First off, Greetings everyone! I realize this is a pretty broad question, considering these numbers will vary with temperature, pressure and etc. But I was hoping someone could me a average number just so I can get a good idea. I'm trying to find out the amounts of dissolved gases are in Water (Both salt and fresh). For example the usual amount of dissolved oxygen is 5-7ppm. I know that the ocean contains CO2, Nitrogen and many other gases from the atmosphere. Does any one have average number for these gases? Like I said, just trying to get an idea here Cheers!