Sustainability report 2015-16, pg 35

"Online CEMS (continuous emission monitoring system) analysers installed on stacks for continuously measuring of pollutants across locations and periodically monitoring are carried out through third party laboratories authorised by statutory agencies. Emissions across Tata Power locations are well within stipulated limits. The emissions are monitored as per the approved procedures of regulatory authorities."

"Also the monitoring is carried out by third party authorised laboratories. The measurements are sent to the respective SPCBs on a monthly basis as well as to the regional offices of the MoEFCC along with the six monthly compliance reports. "