Stratified sand in an excavation near the Connecticut River in Portland, Connecticut. The sand was deposited as a delta in a glacial lake that occupied the Connecticut River Valley about 18,000-19,000 years ago.
John R Mullaney
John Mullaney is a Hydrologist in the New England Water Science Center.
John serves as the Center Groundwater Specialist. He began working for the USGS in 1986, and has worked on a wide variety of groundwater and water-quality studies in Connecticut and other parts of New England.
Current projects include:
- National surveillance of the status of groundwater levels in the United States
- Evaluation of the effects of bottled water extraction in the Saco River Basin, New Hampshire and Maine
- Evaluation of nitrogen loads to Long Island Sound from the major tributaries
- Analysis of tidal groundwater levels in the vicinity of the Herring River, Lower Cape Cod, as part of a proposed tidal marsh restoration at the Cape Cod National Seashore
- Development of tools using R computing environment for review of water-quality and groundwater-level data
- Development of web pages using the R computing environment for display of USGS data
Highlights of past work:
- Analysis of long-term nutrient trends and loads to Long Island Sound and Narragansett Bay
- Analysis of water quality in Connecticut in the four decades since the Clean Water Act
- Modeling nitrogen loads from groundwater to streams and Long Island Sound
- Use of surrogate methods to determine total nitrogen concentrations in the lower Connecticut River from sensor data
- Analysis of the effects of road deicing on groundwater and surface water quality
- Investigation of the effects of sea-level rise on groundwater levels in New Haven, Connecticut
- Modeling groundwater flow and water use from a crystalline bedrock aquifer, southwestern Connecticut
- Assessment of the hydrogeology and water-quality of a large Superfund site in southwestern Connecticut
- Studies of groundwater and surface water quality with the USGS National Water Quality Assessment Program (NAWQA)
- Mapping the geohydrology of the Upper Connecticut and Androscoggin Basins, northern New Hampshire
- Statewide assessment of pesticides in groundwater in Connecticut
Professional Experience
Hydrologist, Groundwater Specialist, U.S. Geological Survey, New England Water Science Center, 2017 to Present
Acting Groundwater Specialist, California Water Science Center, 2020 to 2021
Hydrologist, Lead Scientist, Groundwater Specialist, U.S. Geological Survey, Connecticut Office, 2014 to 2017
Supervisory Hydrologist, Chief of the Hydrologic Studies Section, U.S. Geological Survey, Connecticut Water Science Center, 2007 to 2013
Hydrologist, U.S. Geological Survey, Connecticut Water Science Center, 1992 to 2007
Hydrologist, U.S. Geological Survey, New Hampshire-Vermont Office, 1991
Hydrologist, U.S. Geological Survey, Connecticut Office, New England District, 1989 to 1991
Hydrologic Technician, U.S. Geological Survey, Connecticut Office, New England District, 1986 to 1989
Education and Certifications
B.S. Geology, University of Connecticut, 1986
Affiliations and Memberships*
Connecticut Interagency Drought Workgroup, Technical Assistance
Long Island Sound Study, Science and Technical Advisory Committee
Abstracts and Presentations
Panel Discussion: dataRetrieval: Success Stories and Future Enhancements, National Water Quality Monitoring Conference, April 2021
Is Greenwich facing a water shortage? One Air, Water, and Land a New Environmental Lecture Series Hosted by Cos Cob Library, Greenwich CT, Panelist, March, 2021
Nitrogen Loading Analysis of Tributaries to Long Island Sound, Restore America's Estuaries Summit, 2020, virtual meeting
Groundwater and surface water, a single resource in New England, Water, New England’s next Big Challenge, Southeastern Massachusetts Watershed Action Alliance, March 29, 2019
Science and Products
Chloride Data for Streams in Connecticut, Massachusetts, and Rhode Island
New England Drought, 2020
New England Drought Information
Development of a Regional-Scale Model to Simulate Groundwater Flow and Nitrogen Loading in Watersheds Along the Connecticut Coast of Long Island Sound
