San Francisco is full of … well, it.

This isn’t a reference to the trash-talking between Golden State Warriors fans and Los Angeles Laker diehards over LeBron James.

It’s not even regarding the ongoing culinary rivalry that San Francisco has with foodies in New York City.

And it certainly has nothing to do with the criticism Bay Area politics receives from conservatives across the country on a daily basis.

Rather, as a statement of fact, in the most literal possible sense — San Francisco is full of excrement.

According to a recent NBC Bay Area investigation, an alarming amount of trash, used drug needles and feces are clogging San Francisco’s streets.

The report centered around a 153-block survey of downtown, which, according to the report, “revealed trash on every block, 100 needles and more than 300 piles of feces along the 20-mile stretch of streets and sidewalks.”

Talk about a slice of Norman Rockwell’s America.

After the report aired, NBC caught up with newly elected San Francisco mayor, London Breed, and asked her what she plans on doing to combat this emerging public health crisis. Breed told the Peacock Network that she is working with homeless advocacy organizations that receive funding from the city to better educate the homeless to stop trashing the city.

“I work hard to make sure your programs are funded for the purposes of trying to get these individuals help, and what I am asking you to do is work with your clients and ask them to at least have respect for the community — at least, clean up after themselves and show respect to one another and people in the neighborhood,” Breed told KNTV.

When asked by KNTV if her plan calls for stronger penalties against those who litter or defecate in public, Breed said “I didn’t express anything about a penalty.” Rather, the mayor said she has encouraged nonprofits “to talk to their clients, who, unfortunately, were mostly responsible for the conditions of our streets.”

Who has time to crack down on the louts who are littering the streets with hypodermic needles or defecating in public? Someone, somewhere might be using a plastic straw! Priorities, people!

If the mayor plans on using all carrots and no sticks to solve this problem, she’s going to have to get very creative.

Maybe Mayor Breed could model a program based on the city’s successful gun buyback event. The city’s last installment offered $100 for every handgun and $200 for every assault weapon, no questions asked.

Imagine if the city offered a $100 gift card to Crate and Barrel for every ziplock bag filled with human waste dropped off at City Hall and $200 for every Hefty bag?

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Dr. Kelly Victory is a trauma and emergency medicine specialist and public health and healthcare policy expert. She tells me that San Francisco had better do something about this crisis pronto. “Human waste on the street poses an enormous public health risk; feces can transmit numerous bacterial infections, including cholera, a multitude of viral infections (including norovirus, which people associate with food poisoning outbreaks on cruise ships), hepatitis A, various parasitic diseases and worms,” she warned.

“In addition to the risk directly incurred by pedestrians, city workers, shop owners, etc., these people unknowingly pick up fecal remnants on their shoes and then transfer it to their businesses, cars, public transportation and homes. To complicate matters further, when the rain comes, it washes all of that material into the city’s drainage system. In other words, the poop — and the nastiness it contains — doesn’t stay where it was laid,” Victory said.

If Mayor Breed doesn’t get this under control soon the City by the Bay will soon be known as the something else by the bay … and that’s not good for anyone.

John Phillips can be heard weekdays at 3 p.m. on “The Drive Home with Jillian Barberie and John Phillips” on KABC/AM 790. Follow him on Twitter: @JohnnyDontLike