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Early August 2019 Hypoxia Report

Maryland Department of Natural Resources monitoring data show that dissolved oxygen conditions in the Maryland portion of the Chesapeake Bay mainstem were larger than average in early August. The hypoxic water volume (areas with less than 2 mg/l oxygen) was 1.77 cubic miles in early August, down from the 2.01 cubic miles seen in late  Read the Rest…


July 2019 Hypoxia Report

Maryland Department of Natural Resources monitoring data show that dissolved oxygen conditions in the Maryland portion of the Chesapeake Bay mainstem were larger than average in July, as the result of many factors. The hypoxic water volume (areas with less than 2 mg/l oxygen) was 1.92 cubic miles in early July and 2.01 cubic miles  Read the Rest…


Late June 2019 Hypoxia Report

Maryland Department of Natural Resources monitoring shows that dissolved oxygen conditions in the state’s portion of the Chesapeake Bay mainstem were better than expected in late June. The hypoxic water volume — areas with less than 2 mg/l oxygen — was 0.69 cubic miles, which is well below the late June 1985-2018 average of 1.15  Read the Rest…


Early June 2019 Hypoxia Report

Dissolved oxygen conditions in the Maryland portion of the Chesapeake Bay mainstem were slightly above the long-term average in early June. The hypoxic water volume — areas with less than 2 mg/l oxygen — was 1.14 cubic miles, which is slightly above the early June 1985-2018 average of 0.93 cubic miles and similar to levels  Read the Rest…


Summer 2018 Hypoxia Report

Average Year for Chesapeake Bay Dissolved Oxygen Dissolved oxygen conditions for the Maryland portion of Chesapeake Bay for the summer of 2018 were average compared to the long-term average from 1985-2017, reports the Maryland Department of Natural Resources. Low dissolved oxygen volume averaged 0.97 cubic miles from June through September. Crabs, fish, oysters and other  Read the Rest…


August 2018 Hypoxia Report

Dissolved oxygen conditions for Maryland’s portion of Chesapeake Bay returned to near average for the month of August, reports the Maryland Department of Natural Resources. The department tracks hypoxia throughout the summer during twice monthly monitoring cruises. Low dissolved oxygen volume was at a record low (0.26 cubic miles) in late July, due to sustained  Read the Rest…



Late July 2018 Hypoxia Report

Heavy Rainfall and Sustained Winds Helped Produce Best Recorded Results Ever Due to extreme summer weather, dissolved oxygen conditions in Maryland’s portion of the Chesapeake Bay mainstem were the best ever observed in late July, reports the Maryland Department to Natural Resources. The department tracks hypoxia throughout the summer during twice monthly monitoring cruises. The  Read the Rest…


Early July 2018 Hypoxia Report

Dissolved oxygen conditions in Maryland’s portion of the Chesapeake Bay mainstem improved in early July, according to the Maryland Department of Natural Resources. The department tracks hypoxia throughout the summer during twice monthly monitoring cruises. The hypoxic water volume (areas with less than 2 mg/l oxygen) was 1.05 cubic miles, nearly 0.6 cubic miles less  Read the Rest…


Late June 2018 Hypoxia Report

As anticipated, dissolved oxygen conditions in Maryland’s portion of the Chesapeake Bay mainstem worsened in late June. During its twice monthly monitoring cruises, the Maryland Department of Natural Resources found that hypoxic water volume (areas with less than 2 mg/L oxygen) was 1.63 cubic miles, which is 42 percent greater than the late June average  Read the Rest…


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AccessDNR November 2019

The November 2019 edition of a monthly video newsletter hosted by Gregg Bortz.

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