1. For an indefinite period, based upon water quality and sources of pollution.

2. Seasonally, where recreation or certain other activities in or adjacent to the area may cause pollution of the growing area during certain seasons of the year.

3. Conditionally, for finite periods of time, based on predictable pollution events. Such conditionally condemned areas may be closed by the State Health Commissioner without advance notice or a prior hearing, provided that a hearing is held within thirty days after the area is condemned, unless it is reopened within this period.