Santee park rules and regulations doesn't mention that you cannot release balloons in large quantities, doing so will probably be fine and you shouldn't have any issues
Balloons are allowed at the park. However, it IS illegal to release them. It's considered pollution, and rightly so... here is a link to the California state law regarding balloons https://balloonsblow.org/laws-concerning-balloons/
As far as its known theres never been a problem
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