An Indian pollution regulator has alleged wastewater discharged from a Tata components factory for Apple's iPhone has contaminated the groundwater for nearby farms and warned of a forced shutdown unless Tata gives a satisfactory explanation. India's Tata Electronics is central to Apple's push to diversify iPhone production beyond China and is the second-biggest supplier to Apple in South Asia after Taiwan's Foxconn. The Tata plant under investigation is in Hosur in southern Tamil Nadu state and makes back panels and other components for iPhones. Farmland owners near the plant had complained for months to the Tamil Nadu Pollution Control Board that wastewater from the factory was contaminating their land and open wells.