According to the authors, "dirty electricity" is high-frequency voltage transients riding along the 50 or 60 Hz electricity provided by the electric utilities. It is generated by arcing, by sparking and by any device that interrupts current flow, especially switching power supplies.
Urine samples were taken a few days before and after the cleanup (reducing exposure by installation of filters), and every 2 weeks for the next 18 weeks.
Before "cleanup", the urinary dopamine level of only 1 of 7 volunteers was within normal levels, while 4 of 7 phenylethylamine levels were normal. After an initial decline, over the next 18 weeks the dopamine levels gradually increased to levels above normal lab levels. Average phenylethylamine levels also rose gradually to levels above normal lab levels.
Neurotransmitters may be biomarkers for "dirty electricity" and electromagnetic field exposures. The authors believe that "dirty electricity" is a chronic stressor of electrified populations and is responsible for many diseases.