Will wells located near animal pens be more likely to show fecal contamination than wells that are not near animal pens?

Science Fair Project Information
Subject: Environmental Sciences
Grade level: High School - Grades 10-12
Academic Level: Advanced
Project Type: Experimental
Cost: Medium
Awards: None
Affiliation: Batesburg-Leesville High School (BLHS)
Year: 1997
Description: This experiment involved two different testing methods that had completely different procedures. The first test: five 100ml samples of water were taken about two hours before they were taken for testing. A packet of Colilert was added to every 100ml sample and then the samples were incubated for 24 hours at 35 degrees Celsius. The next day the samples were taken out of incubation and examined. The second test was done by coating the bottom of a petri dish with a lactose broth. Then, a thin layer of water was poured over the broth. Any excess water was poured out and the dishes were incubated at 44.5 degrees Celsius for 24 hours. The next day the samples were removed and examined with a dissection microscope (spectroscope).
Link: http://scssi.scetv.org/mims/schools/blhs/science/molly1.htm