York Region Beach Sampling Program York Region Community and Health Services monitors water quality at York Region's public bathing beaches during the summer months to ensure that the water quality is safe for swimming. The York Region Beach Sampling Program is scheduled to begin the second week of June every year. Community and Health Services staff will collect a minimum of five water samples from each beach sampling site once a week.  These samples are tested by the Ministry of Health and Long-Term Care, Laboratories Branch, for bacterial quality. High levels of bacteria can cause skin, ear, eye, nose and throat infections as well as stomach disorders. If bacterial counts exceed provincial guidelines (100 E.coli per 100ml of water), Community and Health Services will post a sign at the beach advising the public that the water is unsafe for swimming. Beaches will be closed when there are indications of hazardous or infectious materials present in the water, or in the event of a blue-green algae bloom.  When the water is once again safe for swimming, the beach will be re-opened.   The quality of  lake water can change dramatically day to day, hour to hour or even minute to minute. York Region Health Services advises users of recreational waters not to swim for up to 2 days following heavy rainfall as water may be polluted at all swimming locations with high levels of bacteria from a variety of pollution sources. Also, high wave action may stir up bacteria settled on the lake bottom. If you can't see your feet, it may not be safe to swim. For this week's results, click here Environment Canadaclassifies rainfall as follows:  Heavy > 7.55 mm per hour  Medium 2.6 mm - 7.5 mm per hour  Light < 2.5 mm per hour The following York Region beaches are tested: Lake Simcoe: Balfour Beach Claredon Beach De La Salle Beach Franklin Beach Holmes Point Island Grove Jackson's Point Beach Keswick Beach North Gwillimbury Park Glenwoods Beach Peninsula Motel Port Bolster Beach Willow Beach Other Locations in York Region: Cedar Beach at Musselman's lake in Whitchurch-Stouffville Recreation Island at Seneca College in King City   Sunset Beach at Lake Wilcox in Richmond Hill is no longer being sampled by the Medical Officer of Health.             There are many factors that contribute to water pollution leading to beach postings at our beaches, including: seasonal and storm surface run-off into rivers and lakes sewer overflows agricultural manure and feedlot run-off malfunctioning private sewage disposal system domestic pet waste run-off large populations of waterfowl warm water temperatures boating waste How can you help to keep our beaches clean and safe for swimming during the summer months? If you own a pet, please observe local "stoop and scoop" by-laws and remove dog faeces from city streets, public parks and private property Do not attract animals or birds to beaches by feeding them If you are planning an addition to your home, contact your local building department to ensure that plumbing fixtures are properly connected to municipal sanitary sewer pipes or your private sewage disposal system Upgrade and keep in good working order your private sewage disposal system In agricultural communities, fence livestock away from streams and provide them with alternate water sources Ensure that run-off from feedlots and manure piles is properly maintained Practice pollution-free boating by disposing of human wastes hygienically Do not go into the water if you have an infection or open wound. Several private beach associations monitor their own beach water quality. York Region Health Services welcomes the opportunity to assist beach associations with the set-up of water sampling programs.   To find out if your favourite beach is safe for swimming or for more information about the Beach Sampling Program contact York Region Health Connection at 1-800-361-5653, TTY 1-866-252-9933 (toll free) or visit this page for up to date Beach Sampling Results on the York Region website.