What appears to be pristine water in San Diego Bay is hiding a disturbing secret beneath the surface. University of San Diego graduate students working with a local company have discovered alarming levels of heavy metals, microplastics and invasive species in Mission Bay and San Diego Bay using innovative cleanup booms made from recycled materials. The partnership, called 24/7 Blue, pairs USD students with San Diego-based Earthwise Sorbents to test sustainable cleanup technology that could serve as a model for ports and marinas nationwide. … [E]xpansion plans include South Bay areas plagued by Tijuana sewage pollution.

Other South Bay and San Diego Bay news:

• CBS8 (San Diego): Experts tour Tijuana River Valley, urge action on cross-border pollution