Regions

Delaware

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Located in the northeastern portion of the Delmarva Peninsula of the United States, Delaware is divided into three counties and is on a level plain, with the lowest mean elevation of any state in the nation with its highest elevation not rising fully 450 feet above sea level. An 80 foot ridge extends along the western boundary of the state separating watersheds that feed Delaware River and Bay.

Maryland - Delaware - Washington D.C. Water Science Center

Maryland -  Delaware - Washington D.C. Water Science Center

5522 Research Park Drive
Catonsville, MD 21228

Phone: 443-498-5500
Fax: 442-498-5510

MD-DE-DC Water

News

Photograph of a sonobuoy launch
September 20, 2018

Data acquired by the U.S. Geological Survey on the U.S. Atlantic Margin in August 2018 reveal new information about the distribution of gas hydrates in the sector stretching from the upper continental slope to deep water areas offshore New Jersey to North Carolina.

Two osprey nestlings in the Delaware Estuary
July 10, 2018

Lower levels of environmental contaminants—including pesticides, flame retardants and other pollutants—were recently found in osprey eggs in the Delaware Estuary compared to those tested from the 1970s through the early 2000s. 

Nor'easter
March 1, 2018

USGS field crews are deploying storm-tide and wave sensors today from Maine to Delaware to track and study a Nor’easter forecasted to begin tomorrow.

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Application to explore US Oil and Gas Assessments
Date Published: April 19, 2019
Status: Active

United States Assessments of Undiscovered Oil and Gas Resources

USGS Energy Resources Program provides periodic assessments of the oil and natural gas endowment of the United States and the World (click here for information about World Oil and Gas Assessments).  This website provides access to new, prioritized, assessment results and supporting data for the United States, as part...

Eastern Basins of US Oil and Gas Assessments
Date Published: December 19, 2018
Status: Active

Eastern Basins Oil and Gas Assessments

The USGS has conducted several assessments of undiscovered oil and gas in formations in the Blue Ridge Thrust Belt (5068), Piedmont Province (5069), Atlantic Coastal Plain Province (5070), and the New England Province (5072).  These basins are generally east of the Appalachian Basin...

Image of the Blue Ridge taken from the top of Stone Mountain
Date Published: September 27, 2018
Status: Active

Piedmont and Blue Ridge Project

The Piedmont and Blue Ridge Project is a geologic mapping project supported by the USGS National Cooperative Geologic Mapping Program. The Piedmont Blue Ridge Project aims to understand the geologic framework and tectonic evolution of terranes and basins in the Appalachian Piedmont and Blue Ridge, and their significance for water, mineral and energy resources, natural hazards, and engineering/...

A map showing the Coastal Basement Geology of the Southeastern U.S. Project
Date Published: September 11, 2018
Status: Active

Coastal Basement Geology of the Southeastern U.S. Project

This project, centered on South Carolina and Georgia, extends coastal-basement geologic mapping and related research south of a geologic map in production for pre-Cretaceous rocks beneath the Atlantic Coastal Plain from Virginia to southern New Jersey, and adds detail to a national-scale basement domain map constructed to delineate mineral-resource...

Tech sampling groundwater next to a table of sensors
Date Published: July 16, 2018
Status: Active

The health of maritime forests in three Mid-Atlantic National Seashores

The 2017 Work Plan for the National Resources Protection Program (NRPP) project on Fire Island, Sandy Hook, and Assateague includes a description of the issues and implications; description of the methods; and summary of the 2017 tasks, including site selection, well and instrumentation installation, and monitoring groundwater levels, temperature, and specific conductance.

Photo of Bird Bands in a Variety of Sizes and Types
Date Published: May 1, 2018
Status: Active

Bird Banding Laboratory

The Bird Banding Laboratory (BBL) is an integrated scientific program established in 1920 supporting the collection, archiving, management and dissemination of information from banded and marked birds in North America.  This information is used to monitor the status and trends of resident and migratory bird populations. Because birds are good indicators of the health of the environment, the...

heavy mineral sands
Date Published: April 2, 2018
Status: Active

Heavy-Mineral Sand Resources in the Southeastern U.S.

