1. Life- If you see fish in it, or moss, weeds, plants, etc. then that's a good sign of health. <span>2. Color- If the grass is green and the water is blue, it's a good chance of good health! </span> <span>3. Natural Resources- If you see deer and other critters drink it, on many occasions, it is probably healthy. </span> <span>4. Food- If you have caught a fish from there and the fish was healthy, that's always a good sign! </span> <span>5. Infections- If you can dip a cup in the water and drink out of it without getting ill, that means it's probably healthy because a dead animal in it can easily spread disease or infection! </span> <span>6. The Surface- If you see dead fish, or oily looking liquid, that a sign that the lake is UN-healthy. </span> <span>7. Kits- A water kit is a simple way to tell if the lake is healthy or not. </span> <span>8. Oxygen- Lakes will provide oxygen and many other natural resources. That is a healthy sign. </span> <span>9. Minerals- If nature-made minerals are found in the lake, then you should be almost positive the lake is healthy. </span> <span>10. Pureness- If the water is pure, it is healthy. </span> <span>11. Motion- If the water is active, or you see waves or mainly any motion is a good sign of health too! </span>