Piped hot and cold water, a flush toilet, and a bathtub or shower for exclusive use by household members. All facilities must be in the living quarters, but need not be in the same room. Hot water need not be available continuously. A privy or chemical toilet is not counted as a flush toilet. A bathtub or shower is counted only if it is connected to piped running water.Lacking complete plumbing for exclusive use:
- Complete plumbing facilities, but also used by another householdAll facilities preset, but with some or all of the plumbing facilities also regularly used by someone who is not a member of the household. This category also applies if the future occupants of living quarters now vacant would be expected to share the facilities.
- Some but not all plumbing facilitiesUnits with one or two but not all three of these: hot and cold piped water, flush toilet, and bathtub or shower.
- No plumbing facilities
Data on plumbing facilities have been collected since 1940. In 1970, there were separate questions on presence of hot and cold running water, a flush toilet, and a bathtub or shower. The questions were combined in 1980. In 1980 complete facilities must not only be in the building, as in 1970, but also inside the housing unit.