Be Informed About Harmful Algal Blooms Before Enjoying the Water this Summer
Adapted from VDH Website and VDH Press Release
With the fun of summer approaching, please remember to be safe on or in the water. One way to do that is to stay informed about the occurrence of Harmful Algal Blooms (HABs). For Orange County residents, Lake Anna is the most likely nearby body of water to experience a HAB. Before swimming, check the Virginia Department of Health ’ s (VDH) HAB map to see if there are any advisories in effect.
Harmful Algal Bloom, photo from VDH website
HABs occur as the result of algae, which are naturally - occurring microscopic organisms that are found in fresh and salt waters of Virginia and around the world. Many are beneficial because they are major producers of oxygen and food for many of the animals that live in these waters. Most algae do not harm people, wildlife, or the environment. But some types of algae in Virginia can be dangerous. Algae species in fresh and salt water may multiply rapidly when environmental conditions are favorable for their development. The great number of algal cells in the water results in what is called an algal bloom. A bloom often (but not always) results in a color change in the water. Algal blooms can be any color, but the most common ones are red or brown and are known as either “ red ” or “ brown ” tides. Most algal blooms are not harmful but some do affect fish and humans, as well as other animals like birds and marine mammals. If water is discolored, murky, has an odor, or if there appears to be a film on the water surface, swimming is not advised for humans or pets. Several waterways are regularly monitored by the Virginia HAB Task Force for evidence of HAB formation. Those noticing the characteristics mentioned above on a Virginia waterway are encouraged to submit their observations using the HAB online report form so the HAB Task Force can conduct surveillance of the area. To report health effects contact the HAB Hotline: (888) 238 - 6154. Residents should also be aware that the VDH is currently investigating a cluster of gastrointestinal (GI) illness that began at Lake Anna over the Memorial Day weekend . At the time of publication, the VDH release indicated that the illness was likely not HAB - related, as the type of illness reported is not associated with HABs. In general, the following tips are recommended to help avoid spreading and contracting illness in natural waters: • Never drink untreated water, and don ’ t swim if skin has cuts or open wounds. Natural waters such as rivers, lakes, and oceans contain germs and contaminants, which can cause illness. • Wash hands after using the bathroom and before preparing and eating food. • Avoid swimming near storm drains (pipes that drain polluted water from streets) along into natural waters. • Avoid swimming if vomiting or experiencing diarrhea. • Don ’ t go in water if there is a film on the water, and keep pets out as well. This film may indicate an algal bloom and some algae produce toxins that can make people sick. • Shower or bathe after swimming to wash off possible germs and contaminants. • Avoid swimming for three days after a heavy rain. Germs can come from overflowing sewage, polluted storm water & runoff from land. • Properly dispose of human waste by discharging boat sewage at marinas with a pump - out unit or dump station.
Visit www.SwimHealthyVA.com for more healthy and safe swimming tips.
Page 26 | June 2024
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