villagers in ansai , china , spent £ 1,000 and hours of hard labour digging a new well , the least they expected was some fresh drinking water .
but they were left disappointed after pumping the liquid to the surface , only to discover it was so polluted that they could set it on fire .
residents of ansai , in shaanxi province , central china , dug a 46m well in order to get fresh drinking water , but when the pumped it to the surface the found it was so polluted it could be set on fire .