1Place lingonberries in a large pot with the water and bring to a boil. Boil for 5 to 10 minutes, and skim off any foam from the surface. Stir in sugar, bring to a rapid boil, and continue boiling for a few more minutes.
2Ladle jam into sterile jars, leaving 1/4 inch of headspace. Cover with lids, and screw on rings. Process in a hot water bath for 10 minutes to seal. Refrigerate jam once the jar has been opened.