The Cybersecurity and Infrastructure Security Agency (CISA), the Federal Bureau of Investigation (FBI), the Environmental Protection Agency (EPA), and the National Security Agency (NSA) have released a joint Cybersecurity Advisory (CSA) outlining the ongoing cyber threats to the U.S. Water and Wastewater Systems (WWS) Sector. The advisory offers a list of mitigations and resources to assist the WWS sector in strengthening cybersecurity resilience and practices.