According to iFixit, 130 million cellphones a year are discarded with only 8% recycled correctly. The rest end up in landfills or incinerators and heavy metals are thus leaked into groundwater or into the air. Some states ban electronics from being dumped in those locations, but 32 states don't have such a law. And as an example of what could happen, iFixit points to over 41,000 acres in Indiana that was contaminated after one firm dumped electrical equipment into a landfill. The contaminant in that case is linked to liver, thyroid, and immune diseases.
Motorola CITRUS. The rest of the models in that classification are the Apple iPhone 4S, LG Remarq, Samsung Captivate, the Apple iPhone 5 and the properly named Samsung Evergreen. The six phones on the bottom, those with "high concern" are the OG Apple iPhone, Palm m125, Motorola MOTO W233 Renew, Nokia N95, BlackBerry Storm 9530 and the Palm Treo 750. The rest of the devices in the middle of the pack are of "medium concern".
Looking at the Apple iPhone specifically, heavy metals like lead, chlorine and mercury can be detected throughout the device. Still, with a score of 2.75, it has almost half of the toxic chemicals ranking of the phone on the bottom of the list. Ironically, that model too is an Apple iPhone. The original model of the handset scored a 5.0.