SAN FRANCISCO (KGO) — Environmental Scientist Kayli Paterson from the San Francisco Estuary Institute is hitting the road with colleague David Peterson and a trunk full of water sampling robots.

“Yeah, I think the max we’ve ever done was five. But the sites are very close together. Oh, there it is. Hopefully it samples well,” says Paterson as she turns the mobile sampling lab onto a private oak-lined road.

They’re closing in on a watershed creek flowing through the hillsides near the San Andreas Lake reservoir, west of Highway 280 in Millbrae, part of the larger watershed that eventually drains into San Francisco Bay.

“So, we’ve got our sampler. Look at the battery. Hook that up, red and black. This is a 12-volt lithium battery, and it powers our sampler for probably about six to seven days,” she explains, showing off a self-contained unit miniaturized into a portable case.

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The black cases are their latest innovation in stormwater science. Robotic samplers anchor in key sections of the watershed to monitor not only flow, but also the chemicals and pollutants washing downstream toward the Bay.

“And this is a front-line pollution sampler. It’s getting the stormwater before it enters the Bay. And so, we want to know what’s coming into the Bay and getting these samplers out there in more locations will give us a better idea of where we might have issues, where a hotspot is, or maybe a previously unknown contaminant,” says Paterson.

“It’s important to get out that fast,” her colleague David Peterson adds. “You know, in these storms as they’re happening, because the water is picking up pollutants in real time, and we need to be there to capture them.”

When we first met Peterson several years ago, he and another Estuary Institute team were sampling water along the Bay shoreline by hand, a technique that’s still valuable. But to cover more ground, Kayli and a group of collaborators began developing the robotic samplers over recent storm seasons.

Kayli and David start by chaining the unit itself to a tree near the creek bank. The system employs remote-controlled pumps that draw samples from the creek and store them in onboard containers. The software controlling the volume and frequency can be operated from a phone app.

MORE: New study of San Francisco Bay fish confirms concentrations of PFAS aka ‘forever chemicals’

One of the key targets in this study is a group of so-called “forever chemicals” known as PFAS, synthetic compounds that persist in the environment and have been detected in widespread areas of the Bay.

“And we capture samples and send them off to analytics labs across the country. Typically, universities or private labs will process these for us,” Peterson explains.

For these two stormwater detectives, it’s a mission that requires a combination of speed and patience**, chasing flowing water** through creeks and storm drains, sampling as they go.

“So, we’re looking for areas – the point of this is to do source control. Ultimately, we want to be able to trace this back to a possible source,” says Kayli Paterson.

And potentially prevent a source of toxic pollution from reaching San Francisco Bay and our Bay Area ecosystem.

More than a dozen of the robots were given names in a special contest, including the Big Sipper and the Tubeinator.

The Denver Broncos are in the market for a running back.

Just two days after NFL Network’s Ian Rapoport reported that Denver wants to have the running back position addressed before the draft, Jonathan Jones of CBS Sports reported that the Broncos are “poised to make a splash” at running back during NFL free agency.

“Denver is the reason why the Jets used the franchise tag on Breece Hall rather than the transition tag, according to sources, making sure Denver wouldn’t get the opportunity to put together an offer the Jets would refuse to match,” Jones wrote for CBS Sports.

Jones said the Broncos would be an obvious potential landing spot for Kenneth Walker, and he noted that Travis Etienne could be a cheaper alternative. The Athletic’s Nick Kosmider also reported this week that Denver is expected to “closely examine” the RB market, and he name-dropped Walker, Etienne and Rico Dowdle.

One of the Seattle Seahawks’ biggest rivals delivered the first big shockwaves of the 2026 offseason.

Why Salk ‘blanched’ at a Seahawks Maxx Crosby trade proposal

Los Angeles Rams have agreed to a deal that would send four draft picks to the Kansas City Chiefs in exchange for All-Pro cornerback and former UW Huskies standout Trent McDuffie, according to a report from ESPN’s Adam Schefter on Wednesday morning.

McDuffie, who is entering the final season of his rookie contract, is expected to sign a long-term extension with the Rams, according to Schefter.

Shortly after the news broke, former NFL quarterback Brock Huard gave his reaction on Seattle Sports’ Brock and Salk.

“This feels like a direct move to match up with JSN and the Seahawks,” Huard said.

Widely considered to be the two best teams in the NFL this past season, the Seahawks and Rams squared off in three epic battles, capped by Seattle’s 31-27 win over Los Angeles in the NFC Championship.

Over those three games, the Rams’ shaky secondary struggled to contain NFL receiving leader and AP Offensive Player of the Year Jaxon Smith-Njigba. The Seahawks star wideout totaled 27 catches for 354 yards and two touchdowns across those three matchups, including 10 catches for 153 yards and a TD in the NFC title game.

Smith-Njigba also had a career-high 180 receiving yards and two touchdowns in an overtime loss to the Rams in 2024.

“It’s kind of like an old NBA world,” Huard said. “Like, alright, we know we’re gonna have to deal with Jordan or we’re gonna have to deal with Pippen or we’re gonna have to deal with Bird. Like, how do we match up? And (the Rams) know that that was the one area – in their back seven – that could not match up.”

Listen to the full Brock and Salk conversation at this link or in the audio player in the middle of this story. Tune into Brock and Salk weekdays from 6-10 a.m. or find the podcast on the Seattle Sports app.

Seattle Seahawks offseason coverage

• What Brock Huard makes of Seahawks’ Ken Walker situation
• A possible replacement if Seahawks don’t re-sign Walker
• Huard: Jobe is most likely free agent the Seattle Seahawks re-sign
• Report: Seattle Seahawks not tendering restricted FA Jake Bobo
• The Seattle Seahawks’ risks with Walker set to be free agent

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