We are assessing the extent of industrial mineral resources hosted by heavy-mineral sands in the coastal plain of the southeastern United States. “Heavy-mineral sands" (HMS) is a term commonly used in industry and geologic literature to describe layered sediments deposited in coastal environments that contain dense (“heavy") minerals of economic value. The heavy minerals extracted from these...

Potential coastal change impacts for Hurricane Joaquin - Oct. 4, 2015
Date Published: March 28, 2018
Status: Completed

Hurricane Joaquin - Forecast and Documentation of Coastal Change

Hurricane Joaquin coastal change forecast and pre- and post-storm photos documenting coastal change.

A hardened shoreline (rip-rap revetment)
Date Published: March 14, 2018
Status: Completed

Shoreline Changes and Impacts to Natural Resources in Chesapeake Bay

This project aims to improve our understanding of the impacts of shoreline hardening on aquatic ecosystems.

Field Sampling Sites within the Delaware River Basin
Date Published: January 25, 2018
Status: Active

Quantifying Floodplain Ecological Processes and Ecosystem Services in the Delaware River Watershed

Floodplain and wetland areas provide critical ecosystem services to local and downstream communities by retaining sediments, nutrients, and floodwaters. The loss of floodplain functionality due to land use conversion and degradation reduces the provisioning of these services. Assessing, quantifying, and valuing floodplain ecosystem services provide a framework to estimate how floodplain...

coastal vulnerability of sea-level rise map
Date Published: January 18, 2018
Status: Active

National Assessment of Coastal Vulnerability to Sea Level Rise

The original national coastal vulnerability index (CVI) assessment was motivated by expected accelerated sea-level rise (SLR) and the uncertainty in the response of the coastline to SLR. This research was conducted between 1999 and 2001, and is currently being updated using new data sources and methodology. This original study was part of the ...

Oblique aerial photograph looking to the southwest along the southern end of Cedar Island, Virginia
Date Published: January 18, 2018
Status: Active

Long-Term Coastal Change

Goals of this task include developing and improving coastal-change assessments and supporting long-term planning and decision making to ensure sustainable coastal economies, infrastructure, and ecosystems.

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NWIS Mapper screenshot
March 5, 2019

The NWIS mapper provides access to over 1.5 million sites contained in the USGS National Water Information System (NWIS), including sites where current and historical surface-water, groundwater, springs, and atmospheric data has been collected. Users can search by site type, data type, site number, or place.

Interactive map and chart highlighting USGS Domestic Continuous (Unconventional) Oil & Gas Assessments, 2000-Present
August 28, 2018

Interactively explore assessment summary information for continuous (unconventional) assessments conducted at the USGS from 2000-2018. The assessment results data used to generate this visualization can be downloaded here in Excel Format.  These data represent all assessment results for Continuous Assessments only from 2000-2018.

Map of Submerged Lands
April 4, 2018

The USGS Coastal and Marine Geology Program (CMGP) Internet Map Server is an interactive mapping service which allows the user to explore and download GIS data sets published by CMGP.

Oblique Aerial Photography Viewer
January 19, 2018

Obique photos offer a unique perspective of the coast. Features such as beach erosion or accretion, dune erosion and overwash can all be clearly characterized in this imagery. It also documents coastal infrastructure, as well as the damage that infrastructure may incur as the result of an impacting hurricane. 

Pharmaceuticals in water, fish, and ospreys nesting in Delaware River and Bay
October 19, 2017

Exposure of wildlife to Active Pharmaceutical Ingredients (APIs) is likely to occur but evidence of hazard and risk is limited. One exposure pathway that has received attention is trophic transfer of APIs in a water-fish-osprey food chain. 

Application screenshot thumbnail
September 1, 2017

The National Water Information System (NWIS) web application provides access to real-time and historical surface-water, groundwater, water-quality, and water-use data collected at approximately 1.5 million sites across all 50 states.

Coastal Change Hazards Portal Interactive Mapper screen grab
August 24, 2017

Interactive access to coastal change science and data for our Nation’s coasts. Information and products are organized within three coastal change hazard themes: 1) extreme storms, 2) shoreline change, and 3) sea-level rise. Displays probabilities of coastal erosion.

MD General Image 1
September 29, 2016

Real-time, daily, peak-flow, field measurements, and statistics of current and historical data that describe stream levels, streamflow (discharge), reservoir and lake levels, surface-water quality, and rainfall in Maryland. 

