Imerys Filtration Minerals, Inc. – Santa Barbara County Air Pollution Control District

Imerys Filtration Minerals, Inc.

Imerys Filtration Minerals ‘s facility is located approximately one mile south of Lompoc and includes diatomaceous earth mining and processing facilities. Diatomaceous earth is a sedimentary deposit composed of fossilized diatoms which had silicaceous skeletons. Imerys mines, mills, and processes diatomite into powders of various grades for use by industries in many applications. Imerys also operates a separate Celpure Plant within the Lompoc facility to produce specialized product and develop new products.

Operating Permits

Imerys Filtration Minerals, Inc. Title V Operating Permit – Renewal Date of June 12, 2025

Draft Permits

The draft permit renewal was issued on March 28, 2024. Comments are due by April 29, 2024. See: Draft Federal Part 70 Permit.

Public Notices

There current public notices for the draft permit: Public Notice.

Santa Barbara County Air Pollution Control District will be closed December 25 through January 1, reopening on January 2, 2026.

If you experience an air quality emergency during this time, dial 9-1-1 to reach first responders. For non-urgent matters, you can send a message via our website: https://www.ourair.org/contact-us/. We look forward to working with you in the new year. Happy Holidays!

El Distrito de Control de la Contaminación del Aire del Condado de Santa Bárbara estará cerrado del 25 de diciembre hasta el 1 de enero y reabrirá el 2 de enero del 2026. Si tiene una emergencia de calidad del aire durante este tiempo, marque al 9-1-1 para comunicarse con los primeros auxilios. Para asuntos que no sean urgentes, puede enviar un mensaje a través de nuestra página de internet: https://www.ourair.org/contacto/?lang=es. Esperamos trabajar con usted en el nuevo año. ¡Felices Fiestas!