After 1,892 days, the drought is over in San Joaquin County. That’s the conclusion of the federal government, which Thursday morning issued new maps showing the entire county — and indeed, 79 percent of the state — free from any kind of drought designation. For San Joaquin, it is the first time since Dec. 27, 2011. Portions of San Joaquin had still been considered “abnormally dry” heading into this week, but the U.S. Drought Monitor lifted that finding Thursday, citing an improvement in groundwater levels across the San Joaquin Valley.