Rockland County's water supply faces both quantity and quality issues. Despite the county's moderate population - only about 300,000 people - and fairly high annual rain and snowfall, there have been periodic droughts; reservoirs are relatively small compared to annual demand, and groundwater contamination is a problem in some areas. This web site addresses questions relevant to pressures on Rockland's water, and provides access to supporting information gathered from a variety of sources by a team at Columbia University's Lamont-Doherty Earth Observatory.