Water Supply Manhole Cover
September 29, 2016

Data from wells, springs, and other groundwater sources in Delaware; well location data includes information such as latitude and longitude, well depth, and aquifer. Groundwater level data are collected and stored as either discrete field-water-level measurements or as continuous time-series data from automated recorders.

Structure datasets for the nation from The National Map
April 20, 2016

USGS data portray selected structures data, including the location and characteristics of manmade facilities. Characteristics consist of a structure's physical form (footprint), function, name, location, and detailed information about the structure. The types of structures collected are largely determined by the needs of the disaster planning and response and homeland security organizations.

Boundaries datasets for the nation from The National Map.
April 19, 2016

Boundaries data or governmental units represent major civil areas including states, counties, Federal, and Native American lands, and incorporated places such as cities and towns.

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Application to explore US Oil and Gas Assessments
March 19, 2019

This map shows the provinces assessed by the USGS for undiscovered oil and gas resources. 

Digital Elevation Model in the Atchafalaya Basin, LA
April 19, 2016

The 3DEP products and services available through The National Map consist of standard digital elevation models (DEMs) at various horizontal resolutions, elevation source and associated datasets, an elevation point query service and bulk point query service. All 3DEP products are available, free of charge and without use restrictions.

Map of Submerged Lands
March 15, 2016

Links to publications that contain maps of the sea floor or lake beds and the digital data used to create them.

USGS Storm-Tide Mapper and Data Services
March 8, 2016

The USGS Storm Tide Mapper is a tool for viewing, analyzing, and accessing storm tide data collected during and after hurricanes and Nor’easters. The USGS Storm Tide Mapper will continue to provide a unified and consistent source of real-time and archived storm-tide data.

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Year Published: 2016

High-resolution geophysical data collected along the Delmarva Peninsula, 2014, USGS Field Activity 2014-002-FA

The Delmarva Peninsula is a 220-kilometer-long headland, spit, and barrier island complex that was significantly affected by Hurricane Sandy. A U.S. Geological Survey cruise was conducted in the summer of 2014 to map the inner continental shelf of the Delmarva Peninsula using geophysical and sampling techniques to define the geologic framework...

Pendleton, Elizabeth; Ackerman, Seth D.; Baldwin, Wayne E.; Danforth, William W.; Foster, David S.; Thieler, E. Robert; Brothers, Laura L.
Pendleton, E.A., Ackerman, S.D., Baldwin, W.E., Danforth, W.W., Foster, D.S., Thieler, E.R., and Brothers, L.L. 2015, High-resolution geophysical data collected along the Delmarva Peninsula, 2014, USGS Field Activity 2014-002-FA (ver. 2.0, March 2015): U.S. Geological Survey data release. http://dx.doi.org/10.5066/F7MW2F60

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Year Published: 2016

Sensitivity of the projected hydroclimatic environment of the Delaware River basin to formulation of potential evapotranspiration

The Delaware River Basin (DRB) encompasses approximately 0.4 % of the area of the United States (U.S.), but supplies water to 5 % of the population. We studied three forested tributaries to quantify the potential climate-driven change in hydrologic budget for two 25-year time periods centered on 2030 and 2060, focusing on sensitivity to...

Williamson, Tanja N.; Nystrom, Elizabeth A.; Milly, Paul C.D.
Williamson T.N., Nystrom E.A., Milly P.C.D. 2016. Sensitivity of the projected hydroclimatic environment of the Delaware River basin to formulation of potential evapotranspiration. Climatic Change 139:215-228. DOI: 10.1007/s10584-016-1782-2.

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Year Published: 2015

U.S. Geological Survey Chesapeake science strategy, 2015-2025—Informing ecosystem management of America’s largest estuary

Executive Summary The U.S. Geological Survey (USGS) has the critical role of providing scientific information to improve the understanding and management of the Chesapeake Bay ecosystem. The USGS works with Federal, State, and academic science partners to provide research and monitoring, and communicate results of these activities to enhance...

