It seems like this is less of an impact than many crops. Traditionally, grow operations have flourished in places like British Columbia, Washington, Oregon, and

It seems like this is less of an impact than many crops. Traditionally, grow operations have flourished in places like British Columbia, Washington, Oregon, and the "Emerald Triangle" of coastal/wooded Northern California. I have no particular knowledge about how the plants grow, but I assume this means they grow well in those climates (not that they're merely more tolerated in those locales). Therefore, an outdoor grow operation could probably done with minimal irrigation and no real impact on drinking water supplies.