Beautiful picture. What you don’t see are the lines of raw sewerage that typically run into any body of nearby water.
I’ve been down there enough times to see the filth and squalor that goes on behind the curtain. No more, and no more of my tourist money.
I know that place rather well. The river runs pretty clean. The time you have to worry is when it turns from dry season (winter) to rainy season (summer). When the first heavy rains come it gets dirty for a bit then cleans up. The rest of the Summer it's very clean.