the RDA of sodium is fewer than 2400 mg a day. (that's technically the equivelent of 1 tsp of salt a day - but there's a ton of sodium in processed foods, in canned foods, in restaurants, etc) - it's really tough to stay under that limit.
if you are hypertensive (high blood pressure) then the number should drop to below 1500 mg a day
If you up youor intake of water, it shoud help to flush the sodium out of you -