For football fields, the general guidelines is to provide a 2.5 % slope from the crown in the center of the field to and past the sideline areas of the field. It is important to install a permitter drainage system on the sideline areas of the field to remove the excess moisture from these areas of the field. You may lower the crown of the field to 1.0 % slope from sideline to crown, but then an underground drainage system under the whole field will be required. Note, many high school football and city park fields are also being used for soccer following the football season. If this is the case, then the slope for the field needs to extend well beyond the normal sideline area of the football field. If this is not done, then the sideline areas of the football field were the players stand during games becomes torn up and this will make a very poor playing surface for the soccer games. For soccer fields built out of native soils, the recommendation is to provide a 1.0 to 2.5 % slope to the crown. While a 1.0 % slope to the crown is preferred by most soccer players, they also don't like playing in a swamp. If an underground drainage system cannot be included in the design of the soccer field then it would be best to use a 2% crown for the soccer field to insure good surface drainage, but a perimeter drain system is required along the edges of the field. While a crown in the center of football and/or soccer field is the most effective method to provide for surface drainage, it should be recognized that for some fields, surface drainage can be provided for by sloping the entire field from sideline to sideline or from end zone to end zone. However, the further the surface water has to flow to get off the field, the less effective the surface drainage becomes. Any low areas in the grade will disrupt the flow of surface water from the field and a drainage system is all but required.