Groundwater and Surface-Water Monitoring in the Mill Creek Watershed, Wellfleet and Truro, Massachusetts
Updating a Method to Estimate Probable High Groundwater Levels in Massachusetts
Nitrogen Loads, Yields, and Associated Field Data Collected During Baseflow Conditions and Site Attributes for Small Basins Draining to Long Island Sound
Nitrogen Concentrations and Loads and Seasonal Nitrogen Loads in Selected Long Island Sound Tributaries, Water Years 1995-2021 (ver. 1.1, February 2024)
Data on Models to Describe Groundwater Levels and Stream Stage near the Herring River, Wellfleet, Cape Cod, Massachusetts, 2017-2022
MODFLOW-NWT and MODPATH groundwater flow models of steady-state conditions in coastal Connecticut and adjacent areas of New York and Rhode Island, as well as a nitrogen transport model of the Niantic River watershed
Summary simulated groundwater budgets and travel times for watersheds on the north shore of Long Island Sound
Nitrogen concentrations and loads and seasonal nitrogen loads in selected Long Island Sound tributaries, water years 1995-2016
Data on Nitrogen Concentrations and Loads for the Connecticut River at Middle Haddam, Connecticut, Computed with the Use of Auto-Sampling and Continuous Measurements of Water Quality, 2008-2014
Data on well characteristics and well-pair characteristics for estimating high groundwater levels in selected areas of Massachusetts
Data on Tidally Filtered Groundwater and Surface-Water Levels, and Climatological Data Near Mill Creek and the Herring River, Cape Cod, Wellfleet, Massachusetts, 2017-2018
Stratified sand in an excavation near the Connecticut River in Portland, Connecticut. The sand was deposited as a delta in a glacial lake that occupied the Connecticut River Valley about 18,000-19,000 years ago.
A Geoscientist-in-the-Park Guest Scientist for the National Park Service services a USGS groundwater well located within the Mill Creek basin near the Herring River in Wellfleet, Massachusetts.
A Geoscientist-in-the-Park Guest Scientist for the National Park Service services a USGS groundwater well located within the Mill Creek basin near the Herring River in Wellfleet, Massachusetts.
A gage on the backside of a tide control structure on the Herring River at Chequessett Neck Rd at Wellfleet, Massachusetts. It is evident to see the movement of incoming tide in this picture. Data was collected at this site for several years prior to the removal of the dike in 2023.
A gage on the backside of a tide control structure on the Herring River at Chequessett Neck Rd at Wellfleet, Massachusetts. It is evident to see the movement of incoming tide in this picture. Data was collected at this site for several years prior to the removal of the dike in 2023.
A look to the north along the bluffs at the Cape Cod National Seashore, from Marconi Station. Over the years, the USGS continues to work with the National Park Service at the Cape Cod National Seashore.
A look to the north along the bluffs at the Cape Cod National Seashore, from Marconi Station. Over the years, the USGS continues to work with the National Park Service at the Cape Cod National Seashore.
Hydrologic technician installs a storm-tide sensor ahead of Hurricane Sandy in Milford Harbor, Connecticut.
Hydrologic technician installs a storm-tide sensor ahead of Hurricane Sandy in Milford Harbor, Connecticut.
USGS hydrologist holding a dry erase board to identify the storm surge sensor location deployment on August 27, 2011. The sensor is strapped to the back of a dock piling on the Saugatuck River in Westport, CT owned by the Saugatuck River Rowing Club.
USGS hydrologist holding a dry erase board to identify the storm surge sensor location deployment on August 27, 2011. The sensor is strapped to the back of a dock piling on the Saugatuck River in Westport, CT owned by the Saugatuck River Rowing Club.
USGS hydrologist pointing to the location of a storm surge sensor deployment near the mouth of the Housatonic River in Stratford, CT at the Sikorsky aircraft facility on August 27, 2011.
USGS hydrologist pointing to the location of a storm surge sensor deployment near the mouth of the Housatonic River in Stratford, CT at the Sikorsky aircraft facility on August 27, 2011.
