Division of Water Quality

Green Scum: Harmful Algal Bloom Examples

Harmful algal blooms may appear as thick, dark-green scum in the water.

Harmful Algal Bloom Examples: "Green Scum" from East Canyon Reservoir in 2019
Harmful Algal Bloom Examples: "Green Scum" from Scofield Reservoir in 2019
Harmful Algal Bloom Examples: "Green Scum" from Mantua Reservoir in 2019