I am from Kolhapur and using CNG Wagon R at Pune. There is no CNG in Satara or Kolhapur after Pune. At Warana Nagar one company from Hyderabad, they are manufacturing Bio-CNG from sugar factory bio-waste and supplying it to nearby industries. When I contacted them about CNG for my Wagon R, they told yet they do not provide CNG for vehicals, however they are in process to open a Bio-CNG pump on NH4 (now AH47) before Kolhapur city and nearby "Kini Toll Plaza" (Near Kini Wathar) in next 3-4 months, so hope they will start it ASAP
and we will enjoy the CNG ride till Goa..!!!