Beyond the headlines, Emerald Keepers analyzed the County of San Diego’s ocean water quality test results in Coronado to document the true extent of the contamination. In 2025, Coronado had unsafe water quality 256 days out of the year and during 50 out of the 52 weeks. At its peak, bacteria levels in Coronado waters were more than 500 times above safe levels. Significant bacteria spikes along the Coronado shoreline include:Central Beach: 82,182 bacteria copies on May 6, 2025. However, the immediate need is for greater transparency on water quality.