Snoring in a 1 year old can be normal.
..Generally it is from enlarged adenoids
. It can also occur when there is a cold and the nasal passages are swollen. If it is super loud and he seems to have gaps in his breathing, see an ENT to check things out. If it is not that loud chances are he will outgrow it as his airway grows. It is also worth mentioning at your next doctor visit.