Simulation of groundwater budgets and travel times for watersheds on the north shore of Long Island Sound, with implications for nitrogen-transport studies
Updating data inputs, assessing trends, and evaluating a method to estimate probable high groundwater levels in selected areas of Massachusetts
Hydrogeology and interactions of groundwater and surface water near Mill Creek and the Herring River, Wellfleet, Massachusetts, 2017–18
Nitrogen budgets of the Long Island Sound estuary
Nitrogen concentrations and loads for the Connecticut River at Middle Haddam, Connecticut, computed with the use of autosampling and continuous measurements of water quality for water years 2009 to 2014
The Surge, Wave, and Tide Hydrodynamics (SWaTH) network of the U.S. Geological Survey—Past and future implementation of storm-response monitoring, data collection, and data delivery
Analysis of trends of water quality and streamflow in the Blackstone, Branch, Pawtuxet, and Pawcatuck Rivers, Massachusetts and Rhode Island, 1979 to 2015
Changes in phosphorus concentrations and loads in the Assabet River, Massachusetts, October 2008 through April 2014
Nitrogen loads from selected rivers in the Long Island Sound Basin, 2005–13, Connecticut and Massachusetts
Nutrient, organic carbon, and chloride concentrations and loads in selected Long Island Sound tributaries—Four decades of change following the passage of the Federal Clean Water Act
Chloride concentrations, loads, and yields in four watersheds along Interstate 95, southeastern Connecticut, 2008-11: factors that affect peak chloride concentrations during winter storms
Evaluation of the effects of sewering on nitrogen loads to the Niantic River, southeastern Connecticut, 2005-2011
Nitrogen Loading from Selected Long Island Sound Tributaries from 1995 to 2021
This dashboard application displays nitrogen concentrations and loads in selected Long Island Sound tributaries.
Interactive Map: Virginia and West Virginia Groundwater Levels and Trends
The Virginia and West Virginia Groundwater Levels and Trends web application provides access to groundwater level data from continuous groundwater wells across Virginia and West Virginia. Continuous wells include real time and non-real time wells. Data update daily and are compared to long-term monthly statistics.
Determining High Groundwater Levels in Massachusetts
A method (commonly referred to as the Frimpter method) was developed in early 1980’s to estimate probable high groundwater levels across Massachusetts. The map and table on the web page linked above provide information on wells in the Massachusetts Observation-Well Network which have been used as index wells.
Groundwater Levels in New England
View recent monthly and daily groundwater levels in New England relative to long-term monthly statistics.
Nitrogen Loading from Selected Long Island Sound Tributaries from 1995 to 2016
This dashboard application displays nitrogen concentrations and loads in selected Long Island Sound tributaries.
Chloride Data for Streams in Connecticut, Massachusetts, and Rhode Island
View recent and historical chloride and specific conductance data for active water-quality monitoring stations on streams in Connecticut, Massachusetts, and Rhode Island.
Groundwater and Surface-Water Monitoring in the Mill Creek Watershed, Wellfleet and Truro, Massachusetts - Web Map
Map of the Mill Creek Watershed, Wellfleet and Truro, Massachusetts.
Science and Products
- Science
Chloride Data for Streams in Connecticut, Massachusetts, and Rhode Island
As part of water-quality data collection activities in New England, water samples are analyzed for chloride in monitoring networks and projects across Connecticut, Massachusetts, and Rhode Island. Chloride is of interest because high concentrations may affect aquatic life in streams or affect water quality of reservoirs and aquifers used for drinking water.New England Drought, 2020
Below average and infrequent rainfall from May through September 2020 led to an extreme hydrologic drought across much of New England, with some areas experiencing a flash (quick-onset) drought.New England Drought Information
Droughts are one of the most expensive and damaging hydrologic hazards in the United States. They are generally slow in developing, frequently occur over a long period of time, and can affect large areas and populations.Development of a Regional-Scale Model to Simulate Groundwater Flow and Nitrogen Loading in Watersheds Along the Connecticut Coast of Long Island Sound
In 2018 USGS began work on the development of regional-scale groundwater flow and nitrogen transport models of areas along the Connecticut coast. The model will be used as a quantitative tool to evaluate groundwater flow and nitrogen loading to Long Island Sound.Groundwater and Surface-Water Monitoring in the Mill Creek Watershed, Wellfleet and Truro, Massachusetts
The Herring River estuary and salt marsh system, within the Cape Cod National Seashore in Wellfleet, Massachusetts, has been diked off from the ocean for more than 100 years. The National Park Service is now preparing to restore the 1,100 acre estuary-marsh system.Updating a Method to Estimate Probable High Groundwater Levels in Massachusetts
