Blue Hole Water Quality Test Results

2023 Water Quality Results (E. coli)

For primary contact recreation, the geometric mean criterion for E. coli is 126 per 100mL.

"Primary contact recreation" refers to activities where people come into direct contact with water, like swimming or wading. The term "geometric mean criterion for E. coli" is a way to measure the level of bacteria called E. coli in the water. Imagine you have a cup of water, and you want to know if it's safe for swimming. The "geometric mean criterion for E. coli" is a rule that says for primary contact recreation, the average level of E. coli bacteria in the water should be no more than 126 bacteria for every 100 milliliters of water.

So, if the water has more than 126 E. coli bacteria in every 100 milliliters, it might not be safe for swimming. If it has fewer than 126, then it's considered safe for people to enjoy activities like swimming without worrying about getting sick from the bacteria in the water. These standards are set by the Texas Commission on Environmental Quality. More info here - Texas Surface Water Quality Standards