SAN FRANCISCO—Thirty individual reports of a foul odor was reported by individuals in the city of San Francisco on Wednesday, December 28. The odor was described as a rotten egg or sulfur-like scent that dissipated at approximately 7:00 a.m. Though the odor is no longer present, its origin has yet to be confirmed.

Pacific Gas and Electric Co. (PG&E) and the San Francisco Fire Department (SFFD) first began receiving phone calls of the strange odor near 2:00 a.m. according to J.D. Guidi, a spokesperson for PG&E. Jonathan Baxter, a spokesperson for the SFFD stated that the neighborhoods spanning from the San Francisco coastline such as Marina and Bayview to South of Market, and outer regions such as Richmond, were regions where residents reported issues of the odor. Guidi stated that no customers reportedly loss gas services in the midst of the foul odor.

“This does not appear to be related to PG&E facilities,” said Guidi to the SF Chronicle.

“Currently the odor has dissipated with NO cause or origin Determined. No threat to Health or Safety,” tweeted the SFPD on Wednesday.

The SFFD is continuing to investigate the official cause of the smell reported with the help of other city agencies, while PG&E is monitoring the air.