Background: Outbreaks of gastroenteritis are common in India. Most of the gastric infections increase due to humid weather condition, which in turn facilitates bacterial proliferation. Gastroenteritis continues to be transmitted in environments characterized by inadequate water supply and poor sanitation. Aim: 1) To find the source of infection 2) To propose control measures. Materials and methods: On 10th February 2010, Kurugod village reported a cluster of gastroenteritis cases. A case of gastroenteritis was defined as occurrence of more than 3 loose/watery stools and vomiting. Then our team searched for cases of gastroenteritis in that village by house to house survey and inspected the sanitation and water supply system. We collected water specimens from the affected areas for laboratory investigation. Results: The outbreak started on 10th February 2010, peaked on 17th and lasted till 20th February 2010. Total 245 cases were found in that village, out of that 230 cases of were reported in Kurugod A (attack rate: 2.21/1000, no deaths). The attack rate was highest among children aged 0-5 years (5.06/1000) and females were more affected (2.59/100). Water analysis was done from 11 different places of Kurugod area, the reports confirmed that water was unfit for drinking and chlorine was totally absent in 6 water samples of Kurugod A. Conclusion and Recommendation: This outbreak was due to contaminated water supply. To prevent recurrences in the future, we recommended that tanks should be cleaned and chlorinated periodically.