A slum household is defined as a group of individuals living under the same roof lacking one or more of the following conditions: access to improved water, access to improved sanitation, sufficient living area, durability of housing, and security of tenure.

"Security of tenure" is probably where China's hukou system messes things up.

There's also a "complementary" category of "inadequate housing", which is defined by households spending 30% or more of their income on housing. This isn't part of the definition of slums, which is probably why the US and such appear so low. But keep also in mind that 0-10% can still mean up to 1 in 10 households.

The data sources are a mixture of national statistical agencies and the UN's own.

[–] invalidusernamelol@hexbear.net 6 points 1 month ago* (last edited 1 month ago)

security of tenure.

Like 90% of American rentals allow the landlord to evict you whenever for basically any reason.