The new body monitors could, if a driving hazard appeared imminent, trigger the car's safety systems to tap the brakes, turn off a radio, block a cellphone from ringing or take other actions.
Overall, the EPA found naturally-occurring hazardous substances, specifically arsenic, barium or manganese, in well water at five homes, and in all cases, residents now have, or will have, their own treatment systems to reduce concentrations to acceptable tap water safety levels.