Phillips, Scott; Blomquist, Joel D.; Phillips, Scott; Blomquist, Joel D.; Bennett, Mark; Berlin, Alicia; Blazer, Vicki; Claggett, Peter; Faulkner, Stephen; Hyer, Kenneth; Ladino, Cassandra; Moyer, Douglas; Muir, Rachel; Noe, Gregory B.; Phillips, Patrick J.
Phillips, Scott, and Blomquist, Joel, eds., 2015, U.S. Geological Survey Chesapeake science strategy, 2015–2025—Informing ecosystem management of America’s largest estuary: U.S. Geological Survey Open-File Report 2015–1162, 43 p., http://dx.doi.org/10.3133/ofr20151162.

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Year Published: 2008

Algal and Invertebrate Community Composition along Agricultural Gradients: A Comparative Study from Two Regions of the Eastern United States

Benthic algal and invertebrate communities in two Coastal Plain regions of the Eastern United States?the Delmarva Peninsula (27 sites) and Georgia Upper Coastal Plain (29 sites)?were assessed to determine if aspects of agricultural land use and nutrient conditions (dissolved and whole-water nitrogen and phosphorus) could be linked to biological...

Calhoun, Daniel L.; Gregory, M. Brian; Weyers, Holly S.
Algal and Invertebrate Community Composition along Agricultural Gradients: A Comparative Study from Two Regions of the Eastern United States; 2008; SIR; 2008-5046; Calhoun, Daniel L.; Gregory, M. Brian; Weyers, Holly S.

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Year Published: 2007

Development of Relations of Stream Stage to Channel Geometry and Discharge for Stream Segments Simulated with Hydrologic Simulation Program-Fortran (HSPF), Chesapeake Bay Watershed and Adjacent Parts of Virginia, Maryland, and Delaware

The U.S. Geological Survey (USGS), U.S. Environmental Protection Agency (USEPA), Chesapeake Bay Program (CBP), Interstate Commission for the Potomac River Basin (ICPRB), Maryland Department of the Environment (MDE), Virginia Department of Conservation and Recreation (VADCR), and University of Maryland (UMD) are collaborating to improve the...

Moyer, Douglas; Bennett, Mark
Development of Relations of Stream Stage to Channel Geometry and Discharge for Stream Segments Simulated with Hydrologic Simulation Program-Fortran (HSPF), Chesapeake Bay Watershed and Adjacent Parts of Virginia, Maryland, and Delaware; 2007; SIR; 2007-5135; Moyer, Douglas L.; Bennett, Mark R.

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Year Published: 2006

Estimated ground-water availability in the Delaware River basin, 1997-2000

Ground-water availability using a watershed-based approach was estimated for the 147 watersheds that make up the Delaware River Basin. This study, conducted by the U.S. Geological Survey in cooperation with the Delaware River Basin Commission (DRBC), supports the DRBC's Water Resources Plan for the Delaware River Basin. Different procedures were...

Sloto, Ronald A.; Buxton, Debra E.
Estimated ground-water availability in the Delaware River basin, 1997-2000; 2006; SIR; 2006-5125; Sloto, Ronald A.; Buxton, Debra E.

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Year Published: 2006

Deciphering igneous and metamorphic events in high-grade rocks of the Wilmington complex, Delaware: Morphology, cathodoluminescence and backscattered electron zoning, and SHRIMP U-Pb geochronology of zircon and monazite

High-grade rocks of the Wilmington Complex, northern Delaware and adjacent Maryland and Pennsylvania, contain morphologically complex zircons that formed through both igneous and metamorphic processes during the development of an island-arc complex and suturing of the arc to Laurentia. The arc complex has been divided into several members, the...

Aleinikoff, J.N.; Schenck, W.S.; Plank, M.O.; Srogi, L.A.; Fanning, C.M.; Kamo, S.L.; Bosbyshell, H.
Deciphering igneous and metamorphic events in high-grade rocks of the Wilmington complex, Delaware: Morphology, cathodoluminescence and backscattered electron zoning, and SHRIMP U-Pb geochronology of zircon and monazite; 2006; Article; Journal; Bulletin of the Geological Society of America; Aleinikoff, J. N.; Schenck, W. S.; Plank, M. O.; Srogi, L. A.; Fanning, C. M.; Kamo, S. L.; Bosbyshell, H.

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Year Published: 1999

Freshwater use in Delaware, 1995

Wheeler, Judith C.
Freshwater use in Delaware, 1995; 1999; FS; 126-99; Wheeler, Judith C.

