What is reasonable rate for lifeguard a private pool party of 23 teenagers?

1 dolar for each teenager

This is like baby sitting and you can charge them for each kid from $6 to $8 per hours.

are you qualified as a lifeguard? (as in are you employed with a pool) if so, then i would say for that many teenagers by yourself, about 15-20 an hour. :)

I would have to charge at least $25 dollars an hour!

I don't know, but I felt compelled to at least wish you good luck, because if I had to deal/be around a group of young teens/pre-teens and under, I'd go insane...let alone have to supervise them so they don't die. So good luck. I'm sure someone will give you a quote.

Are you qualified to be a lifeguard? How many hours will you be working? I have never heard of hiring a lifeguard before, but probably $25-50 per hour.

1 million bagillion pesos

That kind of stress is worth at lest $100 an hour.