Cala intestinal bacteria that live in the gastrointestinal tract of warm-blooded animals, including people, horses, cows, chickens, cats, dogs and waterfowl. The bacteria released into the solid waste man and other animals and enter waterways due to lack of septic systems, sewer overflows, inadequate treatment of domestic waste, waste from animals grazing or inadequate human waste associated with camping and other outdoor activities. If a person of sewage discharged into the lake from septic systems fall and sanitary sewer overflows, most of the bacteria present are generally considered non-human origin. For most lakes, geese, gulls and ducks suggested that the main source of bacteria, especially where large populations of resident birds have become established. Fecal bacteria Escherichia coli is a good indicator of pollution by sewage and water by regular monitoring as an indicator of possible risk to human health that can swim or drink contaminated water. When sewage is present in water, high fecal count koliformnyh bacteria occurs. However, the source of a large number of bacteria can occur with human sewage. Many other mammals and birds may also contribute to this type of bacteria in the water. To determine if bacteria from human sewage, tests on more specific types of bacteria and analysis of genetic material to be filled. With additional testing, animal species have added bacteria in the water can sometimes be determined. Since 1996, Pool Beach on Lake Sammamish, Lake Washington and Green Lake were examined to determine the level of bacterial contamination and the relative risks to human health. This study strattera had local data on bacterial levels of these pools beaches did not exist. Based on this monitoring, periodic closure of beaches the region has occurred. In 1998 and 1999, one-day poll conducted bacterium in the framework of Trustees of the lake on the area lakes. Samples were collected from 27 King County small lakes with public access to assess the level of bacterial contamination. Most of the lakes surveyed had low levels of bacteria. Table 1 shows the minimum, maximum and geometric mean values among 27 lakes surveyed. Financing is available for monitoring large public beach of the lake. Lack of funding can regularly monitor the level of bacteria in the small lakes. Bacteria monitoring conducted periodically in the Countys three small basins of the lake beaches (Fivemile, pine, and wildlife). According to the Washington Water Quality Standards WAC 173-201A-030, intestinal fecal levels in the lakes should not exceed the geometric mean value of 50 colonies/100 ml and not more than 10 percent of all samples exceeding 100 colonies/100 ml. Based on limited data, the concentration of these bacteria have not been exceeded in most small lakes surveyed in King County in 1998 and 1999. Seattle King County Department of Public Health is responsible for determining the consequences for public health bacteria monitoring results, transferring this information to elected officials and the public. Under existing rules, local health workers to determine whether the water is dirty or not. Because no exact standards adopted State Department of Health to determine if a beach should be closed, the local health department must make the decision to close the beach occasionally. Typically, the Department of Health will use one of two standards to ensure their definition:
fecal Escherichia standard developed by the Federal Water Pollution Federation, which is the geometric mean 200 ml fecal coliform/100, no more than 10 percent of samples in excess of 400. 10 state standard, which is the geometric mean of 200 fecal coliform/100 mL, no single sample exceeds 1000. Lake residents can contribute, so they do not contribute to bacterial contamination of the lake. Proper storage of septic systems is a good start. Accepted by pets and proper management of waste from the animals will also help. Finally, preventing the floating of the surrounding lawns and planting vegetation on long along the shoreline to minimize bacteria on poultry. (See below).
Do not Get Goosed! What you should know
Geese and ducks like to feed on the lush grass well kept lawns. With few natural enemies to keep their numbers in balance, waterfowl have become an obstacle for many people on the lake and the main source of bacteria that enter the water. Waterfowl prefer to rest and feed in open grassy areas near water, and they usually walk on land, using routes that allow them easy access. One way to prevent this webby things is to create a buffer between native plants and the water's edge the lawn. Fearing hidden predators, waterfowl do not want to go on vegetation at lunch on the grass. Large boulders placed in front of the buffer can improve. For Lake Stewardship Program or the content of this page, please contact, 206-296-8382. .
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