many of the nests have birds in them and can be identified by their yellow beaks sticking out.
A group of cliff swallow nests made from mud in the river in Swallow Canyon. Many of the nests have birds in them and can be identified by their yellow beaks sticking out.
A flock of pelicans in the water in Brown's Park.
A flock of pelicans in the water in Brown's Park.
View looking upstream at Flaming Gorge Dam from the boat launch area
View looking upstream at Flaming Gorge Dam from the boat launch area
View looking downstream from just below the boat launch at Flaming Gorge Dam.
View looking downstream from just below the boat launch at Flaming Gorge Dam.
Association of water arsenic with incident diabetes in U.S. adults: The Multi-Ethnic Study of Atherosclerosis and The Strong Heart Study
Estimating lithium concentrations in groundwater used as drinking water for the conterminous United States
Contribution of arsenic and uranium in private wells and community water systems to urinary biomarkers in US adults: The Strong Heart Study and the Multi-Ethnic Study of Atherosclerosis
Cross-sectional associations between drinking water arsenic and urinary inorganic arsenic in the US: NHANES 2003-2014
A hydrologic perspective of major U.S. droughts
Going beyond low flows: Streamflow drought deficit and duration illuminate distinct spatiotemporal drought patterns and trends in the U.S. during the last century
Arsenic in private well water and birth outcomes in the United States
Perfluoroalkyl and polyfluoroalkyl substances in groundwater used as a source of drinking water in the eastern United States
In 2019, 254 samples were collected from five aquifer systems to evaluate per- and polyfluoroalkyl substance (PFAS) occurrence in groundwater used as a source of drinking water in the eastern United States. The samples were analyzed for 24 PFAS, major ions, nutrients, trace elements, dissolved organic carbon (DOC), volatile organic compounds (VOCs), pharmaceuticals, and tritium. Fourteen of the 24
Associations between private well water and community water supply arsenic concentrations in the conterminous United States
Machine learning models of arsenic in private wells throughout the conterminous United States as a tool for exposure assessment in human health studies
Assessing the impact of drought on arsenic exposure from private domestic wells in the conterminous United States
A multi-model approach toward understanding iron fouling at rock-fill drainage sites along roadways in New Hampshire, USA
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Coproduced Science Linking Environmental and Public-Health Data to Evaluate Drinking Water Arsenic Exposure on Birth Outcomes
USGS Publications on the Water Resources of Cape Cod and Southeastern Massachusetts
Preliminary Research into the Causes of Iron Fouling in Water at Roadway Construction Sites
Towards Understanding the Impact of Drought on the Arsenic Hazard for the Private Domestic Well Population in the United States
Linking environmental and public health data to evaluate health effects of arsenic exposure from domestic and public supply wells
Data and model archive used to model and map lithium concentrations in groundwater sources of drinking water in the conterminous United States
U.S. Streamflow Drought During the Last Century: annual drought and low flow metrics, annual climate, and trends for the periods 1921-2020, 1951-2020 and 1981-2020
Geospatial Fabric for National Hydrologic Modeling, version 1.1
Data used to model and map arsenic concentration exceedances in private wells throughout the conterminous United States for human health studies
Datasets for assessing the impact of drought on arsenic exposure from private domestic wells in the conterminous United States
Iron fouling data associated with drainage from roadway sites constructed with rock fill in New Hampshire
Concentrations of arsenic in water from public supply and domestic wells in New Hampshire
This dataset contains arsenic concentrations from bedrock aquifer wells located throughout New Hampshire and includes public supply wells and domestic supply wells.
Testing dataset for independent analysis of New Hampshire arsenic model
View looking upstream from the hiking trail at Dinosaur national monument. Shows Brown's Park, our camp and the boats, beach, river, scenic background with cottonwoods
View looking upstream from the hiking trail at Dinosaur national monument. Shows Brown's Park, our camp and the boats, beach, river, scenic background with cottonwoods
A view looking down on the river from the hills above camp. View is upstream and shows a nice river meander with a point bar and scenic hills in the background. This is in Brown's Park.
A view looking down on the river from the hills above camp. View is upstream and shows a nice river meander with a point bar and scenic hills in the background. This is in Brown's Park.
The scenic view of the Gates of Lodore from Brown's Park. The Green River through Brown's Park is very calm, slow moving water, with canyon walls and up ahead looms the scar where the river has eroded it's way down through the mountains.
The scenic view of the Gates of Lodore from Brown's Park. The Green River through Brown's Park is very calm, slow moving water, with canyon walls and up ahead looms the scar where the river has eroded it's way down through the mountains.
A great examples of the crossbeds in the Uinta Formation, a quarzite dating back to the PreCambrian, on a beautiful sunny morning with mist hanging above the river as the sun rises.
A great examples of the crossbeds in the Uinta Formation, a quarzite dating back to the PreCambrian, on a beautiful sunny morning with mist hanging above the river as the sun rises.
A close-up of a bald eagle hanging out on a cliff along the Green River in swallow canyon
A close-up of a bald eagle hanging out on a cliff along the Green River in swallow canyon
Two of the SCREE rafts heading downstream through Swallow Canyon
Two of the SCREE rafts heading downstream through Swallow Canyon
A group of cliff swallow nests made from mud in the river in Swallow Canyon. Many of the nests have birds in them and can be identified by their yellow beaks sticking out.
A group of cliff swallow nests made from mud in the river in Swallow Canyon. Many of the nests have birds in them and can be identified by their yellow beaks sticking out.
A flock of pelicans in the water in Brown's Park.
A flock of pelicans in the water in Brown's Park.
View looking upstream at Flaming Gorge Dam from the boat launch area
View looking upstream at Flaming Gorge Dam from the boat launch area
View looking downstream from just below the boat launch at Flaming Gorge Dam.
View looking downstream from just below the boat launch at Flaming Gorge Dam.
Association of water arsenic with incident diabetes in U.S. adults: The Multi-Ethnic Study of Atherosclerosis and The Strong Heart Study
Estimating lithium concentrations in groundwater used as drinking water for the conterminous United States
Contribution of arsenic and uranium in private wells and community water systems to urinary biomarkers in US adults: The Strong Heart Study and the Multi-Ethnic Study of Atherosclerosis
Cross-sectional associations between drinking water arsenic and urinary inorganic arsenic in the US: NHANES 2003-2014
A hydrologic perspective of major U.S. droughts
Going beyond low flows: Streamflow drought deficit and duration illuminate distinct spatiotemporal drought patterns and trends in the U.S. during the last century
Arsenic in private well water and birth outcomes in the United States
Perfluoroalkyl and polyfluoroalkyl substances in groundwater used as a source of drinking water in the eastern United States
In 2019, 254 samples were collected from five aquifer systems to evaluate per- and polyfluoroalkyl substance (PFAS) occurrence in groundwater used as a source of drinking water in the eastern United States. The samples were analyzed for 24 PFAS, major ions, nutrients, trace elements, dissolved organic carbon (DOC), volatile organic compounds (VOCs), pharmaceuticals, and tritium. Fourteen of the 24
Associations between private well water and community water supply arsenic concentrations in the conterminous United States
Machine learning models of arsenic in private wells throughout the conterminous United States as a tool for exposure assessment in human health studies
Assessing the impact of drought on arsenic exposure from private domestic wells in the conterminous United States
A multi-model approach toward understanding iron fouling at rock-fill drainage sites along roadways in New Hampshire, USA
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government