Periodic high groundwater levels are a major cause of septic system-failures, wet basements, and other problems for suburban and rural residents in Massachusetts. To address this issue, a method (commonly referred to as the Frimpter method) was developed in early 1980’s to estimate probable high groundwater levels across the state. The USGS New England Water Science Center, in cooperation with the... - Data
Nitrogen Loads, Yields, and Associated Field Data Collected During Baseflow Conditions and Site Attributes for Small Basins Draining to Long Island Sound
During the spring and summer of 2022, the U.S. Geological Survey collected water-quality samples for nutrient analysis at 45 stations across the state of Connecticut and adjacent areas of New York and Rhode Island to better understand the groundwater discharge component of nitrogen loading to the Long Island Sound. The targeted stations were located in small drainage basins (less than 50 square kiNitrogen Concentrations and Loads and Seasonal Nitrogen Loads in Selected Long Island Sound Tributaries, Water Years 1995-2021 (ver. 1.1, February 2024)
This U.S. Geological Survey (USGS) data release presents tabular data on nitrogen concentrations and loads for multiple nitrogen species, and river discharge data used in the analysis of data collected from October 1994 to September 2021. Data on flow and nitrogen concentrations were analyzed using the USGS Exploration and Graphics for RivEr Trends (EGRET) R package, and the method of Weighted RegData on Models to Describe Groundwater Levels and Stream Stage near the Herring River, Wellfleet, Cape Cod, Massachusetts, 2017-2022
Groundwater and estuary water levels near Mill Creek and the Herring River in Wellfleet, Massachusetts, were measured from June 2017 to August 2022. The data contained in these datasets consist of tables of updated statistics provided in the original work by Mullaney and others (2020, Appendix 2) and associated data release by Mullaney and Barclay (2020). The data include summary tables of water-lMODFLOW-NWT and MODPATH groundwater flow models of steady-state conditions in coastal Connecticut and adjacent areas of New York and Rhode Island, as well as a nitrogen transport model of the Niantic River watershed
A steady-state groundwater flow model, using MODFLOW-NWT, was developed to better understand groundwater flow in coastal Connecticut and adjacent areas of New York and Rhode Island. Aquatic systems in and around Long Island Sound (LIS) provide a variety of ecological and economic benefits such as flood and storm protection, water filtration, recreation, habitat for commercially and recreationallySummary simulated groundwater budgets and travel times for watersheds on the north shore of Long Island Sound
A steady-state groundwater flow model was developed for watersheds on the north shore of Long Island Sound in coastal Connecticut and adjacent areas of New York and Rhode Island. As part of the analysis, groundwater travel times and the components of the groundwater budget were calculated for each HUC12 basin within the model domain and for the watersheds of selected embayments identified by the CNitrogen concentrations and loads and seasonal nitrogen loads in selected Long Island Sound tributaries, water years 1995-2016
This U.S. Geological Survey data release presents tabular data on nitrogen concentrations and loads for multiple nitrogen species, and river discharge data used in the analysis of data collected from October 1994 to September 2016. Data on flow and nitrogen concentrations were analyzed using the USGS EGRET R package, and the method of WRTDS (Weighted Regression on Time Discharge and Season). DataData on Nitrogen Concentrations and Loads for the Connecticut River at Middle Haddam, Connecticut, Computed with the Use of Auto-Sampling and Continuous Measurements of Water Quality, 2008-2014
This U.S. Geological Survey data release presents tabular daily data on nitrate plus nitrite nitrogen and total nitrogen loads for the Connecticut River at Middle Haddam, Connecticut, from December 6, 2008, to September 30, 2014. The data release contains total nitrogen concentration estimates at 15-minute intervals from December 2011 to September 2014. The data release also includes tabular inforData on well characteristics and well-pair characteristics for estimating high groundwater levels in selected areas of Massachusetts
A method to estimate the probable high groundwater level in Massachusetts, excluding Cape Cod and the Islands was developed in 1981. The method, commonly called the "Frimpter Method," uses a groundwater measurement from a test site, groundwater measurements from an index well, and a distribution of high groundwater levels from wells in similar geologic and topographic settings. Historic groundwateData on Tidally Filtered Groundwater and Surface-Water Levels, and Climatological Data Near Mill Creek and the Herring River, Cape Cod, Wellfleet, Massachusetts, 2017-2018
Groundwater and estuary water levels near Mill Creek, and the Herring River in Wellfleet Massachusetts were measured from June 2017 to June 14, 2018. Water-level data have been filtered to remove the effects of the daily tides. The mean daily value of the tidally filtered 15 minute water-level data is presented. The data also include a composite data set of daily precipitation values, as well as d - Multimedia
Stratified Sand
Stratified sand in an excavation near the Connecticut River in Portland, Connecticut. The sand was deposited as a delta in a glacial lake that occupied the Connecticut River Valley about 18,000-19,000 years ago.
