Here in the mountains an aquifer works as a hydraulic effect, as the mountains just a half mile behind and infront of my house have a water table. That water table is fairly high up there on the mountain, lots of snow, the water never has enough time to ever equalize down to the valleys thru its under ground path ways. Water is lazy and always follows a path of least resistance. In the spring time its coming right out of the shear rock faces like rivers, there's a lot of water pressure pushing that water. And that just at the surface, what you can see, thats maybe 2% of the water table.
So, even though my house sits right on a very large pristine river, and my well is 50 feet from the embankment, an only 60 feet deep, I never get any water from the river. I get water that is actually in a sense under a hydraulic effect and it also is inbetween a couple of clay layers that are natural to the mountain aquifers. Even the houses that are right on the largest lake in Idaho with wells 50 to 100 feet from the lake do not get any water from the lake. The aquifer effect is that strong.
Same reason you can find water a few hundred feet down in the desert. It follows its under ground pathways, and normally clay plays a large role in that.
Chris142's Water table most likely is an aquifer that is supplied from the surrounding mountains like Big Bear, ect There is a lot of higher ground near where he lives that receives a lot of snow pack.
Area's that have water tables available for well tapping like up state New York without large mountains do not have quite the same quality of water as places like my house. I have just about crystal clear mountain spring water all year long. 60 Gal per min. Never runs dry. I pretty much refuse to drink any water except water from my home. I pretty much only drink Water!
Wells do not get any water from the surface water table. water does not penetrate down far enough into the earth at you home, it just does not happen. Your well water would be so contaminated you would not want to drink it! Think about your septic tank and leach field?