My child has always liked water. Even as a baby, she liked to kick in the bath and was fascinated by waterfalls. So when we just assumed that she would love the community pool. But when we took her to the pool, she was terrrified. She would watch other kids splashing and having fun but when we took her within yards of it, she screamed, clung to us, and said "NO, NO, NO!!!" There is nothing worse than your kid being terrified and knowing that it is because of something that you are exposing your child to.
Instead, we bring her to pools frequently. We bought a small wading pool for the backyard and went in it with her, gradually sinking her into the water. We showed her how to splash and dunk toys. After just one trip to her wading pool, she was saying "Pool! Pool!" and refusing to leave the pool. She cried when it was time to go inside. Then we moved her up to the community pool, exposing her to it slowly. First she sat at the edge of the wading pool area and just looked at the water and the kids playing in it until she is enticed by the idea of splashing. Then as she hung near the edge, we moved a few inches away from the edge to model that the water is safe and to encourage her to go farther. At each point of the exposure to the pool, she remained at the step until she felt entirely comfortable with it.