What kind of pollutants? Trash was the first one we thought of, but other pollutants matter too. Like: oil or gravel that might wash off roads, pet waste (like dog poop), road salt, and even leaves and grass. Some of those things like dog poop, leaves, and grass might not matter if there was just a tiny amount, but when it rains, the stormwater can carry that stuff all to one place: like Lake Phalen where the nitrogen and phosphorus in those things can make algae grow, make lakes green, and make it unhealthy by reducing the oxygen that fish and other water life need to live. That's why every bit matters, because our land is all connected to our water...
Sage brought us outside to practice testing the quality of the water. Here's some of the pictures below. Thanks Sage!
|Testing for Dissolved Oxygen|