DEEP: Hypoxia Maps - Summer 2004

Dissolved Oxygen Maps for Summer 2004

During the summer of 2004 the Long Island Sound Water Quality Monitoring Program continued the modified summertime hypoxia monitoring.  The Program collects samples for nutrient analysis and water quality parameters from 17 stations, as well as phytoplankton and zooplankton samples from 6 stations located throughout the Sound.  A cool weather pattern during most of the early summer lead to a late onset of severe hypoxia.  The maximum area affected by hypoxia for the summer of 2004 was 258 square miles during the August 19 - 23, 2004 survey.  In 2004 we adopted new water quality standards that set dissolved oxygen levels of 3.5 mg/L and below as hypoxic, the previous value was 3.0 mg/L.  Taking the change into account the hypoxic event for 2004 was just about average for area and is expected to be below average for duration.  

(Select map below to link to a larger image)

{Link to larger image of hypoxia map for August 31 - September 3, 2004}

August 31-September 3, 2004
{Link to larger image of hypoxia map for August 19-23, 2004}

August 19-23, 2004
{Link to larger image of hypoxia map for August 2-6, 2004}

August 2-6, 2004
 
{Link to larger image of hypoxia map for July 19-21, 2004}

July 19-21, 2004
{Link to larger image of hypoxia map for July 6-8, 2004}

July 6-8, 2004
{Link to larger image of hypoxia map for June 28-29, 2004}

June 28-29, 2004

Long Island Sound Water Quality Monitoring