Smart Balloon Handling Practices from the Balloon Council:
Keep balloons secured to a weight
All helium-filled balloons should be tied securely to a weight that will keep them from releasing into the air. Be sure to individually tie each balloon to the weight, so if they become detached from the weight, they will be individual rather than “clustered” (tied together) balloons which can more easily become entangled in power lines.
Do not release foil balloons into the air
Although it is very rare, problems can occur if they become tangled in power lines and they can turn into roadside litter if not disposed of properly.
Keep deflated or popped latex balloons away from children to avoid risks of choking
Children can choke or suffocate on uninflated or broken balloons; adults should always supervise young children—especially those under eight years old—with balloons.
Be aware of the possibility of latex allergies
Latex balloons are made of natural rubber latex and are biodegradable, but may cause allergic reactions in people who are allergic to natural rubber latex.