Here’s where the fun sneaks in: touch the water (if it’s not obviously gross). Dip a stick or your fingers into the edge. Clean water feels soft and cool.
If it feels slimy or sticky? That’s often a sign of excessive algae or dissolved chemicals. Not the kind of slime you want in a science project.
Is the water temperature way warmer than the air? Hot water runoff from factories or pavement can be a pollutant too—fish hate hot baths.
The Living Lab Test
Now for the most inspiring part: look for life. Clean water is a bustling neighborhood of critters. Duck under a rock and see if there are insects like mayfly nymphs, caddisflies, or stoneflies.
These little guys are super picky about water quality. If you spot them, you’ve found a clean water goldmine. If you only see leeches or mosquito larvae, the water is likely polluted.
3d Flat icon as Pollution and Clean River concept as A view showing a
And if there are zero bugs? That’s like a ghost town—usually a bad sign. You can even make a “bug chart” with your friends for a real citizen science project.
