The Big pipe just sticking up out of the ground

When we drive out to Little chief there this 8 foot round pipe standing about 20 feet up in the air with rural water written on it. If you look off in the distance you can see another pipe.
The house we been working on at Little chief has a water meter and not a well. The house is miles away from the closes house. Why?? Will it seem when they get oil here in OK they also get salt water and natural gas. Many year back they would just pump the salt water back into the ground or put it on the ground. The salt water they pump into the ground mix with all the under ground water. The area well became undrinkable. Look like the oil company were take to court and had to get water to all the people with bad water. Most country home I guess in this area have meters for water. When you go pass a big pipe standing up in the air around pawaka OK you now know why. The salt water from the oil well are haul away.