On a daily basis I experience a burst of air and water from my faucets, sinks, shower etc. The burst last for a couple of seconds, then the water flows normally. I have heard that having a water softner could cause this problem. I have a water softner. What can I do to determine if the softner is causing the air in the water line? What are some other possibilities if the water softner is not the cause?

I am on city water, to help you answer my question

Most water softeners have a bypass, ether built in, or plumbed up. Bypass it for a day or too. I suspect you will still have the problem and the city is supplying you with the air. Do you get it with both hot and cold water?

You can pull the bypass valve and isolate the softner to see if the problem goes away. I really don't think this is going to be your problem unless your softner backflushes every day.

On a daily basis I experience a burst of air and water from my faucets, sinks, shower etc. The burst last for a couple of seconds, then the water flows normally. I have heard that having a water softner could cause this problem. I have a water softner. What can I do to determine if the softner is causing the air in the water line? What are some other possibilities if the water softner is not the cause?

I am on city water, to help you answer my question
No, I do not get it in the hot water, just the cold. I will try your suggestion, by bypassing the softner.

Backflush? Sorry, not to up on the terminology. I know the softner cycles once a day at the same time everyday. Would that be the backflush?

Cycling is a more appropriate term, my error. Once you open your faucet does the burst of air happen immediately or a few moments later?