When I run my cold water, I've been getting more and more air in the water. Hot water line doesn't seem to produce as many air bubbles and I'm not sure why. We have a big house. We have the deep sink, a bath in the finished basement/inlaw, the kitchen sink, a half bath, and 2 bathrooms upstairs (each with 2 sinks and master bath has a tub and shower). I hated the idea of bleeding the pipes, but I did last night (3 showers, 1 tub, and 8 sinks, 4 toilets to flush... I didn't run dishwasher or washing machine... it's such a water waste). I started with the sinks closest to the water line and then made my way upstairs then shut off from upstairs to the downstairs. The basement sinks ran about 10/12 minutes. I tested the sinks upstairs and, when I stopped them up and ran water, I could see the sink, not clouds. I thought my problem was fixed. Today, I had a little splutter when I turned on the top floor sinks and the water is full of air bubbles again. Do I need to bleed the pipes? Will this cause a problem if I let it go? Do I have a problem and where are the likely air culprits? Will I need a professional to fix something? Thanks

Are you on well water?

No. We get city water. We have a septic tank that was cleaned right before we moved in last summer.

I'd start with calling the city and see if they can provide some help. It seems to be their problem to me. But I'm no plumber. These other guys might have some better advice.

Do you get this air from outside faucets as well?
Do you have a filter or water softener?