With growing efforts to enhance water quality and to protect public health, 2021 brought many new innovations to the water sector. From innovative PFAS treatment technologies to enhanced wastewater surveillance to track the spread of COVID-19, the following list highlights the most accessed resources featured in the Innovations for Small Systems newsletter's 2021 archive. Small Drinking Water Systems Webinar Series A webinar series hosted by EPA to communicate the latest information on solutions for challenges facing small drinking water systems. EPA Cybersecurity Best Practices for the Water Sector EPA published a webpage featuring resources to help water and wastewater utilities implement cybersecurity best practices. This new page contains various cyber resilience resources available from EPA. Tracking SARS-CoV-2 RNA through the Wastewater Treatment Process This paper presents data on SARS-CoV-2 RNA concentration and removal rates during the different stages of the activated sludge wastewater treatment process to better understand the fate of the virus at the different stages EPA Drinking Water Treatability Database (TDB) The TDB presents an overview of over 120 regulated and unregulated contaminants found in drinking water with current information on treatment processes. EPA updated the TDB on May 19 to include new references and treatment options for PFAS. Expedited Approval of Alternative Test Procedures for the Analysis of Contaminants Under the Safe Drinking Water Act; Analysis and Sampling Procedures On May 26, EPA approved 17 alternative testing methods for use in measuring the levels of contaminants in drinking water to determine compliance with national primary drinking water regulations. EPA Identifies Drinking Water Contaminants for Potential Regulation EPA announced the Draft Contaminant Candidate List 5 (CCL 5) on July 12 to include 66 individual chemicals,12 microbes, and three chemical groups – per- and polyfluoroalkyl substances (PFAS), cyanotoxins, and disinfection byproducts (DBPs). Performance of rapid sand filter – single media to remove microplastics This paper aims to analyze the effectiveness and mechanism of rapid sand filters (RSF) for the removal of microplastics (MPs) during drinking water treatment and analyze the effect of research variables on the performance of filter media. Cyanobacteria Assessment Network Application (CyAN app) On August 3, EPA launched the CyANWeb Application, which is an easy-to-use web browser-based tool that provides access to cyanobacterial bloom satellite data for over 2,000 of the largest lakes and reservoirs in the United States. Tap Talk: The Drinking Water in Rural America Podcast The Private Well Class program has launched a new podcast series, Tap Talk, which highlights the unique challenges which small public water systems and many private well users experience. 18th Annual EPA Drinking Water Workshop: Small System Challenges and Solutions This free, annual workshop, which was presented virtually in September, provided in-depth information and training on solutions and strategies for handling small drinking water system challenges. This workshop will be virtual again for 2022. Zapping Untreated Water Gets Rid Of More Waterborne Viruses Texas A&M University researchers published a paper in September 21, where they highlighted their research validating the effectiveness of Iron Electrocoagulation in the removal of viruses from water. EPA Awards $6 Million in Funding to Research Human Viruses Found in Wastewater Intended for Reuse EPA announced on October 27 that five grants have been awarded funding to research on existing and novel alternative methods to detect and monitor viruses that are excreted with feces in wastewater intended for water reuse applications. ASDWA Publishes New PFAS MCLs White Paper for States that are Considering or Developing PFAS Drinking Water Standards or Guidelines ASDWA published a PFAS Maximum Contaminant Levels (MCLs) White Paper on November 5, to serve as a resource for states that are developing or considering developing PFAS drinking water MCL regulatory standards or guidelines. EPA Announces Over $3 Million in Funding to Small Businesses to Develop Environmental Technologies EPA announced on December 14 that 30 American small businesses will receive funding to develop novel technologies to address pressing environmental and public health problems such as domestic greywater, microplastics, and lead service lines. Nutrient Smart Recognition Program WEF and EPA launched the NutrientSmart (NSmart) program in December to help reduce nutrient loadings in waterways by encouraging the adoption of enhanced nutrient management practices by water utilities and distributing information on tools and methods for lowering nutrients. Fifth Unregulated Contaminant Monitoring Rule EPA published the fifth Unregulated Contaminant Monitoring Rule (UCMR 5) on December 27 to better understand the national occurrences and levels of 29 PFAS found in the nation's drinking water systems. Check out past issues of the Innovations newsletter.