Improving Critical Infrastructure Cybersecurity (Fiscal Year 2017 Report to Congress) [open pdf - 529KB]
From the Executive Summary: "This report highlights activities and initiatives that DHS has put forth to reduce the reasonable likelihood that a single cyber incident could result in catastrophic harm to public health or safety, economic security, or national security. Critical infrastructure entities where such an incident could occur are identified pursuant to Section 9(a) of Executive Order 13636. As such, this report will refer to these entities as Section 9 entities. [...] DHS, in coordination with sector-specific agencies, supports a range of voluntary cybersecurity risk management efforts that support Section 9 entities by offering programs, sharing information, and providing technical assistance to help organizations reduce their individual risk. This report further details these ongoing efforts to increase the cybersecurity of Section 9 entities."
U.S. Department of Homeland Security: https://www.dhs.gov/