Stratified sand in an excavation near the Connecticut River in Portland, Connecticut. The sand was deposited as a delta in a glacial lake that occupied the Connecticut River Valley about 18,000-19,000 years ago.
Groundwater Well in Mill Creek Basin in Cape Cod National SeashoreGroundwater Well in Mill Creek Basin in Cape Cod National SeashoreA Geoscientist-in-the-Park Guest Scientist for the National Park Service services a USGS groundwater well located within the Mill Creek basin near the Herring River in Wellfleet, Massachusetts.
A Geoscientist-in-the-Park Guest Scientist for the National Park Service services a USGS groundwater well located within the Mill Creek basin near the Herring River in Wellfleet, Massachusetts.
Tidal Water Moving through a Tide Control Structure in Wellfleet, MassachusettsTidal Water Moving through a Tide Control Structure in Wellfleet, MassachusettsA gage on the backside of a tide control structure on the Herring River at Chequessett Neck Rd at Wellfleet, Massachusetts. It is evident to see the movement of incoming tide in this picture. Data was collected at this site for several years prior to the removal of the dike in 2023.
A gage on the backside of a tide control structure on the Herring River at Chequessett Neck Rd at Wellfleet, Massachusetts. It is evident to see the movement of incoming tide in this picture. Data was collected at this site for several years prior to the removal of the dike in 2023.
Cape Cod National SeashoreA look to the north along the bluffs at the Cape Cod National Seashore, from Marconi Station. Over the years, the USGS continues to work with the National Park Service at the Cape Cod National Seashore.
A look to the north along the bluffs at the Cape Cod National Seashore, from Marconi Station. Over the years, the USGS continues to work with the National Park Service at the Cape Cod National Seashore.
Storm-tide sensor installation before Hurricane SandyStorm-tide sensor installation before Hurricane SandyHydrologic technician installs a storm-tide sensor ahead of Hurricane Sandy in Milford Harbor, Connecticut.
Hydrologic technician installs a storm-tide sensor ahead of Hurricane Sandy in Milford Harbor, Connecticut.
Storm surge sensor deployment on the Saugatuck RiverStorm surge sensor deployment on the Saugatuck RiverUSGS hydrologist holding a dry erase board to identify the storm surge sensor location deployment on August 27, 2011. The sensor is strapped to the back of a dock piling on the Saugatuck River in Westport, CT owned by the Saugatuck River Rowing Club.
USGS hydrologist holding a dry erase board to identify the storm surge sensor location deployment on August 27, 2011. The sensor is strapped to the back of a dock piling on the Saugatuck River in Westport, CT owned by the Saugatuck River Rowing Club.
Storm surge sensor deployment on the Housatonic RiverStorm surge sensor deployment on the Housatonic RiverUSGS hydrologist pointing to the location of a storm surge sensor deployment near the mouth of the Housatonic River in Stratford, CT at the Sikorsky aircraft facility on August 27, 2011.
USGS hydrologist pointing to the location of a storm surge sensor deployment near the mouth of the Housatonic River in Stratford, CT at the Sikorsky aircraft facility on August 27, 2011.
