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313 N. Figueroa Street, Room 806  |  Los Angeles, CA 90012  |  (213) 240-8144  |

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For Immediate Release:

October 09, 2021

Public Health Air Monitoring of Foul Odors in City of Carson Show Very Low Levels of Hydrogen Sulfide

CARSON - The Los Angeles County Department of Public Health (Public Health) and Public Works are investigating odors reported in the City of Carson. The South Coast Air Quality Management District (SCAQMD) notified Public Health of an odor event in Carson late Thursday afternoon and advised that their investigation ruled out a point source or permitted business as the source of the odor.

Public Health conducted air monitoring over the last two days and found very low levels of hydrogen sulfide in the air (0.4-0.9 ppm) east of the Dominguez Channel. At these low levels, hydrogen sulfide does not have long-term health effects, but does cause nuisance odors that may cause short-term symptoms and impact quality of life. Some residents may experience temporary symptoms such as headaches, nausea, or eye, nose, and throat irritation. Symptoms should go away when the odors are no longer present.

If residents are experiencing persistent symptoms from the odors, they are encouraged to contact their health care providers, especially if they have any chronic health conditions. Residents should also ensure that they have adequate supplies of their medications, especially if they have heart or lung conditions.

Local officials are continuing to work to identify the source of the odor, however until the odor event subsides, Public Health recommends preventing outdoor odors from entering the home by keeping doors and windows closed as much as possible while odors are present. Public Health also recommends using an air conditioner, if available. Residents can also use a portable indoor air filter such as a High Efficiency Particulate Air (HEPA) cleaner to improve air quality in their home. For more information on certified air filters, visit

In addition, residents should continue to call AQMD to report odors. 1-800-CUT-SMOG (1-800-288-7644).

For advice on protective measures to prevent odors from entering the home, please leave a message on the Public Health Community line 1-626-430-9821, which will be checked every hour between 7am to 10pm.