Dahanu Thermal Power Station The Dahanu Power Station is certified for Environment Management System ISO Accountability SA 8000:2008, Quality Management system ISO 9001:2008, Information Security management System ISO 27001:2005 and Occupational Health and Safety Assessment studies OHSAS 18001:2007 and National Accreditation Board of Laboratories (NABL) accreditation for DTPS coal testing laboratory, ISO/IEC 17025:2005.