- Publications
Filter Total Items: 31
Simulation of groundwater budgets and travel times for watersheds on the north shore of Long Island Sound, with implications for nitrogen-transport studies
Aquatic systems in and around the Long Island Sound (LIS) provide a variety of ecological and economic benefits, but in some areas of the LIS, aquatic ecosystems have become degraded by excess nitrogen. A substantial fraction of the nitrogen inputs to the LIS are transported through the groundwater-flow system. Because groundwater travel times in surficial aquifers can exceed 100 years, multiyearAuthorsJanet R. Barclay, John R. MullaneyUpdating data inputs, assessing trends, and evaluating a method to estimate probable high groundwater levels in selected areas of Massachusetts
A method to estimate the probable high groundwater level in Massachusetts, excluding Cape Cod and the islands, was developed in 1981. The method uses a groundwater measurement from a test site, groundwater measurements from an index well, and a distribution of high groundwater levels from wells in similar geologic and topographic settings. The U.S. Geological Survey, in cooperation with the MassacAuthorsJanet R. Barclay, John R. MullaneyHydrogeology and interactions of groundwater and surface water near Mill Creek and the Herring River, Wellfleet, Massachusetts, 2017–18
Groundwater levels and stream stage were monitored by the U.S. Geological Survey, in cooperation with the Friends of Herring River, at 19 sites in the Mill Creek Basin, a tributary of the Herring River in Wellfleet, Massachusetts, on outer Cape Cod, to provide baseline data prior to a proposed restoration of tidal flow to the Herring River estuary at the Cape Cod National Seashore. Tidal flow in tAuthorsJohn R. Mullaney, Janet R. Barclay, Kaitlin L. Laabs, Katherine D. LavalleeNitrogen budgets of the Long Island Sound estuary
Nitrogen (N) inputs to coastal ecosystems have significant impacts on coastal community structure. In N limited systems, increases in N inputs may lead to excess productivity and hypoxia. Like many temperate estuaries, Long Island Sound (LIS), a major eastern U.S. estuary, is a N limited system which has experienced seasonal hypoxia since the 1800s. This study is the first effort to constrain theAuthorsPenny Vlahos, Michael Whitney, Christina Menniti, John R. Mullaney, Jonathan Morrison, Yan JiaNitrogen concentrations and loads for the Connecticut River at Middle Haddam, Connecticut, computed with the use of autosampling and continuous measurements of water quality for water years 2009 to 2014
The daily and annual loads of nitrate plus nitrite and total nitrogen for the Connecticut River at Middle Haddam, Connecticut, were determined for water years 2009 to 2014. The analysis was done with a combination of methods, which included a predefined rating curve method for nitrate plus nitrite and total nitrogen for water years 2009 to 2011 and a custom rating curve method that included sensorAuthorsJohn R. Mullaney, Joseph W. Martin, Jonathan MorrisonThe Surge, Wave, and Tide Hydrodynamics (SWaTH) network of the U.S. Geological Survey—Past and future implementation of storm-response monitoring, data collection, and data delivery
After Hurricane Sandy made landfall along the northeastern Atlantic coast of the United States on October 29, 2012, the U.S. Geological Survey (USGS) carried out scientific investigations to assist with protecting coastal communities and resources from future flooding. The work included development and implementation of the Surge, Wave, and Tide Hydrodynamics (SWaTH) network consisting of more thaAuthorsRichard J. Verdi, R. Russell Lotspeich, Jeanne C. Robbins, Ronald Busciolano, John R. Mullaney, Andrew J. Massey, William S. Banks, Mark A. Roland, Harry L. Jenter, Marie C. Peppler, Thomas P. Suro, Christopher E. Schubert, Mark R. NardiAnalysis of trends of water quality and streamflow in the Blackstone, Branch, Pawtuxet, and Pawcatuck Rivers, Massachusetts and Rhode Island, 1979 to 2015
Trends in long-term water-quality and streamflow data from six water-quality-monitoring stations within three major river basins in Massachusetts and Rhode Island that flow into Narragansett Bay and Little Narragansett Bay were evaluated for water years 1979–2015. In this study, conducted by the U.S. Geological Survey in cooperation with the Rhode Island Department of Environmental Management, theAuthorsJennifer G. Savoie, John R. Mullaney, Gardner C. BentChanges in phosphorus concentrations and loads in the Assabet River, Massachusetts, October 2008 through April 2014
