![]() 0015 ppm outdoors at Carquinez Middle.ĬCH will release updated air quality data as it becomes available. ![]() 0031 ppm outdoors at John Swett High, and. On Tuesday, HazMat measured a 1-hour average reading of. The Contra Costa County Office of Emergency Services and HazMat provided 40 indoor air filters to the John Swett Unified School District for use at John Swett High and Carquinez Middle schools. Smelling hydrogen sulfide (a rotten-egg or sewage odor) is not an indicator that concentrations in the air are high enough to pose a health risk. Levels in the air may vary based on location, weather and proximity to the plant. People experiencing serious or persistent symptoms should contact their health provider. Masking is not effective protection.ĬCH recommends anyone experiencing minor symptoms to stay indoors with windows and doors closed. 045 ppm near Port and Ceres streets, directly east of Interstate 80 from the plant.Ĭommercially available carbon air filters, also known as activated charcoal air filters, are effective at reducing levels of hydrogen sulfide indoors. 11, a Hazardous Materials team collected a one-hour average reading of. 7, prompting the health advisory from CCH. The Bay Area Air Quality Management District (BAAQMD) measured a 1-hour average reading of. ![]() ![]() ![]() The threshold at which hydrogen sulfide in the air may cause symptoms is. Contra Costa Health (CCH) continues to advise Crockett residents to take steps to protect their health due to elevated levels of hydrogen sulfide coming from the Crockett Wastewater Treatment Plant.Īir monitoring data from Monday and Tuesday from CCH’s Hazardous Materials Program (HazMat) show concentrations of the chemical that may cause symptoms such as headaches, nausea and irritated eyes in people exposed to it for long periods.ĬCH and its partners have not detected levels of hydrogen sulfide in Crockett’s air that would be considered immediately dangerous to public health. ![]()
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