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Year Published: 1990

National water summary 1987: Hydrologic events and water supply and use

Water use in the United States, as measured by freshwater withdrawals in 1985, averaged 338,000 Mgal/d (million gallons per day), which is enough water to cover the 48 conterminous States to a depth of about 2.4 inches. Only 92,300 Mgal/d, or 27.3 percent of the water withdrawn, was consumptive use and thus lost to immediate further use; the...

Carr, Jerry E.; Chase, Edith B.; Paulson, Richard W.; Moody, David W.
Attribution: Water, Central Midwest Water Science Center, Dakota Water Science Center, , , Kansas Water Science Center, Minnesota Water Science Center, Pennsylvania Water Science Center, Texas Water Science Center, Utah Water Science Center, , Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center, Water Resources, Water Availability and Use Science Program, Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Puerto Rico, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, U.S. Virgin Islands, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming, United States of America
National water summary 1987: hydrologic events and water supply and use; 1990; WSP; 2350; Carr, Jerry E.; Chase, Edith B.; Paulson, Richard W.; Moody, David W.

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Year Published: 1990

Water use in the St Jones River basin, Kent County, Delaware, 1983-86

Phelan, D.J.
Water use in the St Jones River basin, Kent County, Delaware, 1983-86; 1990; WRI; 90-4094; Phelan, D. J.

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Image from an application that navigates users through USGS National Oil and Gas Assessment Provinces
November 14, 2018

National Oil and Gas Assessment Provinces

This is a graphic from the USGS National Oil and Gas Assessment Explorer application, which allows user to drill into 70 oil and gas assessment provinces throughout the United States.

Image shows USGS scientists in PFDs collecting a seismic airgun while at sea
September 6, 2018

Retrieving Seismic Airguns

USGS personnel on the deck of the R/V Hugh R. Sharp during retrieval of seismic airguns.  The streamer that receives the seismic signals generated by the airguns is towed behind the ship and is here shown

...
September 30, 2017

USGS Hurricane Preparedness

Before a hurricane, USGS Scientists undertake a data collection effort of a grand scale. They install a temporary mobile network of sensors along the coasts to collect additional data on the intensity of storm surge, one of the most dangerous elements of a hurricane. This effort provides critical information that allows various USGS partners and emergency responders to

...
Satellite image showing the Delaware Bay and Chesapeake Bay region
January 25, 2017

Satellite Image of the Delaware Bay and Chesapeake Bay Region

This Indian Space Research Organization LISS-3 image of the Delaware Bay and Chesapeake Bay region, acquired on January 25, 2017, shows the landscape along the densely populated U.S. East coast. Ecosystems and sea-level rise are among the regional landscape changes that satellite imagery helps to monitor. 

As US models predicted Hurricane Joaquin washed out a road at Kitty Hawk, NC in 2015.
June 1, 2016

Hurricane erodes N.C. road

As US models predicted Hurricane Joaquin washed out a road at Kitty Hawk, NC in 2015.

High waves and storm surge eroded the front of the man-made dune
October 7, 2015

Oblique aerial photographs of Rehoboth Beach, Delaware

Oblique aerial photographs of Rehoboth Beach, Delaware. View looking west along the Delaware shore. High waves and storm surge from Hurricane Joaquin eroded the front of the man-made dune, exposing a layer of darker, heavier sediment (green arrow). The outfall pipe also became exposed as the beach face eroded. The yellow arrow in each image points to the same feature.

High waves and storm surge eroded the dune toe resulting in a steep dune scarp
October 7, 2015

Oblique aerial photographs of Bethany Beach, Delaware

Oblique aerial photographs of Bethany Beach, Delaware. View looking west along the Delaware shore. High waves and storm surge from Hurricane Joaquin eroded the dune toe resulting in a steep dune scarp (green arrow). The yellow arrow in each image points to the same feature.

High waves from Hurricane Joaquin eroded and narrowed the beach
October 7, 2015

Oblique aerial photographs of South Bethany, Delaware

Oblique aerial photographs of South Bethany, Delaware. View looking west along the Delaware shore. High waves from Hurricane Joaquin eroded and narrowed the beach. Sand from the beach was transported offshore forming a sand bar (green arrow), and inland covering dune vegetation (blue arrow). The yellow arrow in each image points to the same feature. 

