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Trends in Nitrate Concentrations in Public Water-Supply Wells, Suffolk County, New York, 1982-2008 Introduction High nitrate concentrations are a common concern among many purveyors, including the Suffolk County Water Authority (SCWA), the largest supplier of water to residents in Suffolk County. Typically, the amount of nitrate in groundwater is related to land use, where the greatest concentrations are observed in agricultural regions. In many areas, the nitrate concentration has increased steadily in recent years, even in areas that are no longer farmed and are now sewered. A statistical analysis for trends of over 20 years in nitrate concentration data from SCWA wells is needed to determine the susceptibility of supply-wells to exceed the Maximum Contaminant Level (MCL) for nitrate. This information is essential... Categories: Data, Project; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Contaminants, Natural, Contaminants, Natural, Contaminants, natural, Cooperative Water Program, GW Model, All tags... GW Model, GW model, GW or SW, GW or SW, GW or SW, Groundwater Monitoring, Groundwater Monitoring, Groundwater Monitoring, Groundwater Recharge, Groundwater Recharge, Groundwater and Streamflow Information, Groundwater and Streamflow Information, Groundwater recharge, Groundwater-Flow Modeling, Groundwater-Flow Modeling, Groundwater-Flow Modeling, New York, Suffolk County, Surface-Water Monitoring, Surface-Water Monitoring, Surface-Water Monitoring, USGS New York Water Science Center, WSC, Water Quality, Water Quality, Water Use and Availability Science, Water Use and Availability Science, Water quality, public water-supply wells, nitrate, Fewer tags Groundwater-Quality of Nassau County, Long Island, New York Problem Statement There are over 1.3 million residents in Nassau County that rely on groundwater as their sole source of potable drinking water. The mixed land uses (residential, commercial, industrial, agricultural, and recreational) of Nassau County contribute point and non-point sources of aquifer contamination. Nassau County water purveyors currently operate supply wells screened in the upper glacial, Magothy, and Lloyd aquifers. The protection and long-term sustainability of all three aquifers are vital concerns for the Nassau County Department of Public Works (NCDPW). Monitoring of groundwater for contaminants of emerging concern (CEC) associated with mixed land uses within these aquifers is necessary for... Categories: Data, Project; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Contaminants, Natural, Cooperative Water Program, Groundwater Recharge, Groundwater-Quality Monitoring, Groundwater-Quality Monitoring, All tags... Groundwater-Quality Monitoring, Long Island, Nassau County, New York, USGS New York Water Science Center, WSC, Water Quality, Water Quality, Fewer tags