Arkansas is well-known for its numerous thermal springs and mineral waters. What is not so well known is that these waters are not all concentrated in resort areas like Hot Springs or Eureka Springs. There are publicly accessible roadside springhouses, many of them with excellent drinking water, here and there along the Arkansas backroads. As I sample them they'll be added to the list.
Many of these springs are untreated. Drink at your own risk.
I've rated each spring "A" through "F." Here are the guidelines I used.