article_snippet.sent: Local officials say Local officials have now launched an investigation into how the water from the well, which cost £1,000 to build, became so polluted .
article_snippet.sent: Local officials do not yet know exactly what substance is in the first fresh water, though Local officials say Local officials are conducting a specific investigation to discover the cause .
article_snippet.sent: Local government officials in Ansai say Local government officials in Ansai have already started a specific investigation.