Water Quality Advisory Lifted at River-to-Sea Preserve in Flagler County

The Florida Department of Health in Flagler County has lifted a water quality advisory for River-to-Sea Preserve, the county announced August 13. Tests conducted August 10 showed Enterococcus bacteria levels at the preserve have returned to acceptable levels under state guidelines, clearing the 9805 N. Oceanshore Boulevard site for recreational use.

The preserve, located in the northeastern portion of Flagler County along the coast, is a popular destination for beachgoers and nature enthusiasts. The advisory lift marks the end of a precautionary period during which elevated bacteria levels posed potential health risks to swimmers and water-contact recreation.

What's happening

Water samples taken August 10 at River-to-Sea Preserve showed Enterococcus bacteria concentrations within the acceptable range established by Florida's healthy beaches program guidelines. The Florida Department of Health-Flagler issued the all-clear based on those test results, which are published on the department's FloridaHealth.gov/HealthyBeaches portal.

River-to-Sea Preserve sits at 9805 N. Oceanshore Boulevard (State Road A1A) in the northeastern corner of Flagler County, where the preserve's beaches and tidal areas connect to the Atlantic Ocean. The site is part of Flagler County's coastal conservation network.

The state health department routinely monitors Enterococcus bacteria levels at public beaches throughout Florida. Enterococcus is an indicator organism found in the intestines of warm-blooded animals; elevated levels in coastal waters can signal contamination from stormwater runoff, septic systems, or wildlife, and may correlate with the presence of pathogens that cause gastrointestinal illness, skin infections, and other ailments in swimmers.

What this means for beachgoers and coastal residents

The advisory lift removes health-based warnings for water contact at River-to-Sea Preserve, restoring confidence for families, surfers, kayakers, and other visitors who use the preserve's beaches and inlets. During an advisory period, the Florida Department of Health recommends against swimming and other activities that involve ingesting or prolonged contact with the water, particularly for children, the elderly, and those with compromised immune systems.

River-to-Sea Preserve is a key recreational asset in northeast Flagler County, drawing visitors to its beaches, walking trails, and tidal observation areas. The preserve's location along Oceanshore Boulevard places it within a corridor that has seen steady residential development and short-term rental activity in recent years, making water quality a community priority for both residents and the tourism economy.

Water quality advisories, while temporary, can affect visitor counts and perceptions of beach safety. Flagler County's coastal areas compete with neighboring St. Johns County beaches to the north and Volusia County's surf towns to the south for tourist dollars and quality-of-life reputation. Reliable water quality and transparent testing help maintain the area's standing as a safe destination.

Understanding bacteria levels and testing frequency

Florida's Healthy Beaches Program, administered by the Department of Health, samples recreational ocean and bay waters weekly during the beach season and at least once monthly year-round. When Enterococcus concentrations exceed the state's single-sample threshold—or when a geometric mean of multiple samples over time exceeds long-term standards—the health department issues an advisory for that specific beach or site.

Advisories remain in place until follow-up samples show bacteria levels have returned to acceptable ranges. The August 10 test results that prompted the River-to-Sea Preserve lift indicated contamination had cleared, likely aided by tidal flushing, reduced rainfall runoff, or dissipation of the pollution source. The public can view current and historical test results for all monitored Flagler County beaches, including River-to-Sea Preserve, on the FloridaHealth.gov/HealthyBeaches website.

Enterococcus advisories at Florida beaches are often linked to stormwater carrying pollutants from streets, lawns, and aging septic systems into coastal waters. In Flagler County's northeastern coastal zone, development has intensified along A1A and the barrier island areas over the past decade, increasing impervious surfaces and stormwater volumes that drain toward preserves and inlet systems. River-to-Sea Preserve's location near tidal inlets means it receives runoff from surrounding upland areas as well as tidal mixing from the Atlantic.

What residents and county officials watch for

While this particular advisory has been lifted, water quality remains a long-term concern in coastal Flagler County as the population grows. The county's northeastern beaches and the A1A corridor have seen waves of new single-family homes, townhomes, and short-term rental conversions in communities such as Hammock Dunes, Flagler Beach, and Beverly Beach. Each new roof and driveway adds stormwater that must be managed to prevent pollutant loading into the surf zone and estuarine preserves.

Flagler County government and environmental advocacy groups monitor bacteria trends as an indicator of whether stormwater infrastructure and septic-to-sewer conversions are keeping pace with development. Persistent or recurring advisories can prompt calls for stormwater improvements, septic system inspections, or stricter development controls. The county's Stormwater Utility and its partnerships with the St. Johns River Water Management District fund projects to reduce nutrient and bacteria runoff, though funding and right-of-way constraints limit the speed of systemwide upgrades.

For property owners near River-to-Sea Preserve and along the coast, water quality directly affects both recreational enjoyment and property marketability. Homes and vacation rentals advertised for their beach access and natural surroundings rely on clean, swimmable waters to justify premium prices. Advisories, even short-term ones, can dent rental bookings and raise buyer concerns during real estate transactions.

What happens next

The Florida Department of Health-Flagler will continue its regular monitoring schedule at River-to-Sea Preserve and other county beaches. New samples are typically collected weekly during the summer season, with results posted online within days. If bacteria levels spike again, a new advisory would be issued and publicized through county channels and the Healthy Beaches portal.

County officials encourage residents and visitors to check FloridaHealth.gov/HealthyBeaches before heading to the beach, especially after heavy rainfall, which can wash pollutants into coastal waters and temporarily elevate bacteria counts. The site provides current advisories, historical data, and explanations of testing protocols for all monitored beaches in Florida.

The advisory lift at River-to-Sea Preserve is part of the ongoing rhythm of coastal management in fast-growing Northeast Florida, where maintaining environmental quality alongside residential and tourism growth requires vigilant monitoring, infrastructure investment, and public transparency. As Flagler County adds thousands of new residents in its western growth corridors and continues to see coastal infill development, protecting the health of its beaches and preserves remains a priority that shapes both public health policy and the region's economic appeal.