With interior plumbing:
[] 1 general system
[] 2 well or spring
[] 3 other form
With exterior plumbing:
[] 4 general system
[] 5 well or spring
[] 6 other form

1 - General system - when the dwelling is served with water piped from a general supply system, with indoor plumbing to one or more rooms;
2 - Well or spring - when the dwelling is served with piped water connected to a well or spring, with indoor plumbing to one or more rooms;
3 - Other form - when the dwelling has indoor plumbing but the reservoir (or tank) is supplied from rain water or by truck, etc.;

4 - General system - when the dwelling is served with water taken from a general system piped to the premises without there being indoor plumbing in the dwelling;
5 - Well or spring - when the dwelling is served with water from its own well or spring without indoor plumbing; or
6 - Other form - when the water used in the dwelling is obtained from a public font, well, spout, etc. located off the premises without there being indoor plumbing.