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Monitoring shows high water, lower salinity in places; seagrass improving in parts of lagoon
Summary
Agency monitoring through October 2025 found unusually high water levels across the Indian River Lagoon, localized salinity declines after heavy October rain, mixed phytoplankton blooms and localized seagrass gains; oyster recruitment in the St. Lucie Estuary showed a strong June pulse and elevated September densities.
Lauren Hall, an environmental scientist with the St. Johns River Water Management District, told the Indian River Lagoon Council on Nov. 7 that August–October rainfall was above average and that some localized Titusville sites recorded more than 20 inches in October.
Hall said continuous-monitoring sites recorded very high water levels — ‘‘at least half a meter higher than what I’m expecting when I arrive at these sites’’ — and salinity declines in response to the heavy rain, with Banana River and Titusville stations now under 20 practical salinity units (PSU) at times. She noted the Vero Beach sensor shows greater variability because it sits near freshwater tributaries and…
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