Meant to filter storm water, LA’s bioswales are now dumping grounds

This story first appeared on The LA Local.

Across from an auto shop on Venice Boulevard and Albany Street sits a narrow, sunken strip of land lined with overgrown shrubs and cacti. It’s mostly filled with trash — from plastic bags and cups to containers, straws, chip bags and aluminum foil.

It’s original purpose was to capture and filter storm water runoff, helping reduce flooding and keep pollutants from flowing into the ocean. But neighbors in Pico Union say that this bioswale and many others across the city have become dumping grounds.

The sidewalk features were installed during former Mayor Eric Garcetti’s Complete Streets program around 2018. The initiative aimed to improve streets, add greenery and better manage stormwater along key corridors across the city.

Local resident Aurora Corona — a longtime Pico Union community organizer involved in local environmental and cleanup efforts — said in some instances it looks like the bioswales were not fully installed.

Citywide, there are about 23 bioswales that appear abandoned, Corona said. Many are located in central and South Los Angeles and spread across at least eight council districts.

In some cases, the concrete structures were installed but left without vegetation for years, Corona said, raising concerns that they were never able to function as intended.

Heberto Portobanco, owner of the Nicaraguan restaurant Portobanco in Pico Union, first noticed the bioswale outside his business about eight years ago, but it became hard to ignore about two years ago when it became a hazard.

“We had an accident, one of the people who does maintenance for us came and fell into it,” he said.

The bioswale was deeper and not fully finished, Portobanco said. After multiple people reported what happened to the city, Portobanco said the city added more soil to level it out.

“The idea might be nice, but if it’s not maintained, it’s a problem,” Portobanco said.

The biggest concern for Portobanco remains safety, especially as he said that people continue to use the space improperly or fail to notice it altogether.

He would be willing to help maintain the bioswale outside his restaurant if the city created a formal program to do so.

For him, keeping the space clean is also about pride and perception.

“I don’t want people to think that Latinos are careless and that we don’t take care of our surroundings,” he said, adding that a well-kept space could encourage others to take better care of the neighborhood.

Corona, the local organizer, has experienced similar issues to the ones Portobanco described. 

She lives near two bioswales, including the one near Portobanco’s restaurant.

She first encountered them while organizing a cleanup around 2024 and said she didn’t initially know what they were. What she did know was that they were not being taken care of.

“I was tired of seeing this being a dumping ground, they would just throw trash here all the time,” she said.

That frustration pushed her to take action. She thought of what she had already done with other public spaces in her community.

In 2024, she helped transform a neglected dirt space on Venice Boulevard and Union Avenue into a small community green area — also known as a median — using local grant funding. With the help of volunteers, they removed contaminated soil and planted drought-tolerant greenery.

“It’s only been here since November and it’s grown a lot,” she said about the green belt, pointing to plants that started as small pots and are now taking root.

Corona continues to organize cleanups and, through the city’s “Adopt-a-Median” program, works with neighbors to maintain the space. She said she’d like to see a similar model applied to bioswales — essentially an “Adopt-a-Bioswale” program that would allow residents to take ownership of the ones near them.

“I think people would step up if they were given the chance and the support,” she said.

Across from an auto shop on Venice Boulevard and Albany Street sits a narrow, sunken strip of land lined with overgrown shrubs and cacti. It’s mostly filled with trash — from plastic bags and cups to containers, straws, chip bags and aluminum foil.

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Marina Peña

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The LA Local

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The program for the bioswales, as she envisions it, would involve planting California natives such as dudleya edulis, dudleya pulverulenta and other species that can withstand the weather. It would also call for improving their visibility by painting the bioswale borders in colors that reflect the neighborhood.

That idea has already been discussed at the city level.

Steve Kang, president of the city’s Board of Public Works, agrees that many bioswales now sit “barren” and are treated as “more of a trash repository.” 

He said his office is now working to create a program similar to “Adopt-a-Median” that would allow community members and organizations to formally maintain bioswales.

“My intention is to make the process as seamless and easy as possible,” Kang said, adding that the goal is to launch the program sometime in 2026.

Under the proposal, participants would enter into agreements with the city, with support from the Office of Community Beautification, which can provide tools like gloves, trash bags and gardening supplies.

For residents like Corona and business owners like Portobanco, that kind of partnership could turn what are now neglected strips of land into something more useful. 

“If we take care of these spaces, they can become something people are proud of,” Corona said. “It changes how people see the neighborhood and how they treat it.”