I have a well in my backyard that was once hooked up to my house. When it was in use, we got all of our water from the well. We washed our clothes and dishes in water from the well. We bathed and showered in the water. We cooked with it, and we drank it.
Then one of my neighbors had a water test done on his well, and he found out that there were all sorts of chemicals in the water that could cause serious health problems over time. This is something I had not considered because I grew up in the country during a time when everyone was hooked up to well water.
Rather than trying to get my well water filtered and doing all of that chemical testing, I decided to get connected to the county water system. The county water may not be perfect, but I feel better using it instead of the well.