 contaminants that are really hard to to to get out and then those are the ones we don't want to use for for agriculture early or let alone drinking oh okay all right so uh what do you i mean what do you i mean los angeles also was uh experimenting they got a project going with uh with with sewage you know with with with their all their sewage water and they're turning it into drinking water i would assume that that too has to be extremely expensive thing to do