Pacifica Beach Bacteria Mystery Solved: Human Feces Found

For decades, Linda Mar Beach in Pacifica has struggled with persistent fecal bacteria contamination, particularly at its southern end. Recent testing by the Linda Mar Water Quality Coalition has definitively identified human intestinal tract bacteria as the primary source, with levels found to be 30 to 40 times above the safe human health threshold. This breakthrough addresses a long-standing mystery about whether the contamination originated from humans, wildlife, or domestic animals.

Leading the investigation, retired biochemist John Keener suspects that leaky, obsolete orangeburg pipes, commonly used in sewer systems from the 1940s to 1970s, are the main culprit. The City of Pacifica acknowledges the seriousness of the issue and is actively replacing sewer mains while offering financial incentives for residents to replace aging sewer laterals connecting their properties to the main system. City officials have deemed addressing this problem a high priority.

While a swift resolution is not expected, ongoing efforts by various community groups, including the San Pedro Creek Watershed Coalition, are crucial. Environmentalists, residents, researchers, and surfers are all contributing to the renewed focus on cleaning up the contamination. Beachgoers planning to visit Linda Mar Beach are advised to heed warning signs and utilize areas north of the Taco Bell Cantina, especially during the rainy season.