Storm waves and surge have eroded the reconstructed dune seen in the upper image
October 7, 2015

Oblique aerial photographs of South Bethany, Delaware

Oblique aerial photographs of South Bethany, Delaware. View looking west along the Delaware shore. Storm waves and surge have eroded the reconstructed dune seen in the upper image (area fenced off and planted with grass) and left a steep dune scarp (green arrow). The yellow arrow in each image points to the same feature.

Potential coastal change impacts for Hurricane Joaquin - Oct. 4, 2015
October 4, 2015

Potential coastal change impacts for Hurricane Joaquin - Oct. 4, 2015

Screen shot of the Coastal Change Hazards Portal showing potential coastal change impacts during a direct landfall of Hurricane Joaquin based on NHC Advisory 27, 0800 AM EDT SUN OCT 04 2015.

Three osprey (Pandion haliaetus) nestlings
June 10, 2015

Three osprey (Pandion haliaetus) nestlings in Coastal Inland Bays

Three osprey (Pandion haliaetus) nestlings in Coastal Inland Bays, Rehoboth, Delaware in 2015.

Two osprey (Pandion haliaetus) nestlings
June 10, 2015

Two osprey (Pandion haliaetus) nestlings in Coastal Inland Bays

Two osprey (Pandion haliaetus) nestlings in Coastal Inland Bays, Rehoboth, Delaware in 2015.

Filter Total Items: 74
Photograph of a sonobuoy launch
September 20, 2018

Data acquired by the U.S. Geological Survey on the U.S. Atlantic Margin in August 2018 reveal new information about the distribution of gas hydrates in the sector stretching from the upper continental slope to deep water areas offshore New Jersey to North Carolina.

Two osprey nestlings in the Delaware Estuary
July 10, 2018

Lower levels of environmental contaminants—including pesticides, flame retardants and other pollutants—were recently found in osprey eggs in the Delaware Estuary compared to those tested from the 1970s through the early 2000s. 

Nor'easter
March 1, 2018

USGS field crews are deploying storm-tide and wave sensors today from Maine to Delaware to track and study a Nor’easter forecasted to begin tomorrow.

Map showing the M4.1 earthquake epicenter near Dover, DE
November 30, 2017

The USGS has up-to-date details on the November 30, 2017 event.

Image shows a geologic map of the Lower 48
August 21, 2017

A carbonatite here, a glacial moraine there, a zig-zagging fault or two, even a behemoth of a batholith. The geology of the 50 States is an enormous patchwork of varied forms, beautiful in their variance but challenging to present as a single map.

Photo of a young girl drinking water, which likely originated from groundwater sources. 
January 19, 2017

A regional assessment of untreated groundwater in the Northern Atlantic Coastal Plain aquifer system in the eastern United States is now available from the U.S. Geological Survey.

USGS: Science for a changing world
September 6, 2016

Threats to groundwater availability and sustainability in the Northern Atlantic Coastal Plain are dependent to a large degree by the type of aquifers used for water supply, according to a new regional assessment by the U.S. Geological Survey.

Stream Gage in Maryland
July 13, 2016

Vital coastal storm-tide information needed to help guide storm response efforts following major storms affecting Maryland will be more accessible than ever due to a new monitoring network the U.S. Geological Survey is currently building.

For more information, see http://md.water.usgs.gov/usgs-news.html

 

Image: Methane Seeps along Offshore Virginia
June 16, 2016

Recent scientific work has confirmed the source, composition and origin of methane seeps on the Atlantic Ocean seafloor, discovered in 2012, where scientists never expected them to be.

As US models predicted Hurricane Joaquin washed out a road at Kitty Hawk, NC in 2015.
June 1, 2016

New USGS models help predict storm effects on beaches

As the 2016 hurricane season opens, weather forecasters, emergency managers and coastal residents have access to tools developed by the U.S. Geological Survey that predict, more precisely than ever, where beach erosion and beachfront flooding will take place during hurricanes and other storms.

 

Map of the 48 contiguous states showing Microcystin concentrations
May 31, 2016

First-of-its-kind survey shows that algal toxins are found nationwide

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