Multiple choice How much percent of fresh water is available for human use? 10.16% 1.00% 1.66% 5.67% Reveal answer Fill a bubble to check yourself B Correct answer Explanation While the Earth is covered in water, only about 2.5% to 3% is fresh water, and of that, only a very small fraction (often cited as around 1%) is easily accessible for human use in rivers, lakes, and accessible groundwater.