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I have a high water table (I own a swamp, love paying taxes on that...), anyway... Set at 50%, separate meter (you need one of those, don't trust your dehumidifier) reads 47%. Runs often during spring/summer, not during winter. (Northeast) Drains into sump.. Mine last years, few recalled....easy disposal, place on curb... disappear 
Quoted from jrpinball:Unless your foundation leaks, the humidity in your basement shouldn't have anything to do with the water table. Mine is very high here as well, but the reason your basement gets damp is because the air in it is quite cool, and when warm, moist air (like now) interacts with it, moisture condenses on all the cool surfaces (including your pins). This moisture will eventually evaporate, but will raise the relative humidity in the room. As long as your basement stays cooler than the incoming air, this cycle will continue until the air is saturated with water vapor.
I used to get water dripping off my cold water pipes, but since I've been annually running the dehumidifier and keeping the room sealed from exterior air, it's remained cool and dry downstairs.
Have French drains, two sump pumps/battery backup....With heavy rains, the pressure under my basement floor is decent....I sealed everything years ago, but recently a few new cracks started, and water returned (only under extreme rain levels). Had four pumps running non-stop during 100yr floods in 2010, had water spraying out of stones in basement fireplace, and three inches everywhere else...if I lost power, would have been 6' of water..
It's an 80yr old foundation with a swamp less than 100' away, it's going to leak...(my pipes have never had condensate)
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