1.0 DCPLUS 20210405 18360000 20220706 18360000 https://www.arcgis.com/sharing/rest/content/items/229afbc95ea348659bb02ad31944d724/info/thumbnail/ago_downloaded.png https://www.arcgis.com/home/item.html?id=229afbc95ea348659bb02ad31944d724 229afbc95ea348659bb02ad31944d724 Feature Service https://services.arcgis.com/cJ9YHowT8TU7DUyn/arcgis/rest/services/LTM_Site_Locations/FeatureServer Long-Term Monitoring Program Site Locations Feature Layer 2021-04-05T18:36:00 2022-07-06T12:14:15 water quality monitoring Water OAR OAP CAMD Feature Layer for Stream and Lake Sites in the Long-Term Monitoring Program   Surface water chemistry is a direct indicator of the effects of acid rain on water bodies. Networks that monitor surface water chemistry over long time periods provide valuable information on aquatic ecosystem health and how water bodies respond to changes in acid-causing emissions. EPA oversees the Long-Term Monitoring (LTM) program, which tracks changes in surface water chemistry in response to changing air emissions and acid deposition. <p style='background: white; font-variant-ligatures: normal; font-variant-caps: normal; text-align: start; text-decoration-style: initial; text-decoration-color: initial; word-spacing: 0px; margin: 12.0pt 0in 12.0pt 0in;'>The goal of this long-term program is to track whether the Clean Air Act Amendments (CAAA) have been effective in reducing the acidity of surface waters in New England, the Adirondack Mountains, Appalachian Plateau, and the Central Appalachians and advance the science of air pollution impacts on water resources. <p style='background: white; font-variant-ligatures: normal; font-variant-caps: normal; text-align: start; text-decoration-style: initial; text-decoration-color: initial; word-spacing: 0px; margin: 12.0pt 0in 12.0pt 0in;'>This feature layer shows the location of streams and lakes that are included in our annual trend analysis for our LTM program. <p style='background: white; font-variant-ligatures: normal; font-variant-caps: normal; text-align: start; text-decoration-style: initial; text-decoration-color: initial; word-spacing: 0px; margin: 12.0pt 0in 12.0pt 0in;'>LTM water quality data can be found at: <a href='https://doi.org/10.23719/1518546' target='_blank' rel='nofollow ugc noopener noreferrer'>https://doi.org/10.23719/1518546</a> <p style='background: white; font-variant-ligatures: normal; font-variant-caps: normal; text-align: start; text-decoration-style: initial; text-decoration-color: initial; word-spacing: 0px; margin: 12.0pt 0in 12.0pt 0in;'>LTM website can be found at: <a href='https://www.epa.gov/airmarkets/monitoring-surface-water-chemistry' target='_blank' rel='nofollow ugc noopener noreferrer'>https://www.epa.gov/airmarkets/monitoring-surface-water-chemistry</a> -81.8402 -68.05920000000002 46.001099999999994 36.570499999999996 1 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229afbc95ea348659bb02ad31944d724 https://services.arcgis.com/cJ9YHowT8TU7DUyn/arcgis/rest/services/LTM_Site_Locations/FeatureServer Feature Service EPSG