Significantly the highest proportion of sterile sheep are found in the area southwest of the smelters, in average 7.4%, and also the lowest numbers in produce. In that particular area the concentration of fluoride in sheep jawbone has also been the highest in recent years.
Marktækt hæst hlutfall geldra eldri áa, að meðaltali 7,4%, og lægstar afurðatölur eru á bæjum suðvestanmegin við iðjuverin, á því svæði þar sem flúor hefur á undanförnum árum mælst einna hæstur í kjálkabeinum sauðfjár.