Plans for CIS-2018.

What do you mean, not entirely clean, and there's also an unpleasant smell? :)

I mean, where exactly? Is it dirty in the city streets, or on the beach, or is the water in the sea dirty? Or maybe the person didn't check their own pants?
I'm just talking about a specific life hack in Anapa that has been known for a long time (learned from a diver I happened to talk to). And it's a very effective life hack. There are two beaches there, and you need to go depending on the wind direction - so that it doesn't blow towards the shore.
The difference is huge. If you follow this rule, you'll end up in clean water. You can see the bottom, I don't know, I didn't swim to the end of that zone, dolphins were already nearby. But if you come when the wind is in your face, you can't see the bottom near the shore. It's the same beach.