You'd probably just get a heatmap where there is little use of water. i.e. a single individual doing cocaine in a suburb would show far greater concentrations t

You'd probably just get a heatmap where there is little use of water. i.e. a single individual doing cocaine in a suburb would show far greater concentrations than 100 people doing cocaine at a rave at some farm that's irrigated on a daily basis, or 100 people doing cocaine at a wall street office party above a bunch of laundromat companies.