Web Archiving Environmental Scan
In this environmental scan, made possible by the generous support of the Arcadia Fund, we document web archiving programs from 23 institutions from around the world and report on researcher use of – and impediments to working with – webarchives. The collective size of these web archiving collections is approximately 3.3 petabytes, with the smallest collection size under	one terabyte (TB) and the largest close to 800TB. The longest-running programs are over 15 years old; the youngest started in 2015. The scan does not include corporations or for-profit institutions archiving their web	presence for business reasons,	but focuses on cultural memory institutions – libraries, museums and	archives – collecting for researcher and historian use. For each section in thi report we identify common concerns and questions to be addressed and present them as opportunities for future research and investment.