Recreational Water Watch for Lake Hartwell

May 8, 2025 Update: Recreational Water Watch for Lake Hartwell Remains in Effect. 

On May 6, teams from SCDES's Aquatic Science Division collected new water samples from 16 locations around Lake Hartwell and observed the harmful algal bloom (HAB) in several locations.

Based on the latest round of lake observations and water sampling, SCDES recommends (1) avoiding direct contact with lake water in areas where the HAB is observed and (2) keeping pets and animals from swimming in or drinking lake water where the HAB is observed  

Visit our Algal Bloom Monitoring Map for the most up-to-date information.  

A new era in environmental protection.

Formerly a part of DHEC, SCDES is committed to preserving South Carolina’s air, land, water and coast through Science, Service and Sustainability.

Bureau of Water

BOW protects the state’s water resources for drinking, swimming, fishing and other uses that benefit all South Carolinians.

Bureau of Land and Waste Management

BLWM has critical oversight of certain industries, like landfills and mines, that helps safeguard our state’s land resources.

Bureau of Air Quality

BAQ protects the air we breathe by ensuring industries comply with state and federal air quality standards.

Bureau of Coastal Management

BCM helps ensure the appropriate use, development and conservation of South Carolina's irreplaceable coastal resources.

Bureau of Regional and Laboratory Services

BRLS responds to environmental incidents, samples and monitors air and water, and investigates tips received from the public.

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