Two scientists who say they've developed a way to track the flow of ocean sewage from its source have found that San Diego is a worse polluter of Mexican coastal waters than Mexico itself.
Evidence of San Diego sewage can be traced along Baja California's Pacific Coast as far south as Ensenada, about 65 miles away, the researchers reported in the journal Environmental Science and Tech-nology.Sergio Sanuda-Wilhelmy, a University of California, Santa Cruz, doctoral candidate also affiliated with the Universidad Autonoma de Baja California in Ensenada, Mexico, collaborated with UC-Santa Cruz earth sciences professor Russell Flegal on the study.
The chronic contamination of water off San Diego by Mexican sewage is well-documented, and the consensus among marine scientists has been that San Diego sewage flows predominantly northward.
The two environmental toxicologists say their research disputes that notion of one-way sewage taint.