On December 5, 2024, the California Water Quality Monitoring Council convened for the Fall 2024 CCHAB Network Meeting, where significant discussions centered around recent harmful algal blooms (HABs) and their devastating impact on local fish populations. The meeting highlighted two major fish kill incidents in 2024, underscoring the ongoing challenges posed by water quality issues in California.

The first incident occurred at Lake San Antonio in Monterey County, where a substantial fish kill was reported on July 4, 2024. The California Department of Fish and Wildlife (CDFW) noted that over 200,000 fish, primarily threadfin shad, were estimated to have died due to the effects of a harmful algal bloom. Despite monitoring efforts, the timing of the investigation meant that the peak of the fish kill was missed, complicating the assessment of the bloom's severity. CDFW staff conducted extensive surveys, covering 1.4 miles of shoreline and examining over 4,500 fish, revealing concerning signs of low dissolved oxygen levels in the affected species.

The second significant event took place in the East Walker River, where anoxic water was released from Bridgeport Reservoir, leading to another fish kill. Approximately 48,000 fish, including Sacramento perch and brown trout, were reported dead. This incident was linked to a known harmful algal bloom in the reservoir, which had previously shown the presence of toxins. Local residents described the water as an \"electric green slug,\" indicating the severity of the bloom.

These incidents reflect a troubling trend in California's water bodies, where harmful algal blooms are becoming increasingly common and are linked to significant ecological impacts. The discussions at the meeting emphasized the need for ongoing monitoring and proactive measures to address water quality issues, particularly as they relate to public health and local ecosystems. As the state grapples with these challenges, the CDFW's efforts to investigate and mitigate the effects of HABs will be crucial in protecting both aquatic life and recreational opportunities for the community.