Construction of ferrow cement tanks in schools

My school has a water tank constructed by one N.G.O doing its activities in our village community. This is one of the major problem i have ever heard in my school, where 3 students have been reported dead the same year due to water borne diseases. This is before we were given the chance to construction of the tank in school. Most of these reports schools in this area were shocked and no parent wanted to bring a student in this school. But now after this improvement, the population is rising up again. We even experienced good performance this year.