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An explanation is proving elusive thus far, and authorities don't have much info to go on in response to calls from "dozens of people" in the San Fernando Valley complaining of "a rotten egg-like odor" in the air Monday morning, according to the Daily News.
While the smell has been noticed as far west as Simi Valley, and east into the Inland Empire, Los Angeles Fire Department spokesman Brian Humphrey told the paper the calls, which began early this morning, have mostly come from the north Valley and the Foothill area.
"The LAFD has not identified any source, nor has any specific hazard been associated with this "rotten egg" smell," explains a Department news release. Alas, that means there's nowhere for authorities to go to check things out.
Humphrey said those calling in to report the stink were being told to contact the South Coast Air Quality Management District, which is also a dead end today: "A voicemail at the district office said it's closed on Mondays."
But if you smelled it, take comfort: You aren't alone.
fox is reporting a bad smell in the valley that might be coming from the inland empire. too many jokes.
— stacie z (@stacie55) September 10, 2012
What the hell is that rotten egg smell out here in the San Fernando valley?
— Bear (@DeviousBear) September 10, 2012
Bit of a rotten-egg smell outside. @LAFD says it's widespread in the Valley. I'll assume there was a big parade of early-'80s cars earlier.
— Jim Ellwanger (@trainman74) September 10, 2012
What's up with this "sulfur like" smell across the valley? Can't turn on the AC in my truck without getting blasted by rotten eggs!!
— ValleyFireScan (@ValleyFireScan) September 10, 2012
UPDATE 11:25 AM: From the most current LAFD news release:
LAFD has been in direct contact with Air Quality Management District (AQMD) executive staff, who are aware of the odor and investigating. LAFD is not aware of any specific hazard associated with the odor. There is no need to call 9-1-1 to report this widespread odor. LAFD will relay any official information from AQMD as soon as it becomes available.
1:40 PM: The AQMD has weighed in on the stench, but we aren't anywhere closer to knowing what is causing the foul odor:
Field inspectors with the South Coast Air Quality Management District are in the field today investigating possible causes of widespread sulfur odors. Since around midnight last night, AQMD has received more than 100 calls reporting a strong, foul rotten egg/sulfur odor. Residents have complained from a very wide area including the Inland Empire and much of the Los Angeles Basin.
Fish kills, algae blooms and other biologic conditions in lakes can cause strong odors. Industrial facilities such as wastewater plants also can cause sulfur odors. At this time AQMD hasn't confirmed any source as the cause of the widespread odor.
AQMD will issue updated information later in the day if more information is available.