Don't think it's the well because the bathroom sink doesn't smell like dirt, just the kitchen. Soaked the faucet head in vinegar for 5 min and it still smells. It's harmless since the water tastes fine and doesn't leave a smell on dishware but it's just weird. Anyone know what might be up? Google says it could be an algae bloom in the well itself.
Most common culprit is a burst pipe in the ground somewhere. Doesn't mean it definitely is but I'd suspect that first.