There are two wells at Consolidated Water's plant on Ambergris Caye, and both are at a depth of 45'. It should be noted that they are NOT fresh water wells, but rather seawater.
Here is a quote from the Consolidated Water website:
"The raw seawater for the plant is obtained from wells located on site, avoiding the need for expensive pre-treatment equipment and chemicals associated with open sea intakes. Reject water from the plant is disposed of via deep wells, also located on site. The plant utilizes diesel engines to drive the main high pressure pumps and hydraulic turbochargers to recover energy from the high pressure brine stream.
Consolidated Water is also responsible for chlorine disinfection of the final product and reservoir storage."
(Source:
www.cwco.com/html/AmbergrisCaya.html)