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Here’s Why You Might See Red Dye in the Water Near Del Mar Bluffs

Bluff erosion along the coastal city has shut down train travel and endangered beachgoers.

Now, a new test has been set up to understand how rainwater destabilizes the bluffs in Del Mar.

The San Diego Association of Governments, or SANDAG, is using red dye to color water and then flush it down the storm drains to see where the water runs out of the bluffs into the ocean.