Don't know. :( I should find out because there are a lot of signs around begging protection for the Missoula Auquifer.

I'm at home and when I purchased this place, my documents (which I read front to back) said 180 feet. However, I live in the Coachella Valley and groundwater is being depleted for landscaping. I know about the depletion from reading. I believe it's an inch or two every year on average trhoughout the "valley" (I even know that technically I live in a sink, not a valley).

right here about 50 feet.
wetland all around me.

Between 100 and 300 feet down there is probably groundwater under my building. That's an educated guess as I know where old streams still come out between the cracks of the pavement, and how high they are on the slopes.

This is Southern Louisiana, if you step on the ground too hard, water sometimes will gush up.

Our well is 145 feet, but that is fairly meaningless. A few feet one way or the other and you might halve or double that. Can we call "foul" on this question? Or is calling "foul" the only right answer?

My well is approximately 210 feet. Most wells in my area are of similar depth.

Right here the water is about 50 feet down, but the drinking and other municipal water comes from Ten Mile Creek at this location. On the north end of the valley you might be required to drill more than 300 feet to reach water.

30 meters, but it is illegal.
"Water flows uphill to money."

I think about 200 feet. The city sends around its' water reports periodically in the water and sewer bills, and I think they include well stats, like the depth and how much water it pumps, etc.

Periodically the newspaper reports on a lawsuit between property owners and some developer who wants to subdivide a parcel and build hundreds of homes - we hear about it that way.

Also, friends and neighbors with wells who are experiencing water shortages due to the massive amount of growth (and water "dumb" agriculture) in the last few years, and have to get new (deeper) wells drilled.

For US groundwater information, try www.waterdata.usgs.gov

They have compiled locations of wells by latitude and longitude plus they list depth to water from ground surface.

It ranges from 72' to 222' below ground surface here in Cobb County, GA.

Not only is this severely local but it can change by season. If they no longer drill wells in your area, historical records of old well depths may yield some clues.

630' - that's how deep the well went before things
got wet...

Not so sure about where I live now, but my last house had an underground stream running below it, so during storms our cellar was under 6 feet of water, so that would make it's normal level about 10 feet below ground level.
Leamington Spa, central England, UK

As deep as you like, but you won't find any.

I asked the local real estate agent, and the prospective neighbors.

No idea. But the aquifer is pretty accessible.

Hmmm - tricky...
1. Go to a local civil-engineer and ask
2. Local farmers know the depth of the water table
3. Ask the local department of Primary Industries
4. Ask a local builder - in times of drought, buildings walls crack when the water table sinks - builders will know how deep
5. Go out into the yard and dig, dig, dig
6. The local waterboard ALWAYS monitors this stuff (on behalf of the local Department of Primary Industries) - ring and ask about artesian bores, aquifers, the type of soil you're on, and so on - they'll know

At work? I have no idea. At home? Probably over 100 feet. In Bayonne, six feet probably. Clay makes the ground wet underneath. Pick the right spot and you could tap the old Morris Canal.

In my case, this was easily answered by having the pump on our well fail, and looking at the waterline on the pipe when it was pulled to install the new pump. I do not recommend this method!