Slightly off topic, but when I first started dating my now Husband, and I started attending family dinners at his parents house, he informed me, on about the third trip, that the house had a septic tank. Thankfully, I hadn't needed any products in this time frame, but I would have flushed tampons. I can't imagine how upset I would have been if I caused a clog or a back up within a month of meeting these people! The kicker, though, is that he explained they don't even flush toilet paper. I guess it backed up once and now they don't take any chances, despite using a "septic safe" TP and everything. I have to say, it bothers me. I can barely go number 1 there.
Last year, their street was forced to switch to public plumbing. They still don't flush TP. I guess it's a force of habit, at this point.
My neighbors only flush bodily waste. I find it odd. The house is immaculate at all times, but if you use the bathroom there is a can of used TP!
I understand (National Geographic article) that the sewage systems in some places (Mexico City, Mexico was mentioned) the systems are both old and seriously overloaded due to explosive population growth in the last thirty or forty years. There is no way to tear up the whole system to modernize it - both due to expense and the difficulty of accessing the underground systems due to the development that followed the explosive population growth.
There were other cities mentioned - I just don't recall the names and countries of those cities as well as the Mexico City example (which is geographically constricted due to being built on an island in a lake in the caldera of an extinct volcano - so it is very interesting geographically - at least, I hope it's an extinct volcano).
But there are a lot of waste paper baskets in Houston area bathrooms that may say "wrap used feminine products & deposit here" - but due to the number of international visitors and immigrants - those waste paper baskets have a lot more toilet tissue in them than just that wrapping around feminine hygiene products.
There are also signs showing not to flush diapers, wipes, tampons, and the like in pictograph symbols/icons due to the sheer number of languages spoken in some areas. English & Spanish are only two of the seven or eight languages mentioned as being spoken in the local school systems. The local stores would run out of wall space in the cubicles if they tried to put up signs in every possible language...if they had anyone who could prepare a sign in all of them.