Photos of the Long Island Sound

Research & Monitoring

Status and Trends: LISS Environmental Indicators


Approved Shellfish Acreage

This measure indicates whether water quality conditions in tidal rivers and coastal waters can support recreational and commercial shellfishing of oysters and clams. View Indicator

Beach Closures and Advisories

Beaches are closed when high abundances of pathogens (bacteria or viruses) are detected or when heavy rainfall results in a high risk of increased pathogens. A large number of beach closure days can be an indicator of a problem with pathogen contamination or of an unusually wet year. View Indicator

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