Check for seals, wash jars, label and store. If a lid fails to seal on a jar, remove the lid and check the jar-sealing surface for tiny nicks. Foods in single unsealed jars could be stored in the refrigerator and consumed within several days. As altitudes increase air becomes thinner, and this affects both pressures and boiling points in home canning. Using the water bath process times for canning food at sea level may result in spoilage if you live at altitudes of 1,000 feet or more.
Water boils at lower temperatures as altitude increases.
Lower boiling temperatures are less effective for killing bacteria. Increasing the processing time or canner pressure compensates for lower boiling temperatures. Select the proper processing time and canner pressure for the altitude where you live. The altitude in North Dakota varies from 800 feet above sea level in the east to 3,000 feet in the west. The map below shows the approximate altitude of areas of North Dakota.