New Tool Maps California’s Biggest Greenhouse Gas Emitters

Interactive map pinpoints the polluters next door

In this Google Earth view, the height of the "balloon" location markers indicates the volume of greenhouse gas emissions.

Wondering where all the petroleum refineries are located in California? Curious about which industries in your area emit the most greenhouse gases? Or which counties have the most big industrial polluters, and which don’t have any at all?

A new interactive map from the California Air Resources Board taps the versatility of Google Earth software to transform eye-glazing spreadsheet data into a visual, if wonky, feast.

The map shows the locations and greenhouse gas emissions of about 625 facilities — the largest industrial greenhouse gas emitters in the state. The graphical tool can filter by type of facility (cement plant, refinery, electricity generation), by county or air district. You can use the satellite view to see a facility’s physical footprint, then switch over to Google Earth to see how its carbon footprint stacks up against other emitters. The EPA released a similar map earlier this year, but without all the Google Earth bells and whistles.

Say you’re in Santa Clara County. There are 17 sites that pop up on the map. Eight generate electricity. The rest are a grab bag: a sewage treatment plant, a cement factory, a few manufacturing facilities. Toggle over to Google Earth to see how they all compare to each other, and it’s easy to identify the two biggest industrial greenhouse gas emitters in the county: Calpine – Metcalf Energy Center, LLC, a power plant in San Jose that released more than a million metric tons of greenhouse gases in 2010; and Lehigh Southwest Cement Company in Cupertino, which released nearly 600,000 metric tons in 2010. But these are far from being the worst in the Bay Area. The Chevron Refinery in Richmond released 4.5 million metric tons of greenhouse gases in 2010.

The Air Board requires facilities that emit 25,000 metric tons of carbon dioxide a year — comparable to the emissions of about 5,000 cars over the same time period — to report their emissions every year. The information was already public, but as the Air Board’s Stanley Young points out, “Not everybody has a lot of fun playing with an Excel spreadsheet.”

More than 600 industrial greenhouse gas emitters are included on the map.

Some out-of-state locations are included: plants in other states that sell power inside of California (check out those big emitters in Wyoming). And there’s one category that doesn’t appear on the map: electricity traders who buy power from out-of-state, then re-sell it in-state. As Young explains it, the traders do report emissions, but there’s no one carbon-emitting spot where it would make sense to locate them on a map.

All of the companies on this map are participating in California’s cap-and-trade program. The first  auction of carbon pollution permits is scheduled for November 14.

New Tool Maps California’s Biggest Greenhouse Gas Emitters 1 February,2018Molly Samuel


Molly Samuel

Molly Samuel joined KQED as an intern in 2007, and since then has worked here as a reporter, producer, director and blogger. Before becoming KQED Science’s Multimedia Producer, she was a producer for Climate Watch. Molly has also reported for NPR, KALW and High Country News, and has produced audio stories for The Encyclopedia of Life and the Oakland Museum of California. She was a fellow with the Middlebury Fellowships in Environmental Journalism and a journalist-in-residence at the National Evolutionary Synthesis Center. Molly has a degree in Ancient Greek from Oberlin College and is a co-founder of the record label True Panther Sounds.

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