Photos of the Long Island Sound

Status and Trends: LISS Environmental Indicators

Type of Indicators: Health/Condition Response/Performance Socio-Economic Historical/Background


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

No Discharge Area

Areas designated as "no discharge zones" prohibit the release of sewage from any vessels. Sewage can damage habitats and be a major source of pathogens to the coastal environment. This map shows the areas in Long Island Sound designated as No Discharge Zones. View Indicator

Vessel Pump-out Stations

Vessel pump-out stations remove sewage from vessel holding tanks for onshore treatment. Their widespread availability is important to reducing the release of sewage by vessels into the Sound. This indicator reports the increased number of vessel pump-out stations in both states over the last 15 years. 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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