Bio 911 is your trusted, local source for water, mold, and biohazard cleanup services throughout the San Francisco Bay Area. We are an IICRC-Certified firm that is ready to help you recover from water and storm damage, mold contamination, hoarding and crime scenes, and more. Our state and OSHA-certified staff use only the safest, EPA-compliant products to help clean and sanitize your living environment. We proudly offer 24/7 live calls as well as expedited response times for emergency situations. We also offer additional cleaning and support services designed to give you peace of mind throughout the recovery process. Since 2018, Bio 911 has helped homeowners and businesses remove and recover from harmful substances of all kinds. We are more than ready to help you. Fill out the form on this page or call us today to get a FREE, on-site estimate.
"vital information regarding source of problem was not provided in a timely manner resulting in additional expenses"
Nancy o on February 2025
Bio 911 is your trusted, local source for water, mold, and biohazard cleanup services throughout the San Francisco Bay Area. We are an IICRC-Certified firm that is ready to help you recover from water and storm damage, mold contamination, hoarding and crime scenes, and more. Our state and OSHA-certified staff use only the safest, EPA-compliant products to help clean and sanitize your living environment. We proudly offer 24/7 live calls as well as expedited response times for emergency situations. We also offer additional cleaning and support services designed to give you peace of mind throughout the recovery process. Since 2018, Bio 911 has helped homeowners and businesses remove and recover from harmful substances of all kinds. We are more than ready to help you. Fill out the form on this page or call us today to get a FREE, on-site estimate.
"vital information regarding source of problem was not provided in a timely manner resulting in additional expenses"
Nancy o on February 2025
Restoration Pros specializes in residential water damage restoration and mold mitigation from bathroom leaks, mold in garage, bedroom and kitchen. We are owner operated, servicing the entire Bay Area. Our goal is dry your property quickly killing and removing any mold damage and get your property back to pre-loss condition so you can get back to doing what you do, uninterrupted. Our team of professionals always move promptly. When it comes to water leaks, more time equals more damage. For these reasons we always move swiftly to stop the damage from spreading.
"Tech did a great job Very thorough & hard working employee"
Elberta M on May 2025
Restoration Pros specializes in residential water damage restoration and mold mitigation from bathroom leaks, mold in garage, bedroom and kitchen. We are owner operated, servicing the entire Bay Area. Our goal is dry your property quickly killing and removing any mold damage and get your property back to pre-loss condition so you can get back to doing what you do, uninterrupted. Our team of professionals always move promptly. When it comes to water leaks, more time equals more damage. For these reasons we always move swiftly to stop the damage from spreading.
"Tech did a great job Very thorough & hard working employee"
Elberta M on May 2025
SERVPRO of San Leandro is a trusted leader in the restoration industry, and our highly trained technicians provide 24-hour emergency service. We’re dedicated to responding faster to any size disaster with the training, equipment, and experience to respond to your restoration or cleaning needs.
SERVPRO of San Leandro is a trusted leader in the restoration industry, and our highly trained technicians provide 24-hour emergency service. We’re dedicated to responding faster to any size disaster with the training, equipment, and experience to respond to your restoration or cleaning needs.
Welsh Demolition Inc. is a full service demolition and asbestos removal contractor. We are a family owned business and have been in business since 2012.
Welsh Demolition Inc. is a full service demolition and asbestos removal contractor. We are a family owned business and have been in business since 2012.
Professional Air Duct & Dryer vent Cleaning & Repair Company in San Bruno.
Professional Air Duct & Dryer vent Cleaning & Repair Company in San Bruno.
Global Plasma Solutions is a manufacturing company that sells air purification systems primarily into the commercial and residential markets. Home owners can benenfit from our systems as they are easily adapted to any HVAC system. Go to www.gpshvac.com to find a certified contractor near you to have one installed within your home.
Global Plasma Solutions is a manufacturing company that sells air purification systems primarily into the commercial and residential markets. Home owners can benenfit from our systems as they are easily adapted to any HVAC system. Go to www.gpshvac.com to find a certified contractor near you to have one installed within your home.
Professional Air Duct & Dryer vent Cleaning & Repair Company in Dublin.
Professional Air Duct & Dryer vent Cleaning & Repair Company in Dublin.
Professional Air Duct & Dryer vent Cleaning & Repair Company in San Ramon.
Professional Air Duct & Dryer vent Cleaning & Repair Company in San Ramon.
roofing paving of all types remodeling an renovation over 27 years experience good work at a good price
roofing paving of all types remodeling an renovation over 27 years experience good work at a good price
Professional Air Duct & Dryer vent Cleaning & Repair Company in Walnut Creek.
Professional Air Duct & Dryer vent Cleaning & Repair Company in Walnut Creek.
Radon is the second leading cause of lung cancer in the U.S. The gas seeps through cracks in foundations and collects in basements and other low areas. Once you breathe it in, radioactive particles lodge in lung tissue and do long-term damage. Because you can’t see or smell radon, the EPA recommends testing your home every two years—and after major renovations—to keep your family safe.
Yes—every home should be tested. The EPA advises doing it at least every two years and any time you remodel, buy, or sell. On average, one in 15 houses nationwide sits above the recommended limit, and the only way to know where yours stands is a formal test. The equipment simply measures gas levels and won’t change your indoor environment, so the process is completely harmless.
Certified radon professionals—often home inspectors or dedicated radon mitigation contractors—handle testing. These radon testing professionals follow EPA protocols and use calibrated instruments to check levels throughout your house. Hiring a certified radon specialist means results you can trust for real estate deals, insurance requirements, and, most importantly, your family’s health.
Inspectors specialize in measuring radon gas levels, while licensed mitigation contractors design and install the systems that remove it. If your test comes back high, your inspector can point you to a qualified mitigation pro who will size and install the right fan, piping, or other equipment to bring levels down.
No—standard home air purifiers don’t touch radon. They’re built to trap dust and pollen, not radioactive gas. If testing shows high levels, you’ll need a dedicated mitigation system that vents the gas from beneath your home to the outdoors. Relying on a room purifier alone won’t keep your indoor air safe.
Opening a few windows in your home might dilute radon for a short time, but the gas seeps back in as soon as they’re closed. For a lasting fix, you’ll need a professional mitigation system—often a sub-slab depressurization fan—that pulls radon from beneath the foundation and safely vents it outside.