Between August and November 2017, Hindustan Unilever Ltd. (HUL) conducted soil remediation trials at the site of its form thermometer factory in Kondaikanal, India. The trials were intended to address mercury contamination dating back to 2001. In January 2018, environmentalists raised concerns that the trial failed to meet remediation targets and may have released more mercury into the evironment. HUL denied the allegations, stating that applicable standards were achieved in cooperation with the Tamil Nadu Pollution Control Board (TNPCB) and the Scientific Experts Committe (SEC) (a body create by a Supreme Court Monitoring Committee). 

In November 2018, the National Green Tribunal (NGT) approved the continuation of the remediation process at a target mercury level of 20mg/kg. Environmental activists previously opposed this level, demanding a target of 6.6mg/kg.