Treated effluent discharged from municipal wastewater-treatment plants to the Assabet River in central Massachusetts includes phosphorus, which leads to increased growth of nuisance aquatic plants that decrease the river’s water quality and aesthetics in impounded reaches during the growing season. To improve the river’s water quality and aesthetics, the U.S. Environmental Protection Agency approvAuthorsJennifer G. Savoie, Leslie A. DeSimone, John R. Mullaney, Marc J. Zimmerman, Marcus C. WaldronNitrogen loads from selected rivers in the Long Island Sound Basin, 2005–13, Connecticut and Massachusetts
Total nitrogen loads at 14 water-quality monitoring stations were calculated by using discrete measurements of total nitrogen and continuous streamflow data for the period 2005–13 (water years 2006–13). Total nitrogen loads were calculated by using the LOADEST computer program.Overall, for water years 2006–13, streamflow in Connecticut was generally above normal. Total nitrogen yields ranged fromAuthorsJohn R. MullaneyNutrient, organic carbon, and chloride concentrations and loads in selected Long Island Sound tributaries—Four decades of change following the passage of the Federal Clean Water Act
Trends in long-term water-quality and streamflow data from 14 water-quality monitoring sites in Connecticut were evaluated for water years 1974–2013 and 2001–13, coinciding with implementation of the Clean Water Act of 1972 and the Connecticut Nitrogen Credit Exchange program, as part of an assessment of nutrient and chloride concentrations and loads discharged to Long Island Sound. In this study,AuthorsJohn R. MullaneyChloride concentrations, loads, and yields in four watersheds along Interstate 95, southeastern Connecticut, 2008-11: factors that affect peak chloride concentrations during winter storms
Chloride (Cl-) concentrations and loads and other water chemistry characteristics were assessed to evaluate potential effects of road-deicer applications on streamwater quality in four watersheds along Interstate 95 (I–95) in southeastern Connecticut from November 1, 2008, through September 30, 2011. Streamflow and water quality were studied in the Four Mile River, Oil Mill Brook, Stony Brook, andAuthorsCraig J. Brown, John R. Mullaney, Jonathan Morrison, Joseph W. Martin, Thomas J. TrombleyEvaluation of the effects of sewering on nitrogen loads to the Niantic River, southeastern Connecticut, 2005-2011
Nitrogen concentration data were collected from 20 wells near the Niantic River Estuary, during 18 sampling periods from 2005 through 2011, as part of a study to determine changes in nitrogen concentrations and loads as a result of sewering on the Pine Grove peninsula in Niantic, Connecticut. The Pine Grove peninsula area is a neighborhood of 35 acres containing 172 residences with onsite wastewatAuthorsJohn R. Mullaney - Web Tools
Nitrogen Loading from Selected Long Island Sound Tributaries from 1995 to 2021
This dashboard application displays nitrogen concentrations and loads in selected Long Island Sound tributaries.
Interactive Map: Virginia and West Virginia Groundwater Levels and Trends
The Virginia and West Virginia Groundwater Levels and Trends web application provides access to groundwater level data from continuous groundwater wells across Virginia and West Virginia. Continuous wells include real time and non-real time wells. Data update daily and are compared to long-term monthly statistics.
Determining High Groundwater Levels in Massachusetts
A method (commonly referred to as the Frimpter method) was developed in early 1980’s to estimate probable high groundwater levels across Massachusetts. The map and table on the web page linked above provide information on wells in the Massachusetts Observation-Well Network which have been used as index wells.
Groundwater Levels in New England
View recent monthly and daily groundwater levels in New England relative to long-term monthly statistics.
Nitrogen Loading from Selected Long Island Sound Tributaries from 1995 to 2016
This dashboard application displays nitrogen concentrations and loads in selected Long Island Sound tributaries.
Chloride Data for Streams in Connecticut, Massachusetts, and Rhode Island
View recent and historical chloride and specific conductance data for active water-quality monitoring stations on streams in Connecticut, Massachusetts, and Rhode Island.
Groundwater and Surface-Water Monitoring in the Mill Creek Watershed, Wellfleet and Truro, Massachusetts - Web Map
Map of the Mill Creek Watershed, Wellfleet and Truro, Massachusetts.
- News
*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