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.
Chloride concentrations in streams in forested areas in New England tend to be low, as there are limited geological sources of chloride. However, in recent years U.S. Geological Survey studies have documented increasing chloride concentrations and loads in streams in New England (Savoie and others, 2017; Mullaney, 2016). The increases in chloride concentrations and loads can be attributed to the following sources: deicing salts applied to public roads and private property, and discharges from wastewater treatment facilities and on-site septic systems. Less important sources include atmospheric deposition, the use of salts for water softening, and potassium chloride in agricultural fertilizers (Mullaney and others, 2009). Salt for deicing is the largest end use of salt in the United States (Bolen, 2021).
Recent and historical data for active water-quality monitoring stations on streams in Connecticut, Massachusetts and Rhode Island can be viewed at https://newengland.water.usgs.gov/web_app/chloride/Clmap.html.
References
Bolen, W.P., 2021, 2017 minerals yearbook—Salt [Advance Release]: U.S. Geological Survey, accessed on June 24, 2022 at https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/atoms/files/myb1-2017-salt.pdf
Mullaney, J.R., 2016, 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: U.S. Geological Survey Scientific Investigations Report 2015–5189, 47 p., http://dx.doi.org/10.3133/sir20155189.
Mullaney, J.R., Lorenz, D.L., Arntson, A.D., 2009, Chloride in groundwater and surface water in areas underlain by the glacial aquifer system, northern United States: U.S. Geological Survey Scientific Investigations Report 2009–5086, 41 p., https://pubs.usgs.gov/sir/2009/5086.
Savoie, J.G., Mullaney, J.R., and Bent, G.C., 2017, Analysis of trends of water quality and streamflow in the Blackstone, Branch, Pawtuxet, and Pawcatuck Rivers, Massachusetts, and Rhode Island, 1979 to 2015: U.S. Geological Survey Scientific Investigations Report 2016–5178, 43 p., https://doi.org/10.3133/sir20165178.
Water-quality trends in the Scituate reservoir drainage area, Rhode Island, 1983-2012
Water quality in the Cambridge, Massachusetts, drinking-water source area, 2005-8
Concentration, flux, and the analysis of trends of total and dissolved phosphorus, total nitrogen, and chloride in 18 tributaries to Lake Champlain, Vermont and New York, 1990–2011
Concentrations of chloride and sodium in groundwater in New Hampshire from 1960 through 2011
Characterization of major-ion chemistry and nutrients in headwater streams along the Appalachian National Scenic Trail and within adjacent watersheds, Maine to Georgia
Surface-water, water-quality, and meteorological data for the Cambridge, Massachusetts, drinking-water source area, water years 2007-08
Effects of Highway Road Salting on the Water Quality of Selected Streams in Chittenden County, Vermont, November 2005-2007
Chloride in Groundwater and Surface Water in Areas Underlain by the Glacial Aquifer System, Northern United States
Estimating Concentrations of Road-Salt Constituents in Highway-Runoff from Measurements of Specific Conductance
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.
Chloride concentrations in streams in forested areas in New England tend to be low, as there are limited geological sources of chloride. However, in recent years U.S. Geological Survey studies have documented increasing chloride concentrations and loads in streams in New England (Savoie and others, 2017; Mullaney, 2016). The increases in chloride concentrations and loads can be attributed to the following sources: deicing salts applied to public roads and private property, and discharges from wastewater treatment facilities and on-site septic systems. Less important sources include atmospheric deposition, the use of salts for water softening, and potassium chloride in agricultural fertilizers (Mullaney and others, 2009). Salt for deicing is the largest end use of salt in the United States (Bolen, 2021).
Recent and historical data for active water-quality monitoring stations on streams in Connecticut, Massachusetts and Rhode Island can be viewed at https://newengland.water.usgs.gov/web_app/chloride/Clmap.html.
References
Bolen, W.P., 2021, 2017 minerals yearbook—Salt [Advance Release]: U.S. Geological Survey, accessed on June 24, 2022 at https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/atoms/files/myb1-2017-salt.pdf
Mullaney, J.R., 2016, 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: U.S. Geological Survey Scientific Investigations Report 2015–5189, 47 p., http://dx.doi.org/10.3133/sir20155189.
Mullaney, J.R., Lorenz, D.L., Arntson, A.D., 2009, Chloride in groundwater and surface water in areas underlain by the glacial aquifer system, northern United States: U.S. Geological Survey Scientific Investigations Report 2009–5086, 41 p., https://pubs.usgs.gov/sir/2009/5086.
Savoie, J.G., Mullaney, J.R., and Bent, G.C., 2017, Analysis of trends of water quality and streamflow in the Blackstone, Branch, Pawtuxet, and Pawcatuck Rivers, Massachusetts, and Rhode Island, 1979 to 2015: U.S. Geological Survey Scientific Investigations Report 2016–5178, 43 p., https://doi.org/10.3133/sir20165178.