“Amid the state’s crippling drought, many communities are fighting the growers’ use of water. Environmentally minded marijuana growers say that illegal operators and water guzzlers are giving them a bad reputation. Because there are countywide restrictions on the number of marijuana plants even legitimate growers may keep, Mr. Chaitanya said, they have an incentive to make those plants as robust as possible — and that means using more water. Mr. Chaitanya suggested that the problem was exacerbated by confusing regulations. Sheriff Allman of Mendocino County was skeptical of this. ‘That sounds like logic they’ve made up after smoking a joint,’ he observed.”
http://www.nytimes.com/2014/08/07/us/dry-california-fights-illegal-use-of-water-for-cannabis.html