I have a new Spanish person from Cali, Colombia. She was explaining to me the ‘stratification’ system in Colombia. I have mentioned this before, but, she clarified a few things and I think it’s so interesting, I decided to post about it again.
It turns out that 100% of Colombia, not just the cities, is divided into zones (strati) which strictly defined boundaries and financial / quality of services consequences. A similar system is used in Brazil and Chile but not, based on a quick query, anywhere else. Many if not all cities have some notion of defined sub-areas that affect taxes and such, but nowhere (that I could find) takes it to the level of Latin America.
Here is a map of Bogotá:

Strata 0 (which I guess is the same as “no strata”) implies: little to zero services. People are often living illegally in informal housing, and earn and pay virtually nothing. However, it is possible for a rich person to build an estate in “strata 0”. He wouldn’t pay either, but, he would have to figure out his own services.
Strata 2 = generally urban. Poor services (water, sewer, electric, gas), heavily subsidized by the state. Providers are generally private and receive government money to lower their rates by specified amounts depending on the strata. Generally lots of crime and insecurity. Think: DTES.
Strata 3 = where my new friend lives; generally more or less safe, average prices and reasonable service quality. Think: East Vancouver. Strata 4: Point Grey. Strata 6 = Elon Musk.
The interesting thing is that strata are formally defined on maps and one can, in many cases, change strata (and thus increase cost, along with service quality) by crossing the street.
Does this seem like a good idea? To be honest, if Colombia and Brazil is doing it: probably not! It would seem more proper to provide a uniform level of service, with subsidies as required based on income. But I guess it is somewhat simpler to manage it all by street address.


