Hypoxia maps - Summer 2017

Emergency Burn Ban In Effect 10/26/24 - An emergency burn ban is now in effect for all Connecticut State Parks, Forests, and Wildlife Management areas, prohibiting the use of all outdoor grills, firepits, and campfires, and the kindling and use of flame outdoors. DEEP and local agencies are working to contain several active fires across the state. Please avoid all affected State Parks and Forests, as well as the blue-blazed Mattabesett Trail. The Enduro Trail in Voluntown and portions of North Stonington within the Pachaug State Forest are closed at this time. Please note that today's forest fire danger report remains at an 'extreme' level. More information about the current fire danger, burn ban and recommended safety measures can be found here

Dissolved Oxygen Maps for Summer 2017

During the summer of 2017, DEEP's Long Island Sound Water Quality Monitoring Program continues to monitor the extent of summertime hypoxia. The Program collects water samples for nutrient analysis and water quality parameters from 17 year round stations, as well as phytoplankton and zooplankton samples from 6 stations located throughout the Sound. An additional 30 stations are being sampled during the summer for dissolved oxygen to get a more accurate idea of the extent of hypoxia.

Maps showing the extent of low dissolved oxygen in Long Island Sound are posted as soon as possible after each survey.

Sampling dates are scheduled throughout the summer and into September if hypoxia persists beyond Labor Day. Select a sampling date below to view the progression of hypoxia in the western Sound throughout the summer.

July 31-August 2, 2017

August 14-16, 2017

August 28-September 1, 2017

Content last updated May 17, 2018

Connecticut Department of Energy & Environmental Protection