Outside of the compound that I was working at in New Delhi, the cab drivers would sleep on cots outside of the gates. In the AM they would strip down to their undies (towel like gear) lift a metal grate and bathe right there on the curb. Then they'd get dressed and be ready to drive.
Families drink water from the same water trough as the cows that roam free do.
the street is probably the cleanest are for them to defecate.