Air District Operations

The Air District is taking steps to ensure Bay Area air quality and public health are protected while the shelter-in-place orders are in effect. Permits for businesses adjusting operations to aid in the public health response will also be expedited. Read more... | en Español

Air Quality Advisory

Smoke from wildfires may slightly impact local air quality and cause hazy skies. There is no Spare the Air Alert in effect on Friday and air quality is not expected to be unhealthy. See our hourly air quality data for the most up-to-date information, as well as Press Releases@AirDistrict, and our Wildfire Safety Tips web page.  Sign up for Bay Area Air Alerts.  en Español

Sobre la calidad del aire

Informes especiales

El Distrito para el Control de la Calidad del Aire del Área de la Bahía elabora informes periódicamente sobre áreas que preocupan al público. Estos informes incluyen resúmenes y análisis de datos del monitoreo del aire; evaluaciones de riesgo de una instalación en particular, como parte del Programa "Focos Rojos" (Hot Spots) de contaminantes tóxicos del aire; o evaluaciones de riesgo realizadas para casos especiales.

Date of ReportReports and Associated Documentstable-mobile-only-column
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03/02/2015Lehigh Health Risk Assessment Addendum - BAAQMD Approval
03/02/2015
Reports and Associated Documents:
20/11/2014Comments on the Lehigh HRA Addendum will be accepted by the BAAQMD until the close of business on December 22, 2014


Lehigh HRA Addendum October 2014


Appendix A CEIR analytical


CEIR update Oct 29 2014


Appendix B


Appendix C – AERMOD and Appendix D – HARP are available upon request


Appendix E-1 Annual Average GLC


Appendix E-2 Maximum Hourly GLC


Raw Data


Wind Speed Data
20/11/2014
Reports and Associated Documents:
Comments on the Lehigh HRA Addendum will be accepted by the BAAQMD until the close of business on December 22, 2014


Lehigh HRA Addendum October 2014


Appendix A CEIR analytical


CEIR update Oct 29 2014


Appendix B


Appendix C – AERMOD and Appendix D – HARP are available upon request


Appendix E-1 Annual Average GLC


Appendix E-2 Maximum Hourly GLC


Raw Data


Wind Speed Data
08/09/2014Comments on the following two documents will be accepted by the BAAQMD until the close of business on October 9, 2014


Lehigh Southwest Cement Co. response to BAAQMD's HRA Comment Letter


2013 Air Quality Modeling Protocol for Lehigh Southwest Cement Co.
31/12/20132013 Health Risk Assessment for Lehigh Southwest Cement Company - This HRA was submitted to the District to demonstrate compliance with BAAQMD Regulation 9-13-303 requirements at maximum capacity. This document is currently under review by District staff. Comments will be accepted until June 1, 2014.
31/05/2013Addendum to 2011 Health Risk Assessment for Lehigh Southwest Cement Company, 2013 - This addendum provides an estimate of the Maximum production rate at which the facility can operate with reasonable assurance that the AB2588 notification levels will not be exceeded.

Contact Us


Monitoreo del Aire

415 749-4985

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Spare the Air Status
No Wood Burning
Spare the Air Status
  • Friday,
    9/18

    No Spare the Air Alert in Effect

  • Saturday,
    9/19

    Spare the Air Alert in Effect

Last Updated: 10/06/2015