Dissolved Oxygen Maps for Summer 1998
Seven surveys were conducted between June 24 and September 17 in the summer of 1998. The maximum area affected by hypoxia during this time was 436 square kilometers (168 square miles). The entire hypoxic event lasted for 73 days from July 5 to September 15.
(Select map below to link to a larger image)
 June 24-26, 1998 |
 July 6-9, 1998 |
 July 21-23, 1998 |
 August 3-6, 1998 |
 August 17-21, 1998 |
 August 31-September 3, 1998 |
 September 15-17, 1998 |