The coastal state of Maharashtra has three major rivers and several lakes, making it one of the few states in India having a vast water bank. However, most of its water bodies, including the Godavari, Krishna and Tapti rivers, are so polluted that they look like nullahs or drains. Heard about the Jayanthi and Gomati nullahs of Kolhapur? Well, according to water conservationist Rajendra Singh, they were once a water source but today we call them nullahs.