Water Quality

Existing highway-runoff data do not adequately address the informational needs of stormwater professionals in Connecticut because there have been relatively few studies of highway runoff in the Northeastern United States. Consequently, the U.S. Geological Survey, New England Water Science Center, in cooperation with Connecticut Department of Transportation (CTDOT), is conducting a 4-year project...

The U.S. Geological Survey New England Water Science Center, in cooperation with Massachusetts Department of Transportation (MassDOT), is evaluating how a type of porous pavement affects the discharge of suspended sediment in comparison to the asphalt surface commonly used on Massachusetts highways. The project will expand the understanding of highway runoff concentrations of suspended sediment...

The Cambridge Water Department supplies approximately 13 million gallons per day of drinking water to more than 100,000 customers. Raw water is obtained from a serial system of three primary storage reservoirs—Cambridge Reservoir (also known as the Hobbs Brook Reservoir), Stony Brook Reservoir, and Fresh Pond Reservoir—in parts of Cambridge, Lexington, Lincoln, Waltham, and Weston, Massachusetts...

During the past 20 years, nitrogen loads to Long Island Sound (LIS) have been substantially reduced in large watersheds affected by municipal wastewater loads.

Per- and polyfluoroalkyl substances (PFAS) are a diverse group of over 4,000 different compounds. Since the 1940s, PFAS have been manufactured and used around the globe, including in the United States. PFAS are resistant to chemical and thermal breakdown and impart stain and water-resistance properties, making them useful for a variety of commercial applications, but also persistent in the...

The term environmental streamflows refers to the magnitude, frequency, seasonal timing, duration, and rate of change of streamflows needed to sustain freshwater and estuary ecosystems and human wellbeing. It is important that environmental streamflow assessments by water managers consider changes in climate, land use, and water management; this cannot be done effectively without understanding...

The U.S. Geological Survey, in cooperation with the Massachusetts Department of Environmental Protection (MassDEP), is currently conducting a 4-year water-quality investigation in the lower portion of the Merrimack River watershed, April 2020 – October 2024.

Coastal estuaries in southern New England and New York show the effects of excess nutrients and coastal eutrophication. These include excessive growth of macroalgae, excessive blooms of phytoplankton, oxygen depletion, hypoxia and deteriorated substrates. State and Federal regulators have responded to these nutrient-caused impairments by requiring more stringent permit limits for National...

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.

The USGS, in cooperation with the Connecticut Department of Energy and Environmental Protection will be collecting water-quality and hydrologic data at four embayments from April 2021 to March 2024: Mystic, Norwalk, Saugatuck, and Sasco-Southport complex.

The New England Water Science Center collects data and does interpretive studies on hydrology, hydraulics, and water quality in cooperation with the Federal Highway Administration and State Departments of Transportation (DOTs) in New England and other states.

The Scituate Reservoir system is the largest inland body of water in Rhode Island and the principal drinking-water supply for more than 60 percent of the State’s population. The system includes the Scituate Reservoir and five tributary reservoirs with a maximum storage capacity of 37 billion gallons. The drainage basin that contributes water to the reservoir extends across 93 square miles in...