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Test a Swimming Hole's Water Quality by Sight by Looking for Insects [Safety] It's tempting to want to jump right into the first plot of open water you see when it's 100 degree out, but if you want to keep yourself safe from disease you should test the water first. Thankfully, no scientific equipment is required. According to researcher Pilar Carreras over on the Wired How-To Wiki you only need to know which insects to look for. More »
Test a Swimming Hole's Water Quality by Sight by Looking for Insects [Safety]
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