Often, larger producers of maple syrup blend the products of thousands of farms through the course of a season for convenience and market uniformity. This can destroy the unique character of a syrup tapped in a particular region at a particular time of year, resulting in a less flavorful and unique experience. If you live in a region where maple syrup is produced, seek out local sugarhouses that practice sustainable harvesting.
Otherwise, look for U.S. certified organic maple syrup, as some syrup makers unfortunately continue to use formaldehyde pellets and other illegal additives. Buying organic also ensures that your syrup is free from artificial ingredients and dyes, from trees that are free of pesticides and chemicals and from forests that have not been over-tapped for short-term gain.