 As a kid, I remember our well, dad had to take a water sample every so often to the state of North Dakota to make sure our well was still good. And I think there are some areas of the state where that is still the case if you're not on rural water for your farm. And what's the main threat with these? I know that it's different per situation versus, say, a watering hole versus a well you're pumping water out of. Is it algae bloom poison? Is it nitrates?