HURON COUNTY - Deep water test results from the Huron County Health Department have shown all beaches have tested within the safe range for E.Coli, though two tested much higher than usual.
The health department will close a beach if the geometric mean of three 100 milliliter samples of water exceed 300 E.Coli. A beach also will be closed if all samples collected in the past 30 days exceed 130 E.Coli per 100 milliliters of water. The samples are collected at a depth of three to six feet. One sample is collected on the right side of the beach, one on the left, and one on the center.
Lighthouse County Park beach had the highest two individual test results. The right side result was 579.4000 E.Coli colonies per 100 milliliters collected, and the center test result was 365.4000. The beach remained open because the left side result was only 75.9000, bringing the geometric mean to 252.3459.
The beach with the second highest E.Coli test results was at Veterans Park. The left-side result was 235.9000; the center was 209.5000; and, the right was 204.6000, bringing the geometric mean to 216.2416.
The 30-day mean for both beaches was much lower: 19.5087 for Veterans Park and 24.4126 for Lighthouse County Park.
The third highest E.Coli presence at a Huron County beach was minimal —  Port Crescent State Camping Area had a geometric mean of 20.4339.
This is the seventh week beaches have been tested. 


Those with questions can contact Tip MacGuire at 989-269-9721, extension 137.



Test Results
(Geometric mean of E.Coli colonies for three 100 ml samples of water)

Bird Creek County Park - 10.1552

Caseville County Park - 5.0764

Harbor Beach City Park - 2.4987
Jenks County Park - 12.8510
McGraw County Park - 2.000
Oak Beach County Park - 0.0001

Philp Park - 1.5874

Port Crescent State Park (camping area) - 20.4339

Port Crescent State Park (day) - 0.0464

Sleeper State Park - 0.0001

Thompson Park - 0.0001

Veterans Park - 216.2416
Lighthouse County Park - 252.3459