[4] Three times the size of Central Park, the estuary covers about 2,500 acres,[5] with 60 ha of it being tidal channels.

Prior to 1994, foot traffic by illegal immigration was a major source of top soil erosion.

[6] The Tijuana River Estuary serves as a resting area for migratory birds for nearly 65 years, making it a popular destination for birdwatchers and photographers.

Using gas chromatography high-resolution mass spectrometry to screen organic chemicals, the researchers identified 6,978 compounds.

Occasional sewage flows from Goat Canyon and Smuggler’s Gulch enter the Estuary.

The wastewater entered through the river and sewage excess from broken pipelines flowed from the southern portion to the mouth.