The collector gets a lot of complaints about the timing of the water supply. Tanker-timings are highly erratic. Water for the villagers is also highly dependent on the supply of electricity. Erratic electric supply affects the schedule of the tankers, as electric pumps are used to fill them. Then, tankers break down.
All drivers carry logbooks.
With the connivance of tanker owners, many of these officials are now minting money while the sun shines. A population of 5,000 requires 10 tankers a day. The corrupt contractors register more trips on paper. It's very difficult to monitor the actual number of trips made to each village if the talati has been bought over. At many places the contractors distribute water on alternative days and then charge the government for daily supply.