Have you ever seen a lawn pimple! HaHa…actually it’s just a massive build up of water under ground. It’s very common this time of year when your sprinkler system has been turned off during the winter. Sometimes there will be breaks and since they are underground you can’t see them. In a situation like this one, the root system of the grass is thick enough and the soil compacted to the point the water stays under ground. It then forms a water bed like situation in the lawn and the water builds up there. The issue ends up being you have punch a hole in the ground to let all the water out then dig around to find the break. It’s very important to find these types of breaks because it is usually a major one that is letting lots of water out. Considering how much the city charges for water you want to get it fixed! Hope this helps! Let us know if you have any questions!