We are the mfg. of sonic ...

We are the mfg. of sonic water level meters for long term monitoring and recharge rates. We have many municipalities in the US that use our Well Watch units on monitoring wells and boreholes so they can estimate the amount of water in the region. I do not know what methods they use to evaluate it but I know they do it using our devices. http://www.enoscientific.com/well-watch-670.htm