No idea where the district sourced it. We use 4 tabs in the reservoir with water to dilute to a strength that is supposed to sterilize in 1 minute. You can put fewer and it takes longer. Our AD went with the max just to be safe with his protocols (and we're matching). Our district has like 5 or 6 of these now. Not sure if it came with the two batteries or not, but the single battery seems to go a couple weeks without charging in the daily spraying they were doing.