If pot is legal in your state, can the fire you for pot in your body? It stays in you for 6 weeks, allegedly. How about pre-employment screenings, random drug tests???
Most places, including here are using a saliva test for THC instead of a urine test. This shows current use, not what you did last weekend. Random drug testing is not done here, but some larger industrial employers are requiring testing for new hires and usually mandates it after and accident or incident.