The number of hours that a person on probation can be ordered to complete in Pennsylvania can vary, it will depend on the nature of the offense, the circumstances of the case. The judge will be the one who decides how many hours, in most instances, a person on probation would complete. Again, depending on nature of the case, it could be 10 hours, 25 hours, it could be as many as 100 hours.
There's no, say, hard rule as the number of hours that a judge can impose on a person on probation. That being said, if it's something so altogether unreasonable that the matter would have to be challenged further, it certainly could but that would be a rare instance. There would be some instances where the District Attorney's office would have input, if not many, some cases, for example, DUI cases, depending on the county involved, there's a certain standard number of hours that would be expected of the person being supervised both by the District Attorney's office and say the court, the judge that is.
Overall, it can vary, it will be based on a number of factors including the offense, and then efforts on the defendant's behalf at the time of sentencing, for example. Having an experienced Pennsylvania Criminal Defense Attorney will help you best understand your obligations with respect to community service and if you have any issues or concerns they should be involved as early as possible.