Water systems play a critical role in protecting public health and work continuously to meet or surpass federal and state drinking water regulations. While regulatory compliance with health-based standards is essential for maintaining customer trust, public perception of water quality is also strongly influenced by taste and odor (T&O) compounds causing earthy, musty or bitter flavors. Although these compounds may not be associated with direct health risks, they can be produced by both cyanobacterial and non‑cyanobacterial species. Cyanobacteria can proliferate under favorable environmental conditions, forming harmful algal blooms (HABs) that may produce cyanotoxins harmful to humans and animals. The U.S. Environmental Protection Agency has issued Health Advisory levels for select cyanotoxins, and many states have developed their own guidance and response frameworks for water systems during HAB season. These resources emphasize the need for a multifaceted approach, including monitoring strategies, communication plans, and system‑specific HAB response plans. The challenge for water utilities is making these plans actionable and integrated into daily operations rather than existing as stand‑alone documents that operators are unsure how to use. American Water has developed a comprehensive HAB readiness program that integrates operational teams, regulatory understanding, source‑water risk assessment, frontline employee training, and the use of science‑based tools and monitoring strategies. The program also emphasizes effective communication and early‑detection capabilities to support timely and informed decision‑making. This presentation will outline the key components needed to build a robust HAB preparedness and response program that enhances water system resilience and protects public health.