Regional analysis of the effect of paved roads on sodium and chloride in lakes

► Lake Na and Cl concentrations in least impacted watersheds in the AP are very low. ► Road salt has increased Na and Cl concentrations by about one order of magnitude. ► NYSDOT (state) roads are the greatest contributors to lake salinization. ► The contribution of state roads to salinization relates to distance from shoreline. ► Road segment to consider treating differently can be identified.