Press Release

Press Release Fire Marshal Warns Residents about Handling of Pool Chemicals

Fire Marshal Warns Residents about Handling of Pool Chemicals
For immediate release:
  • Department of Fire Services
  • Sharon Fire Department
  • Massachusetts Department of Environmental Protection

Media Contact for Fire Marshal Warns Residents about Handling of Pool Chemicals

Jennifer Mieth, Public Information Officer

home pool chemicals

StowSummer weather finally arrived this week and many homeowners are getting their pools ready. State Fire Marshal Peter J. Ostroskey wants pool owners to take a moment to make a pool chemical safety plan and share it with family members. State Fire Marshal Ostroskey said, “Pool chemicals may become a hazard when they get damp or wet with a small quantity of water or when they are improperly mixed with each other, other chemicals or reactive materials.” He added, “It is important to keep pool chemicals dry. Store them in separate containers with lids in a locked shed away from the house and pool.”

 Ostroskey said, “Local fire departments and hazardous materials teams often respond to emergencies involving swimming pool and hot tub/whirlpool chemicals. The potential costs incurred by the pool owner for emergency measures can be extremely expensive. Take the necessary measures to prevent or address any injury to people or harm to the environment.” 

The State Hazardous Materials team was called to a home in Sharon recently. Pool chemicals were being mixed inside and when they got wet, began to create dangerous chlorine vapors. Two people were taken to the hospital after breathing in the chlorine gas

Every year more than 5,000 people nationwide are sent to the hospital with pool chemical related injuries.

 Residents should take care and follow these safety tips:

  • Read and follow the manufacturer’s instructions very carefully. Make sure when you dispose of chemicals that you follow the directions provided.
  • Children should never handle pool chemicals, and even teenagers should not be allowed to do so without constant adult supervision.
  • Put a lid on chemical containers every time. When containers are left open, water can get in and react with the chemicals. Remember: powder in the water, not water in the powder.
  • Clean tools and equipment used to handle one chemical properly before using them with a different chemical.
  • Spilled substances (e.g., from damaged containers or from sloppy handling) must be cleaned up and disposed of properly to avoid creating an inadvertent mixing or chemical reaction.

Liquid chemicals, such as sodium hypochlorite (bleach), if spilled, can leak into other containers or seep into cracks in the floor. Liquids, because of their properties, can create hazards not associated with solid or granular products and must be carefully handled.
Mixing chemicals can lead to a chemical reaction that may generate temperatures high enough to ignite nearby combustible materials. Mixing can also lead to the release of highly toxic and corrosive chlorine gas. Ostroskey said, “A few years ago, a man mixing pool chemicals in his attached garage created a chlorine gas cloud in his family’s home that took firefighters several hours to dissipate.”
Proper pool chemical storage is important. Pool owners should conduct a review of how they store their pool chemicals and especially look for and correct situations where chemicals could be intentionally or accidentally mixed. Make sure to:

  • Separate incompatible substances; avoid storing containers of liquids above containers of other incompatible substances. The most common pool chemicals are inherently incompatible with each other, so be sure to keep them apart.
  • Avoid mixing old chemicals with fresh chemicals, even if they are the same type.
  • Use separate, designated scoops for each chemical. Handle only one chemical at a time and make sure that tools used with one substance are not used with another unless all residues are removed.
  • Use separate, designated containers for cleanup of spilled materials to avoid inadvertent mixing of spilled substances. Consult your local hazardous waste disposal facility for more detailed information on proper waste disposal.
  • Store pool chemicals outside the home or attached garage; a locked stand alone shed is recommended.
  • Lock your storage area to keep children, pets and unauthorized users out.
  • Keep your storage area free of rags, trash, debris, or other materials that could clutter the hazardous material area. Keep combustible and flammable substance away from the area.

Proper Chemical Disposal
Also, do not dispose of old pool chemicals in the trash or down the drain. Take old chemicals to a household hazardous waste collection day in your community or to a commercial hazardous waste facility. Since sodium hypochlorite (bleach) is the same chemical used in most water treatment facilities, check to see if your local plant will accept the chemical.
For more information about how to store and use pool chemicals safely, turn to: the MassDEP web site ( or the U.S. Environmental Protection Agency ( Pool chemical manufacturers’ websites would also be helpful.


Media Contact for Fire Marshal Warns Residents about Handling of Pool Chemicals

Department of Fire Services 

The Department of Fire Services provides training for firefighters, fire prevention, fire code enforcement, education to the general public, and oversees fire investigations through the Office of the State Fire Marshal. We support the fire service in the protection of life and property, promote and enhance firefighter safety, and provide fire service leadership through policy and legislation.

Sharon Fire Department

Massachusetts Department of Environmental Protection 

MassDEP is responsible for ensuring clean air and water, safe management and recycling of solid and hazardous wastes, timely cleanup of hazardous waste sites and spills, and the preservation of wetlands and coastal resources.


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