Dental Facilities

Dental amalgam used in dentistry to fill cavities consist of a mixture of metals including mercury. Mercury-containing dental amalgam can find its way into the environment when fillings are placed or removed, and waste amalgam materials enter the wastewater system.  


The City of Hayward requires dental facilities to obtain a dental wastewater discharge permit. The permit requires dental facilities to install an approved amalgam separator and implement best management practices (BMPs)

How do I comply?

Dental Facilities can adhere to City's requirements with the following steps:

Exempt Facilities 

Dental offices that only perform amalgam placement or removal three days or fewer per year are exempt from requirements, as well as facilities that perform following functions:   

  • Orthodontics
  • Periodontics
  • Oral and maxillofacial surgery
  • Radiology
  • Oral Pathology or oral medicine
  • Endodontics
  • Prosthodontics

Where do I need to submit my self-certification forms?  

Self-certification forms can be submitted via email to , or via mail to 24499 Soto Road, Hayward, CA 94544. 


Call Water Pollution Source Control at 510.881.7900 or email us at