CHARLESTON, S.C. (WCBD)- With heat index values expected to boost feels-like temperatures into the mid-100s this weekend, Lowcountry residents and visitors will no doubt be searching for a way to cool off.

And while a dip in one of the area’s many swimming holes or the Charleston harbor may seem like the perfect idea, there are a few local waterways with high levels of bacteria making them an unsafe option.

Out of 20 tested sites, Charleston Waterkeeper reported high levels of Enterococcus bacteria at 4 sites– Hendricks Park, upper Ellis Creek, and two portions of Shem Creek.

Bacteria results over 104 MPN/100 mL mean water quality is poor and with more rain in the area this week, there are still high results lingering.

“When bacteria levels are high, that means pathogens may also be present. We’re talking about things like Cholera, Tuberculosis, Staph, Vibrio, some really nasty things that can get you sick. So its important that you pay attention to the data,” said Andrew Wunderley, the Executive Director of Charleston Waterkeeper.

Looking to the North, bacteria levels in the Ashley River have come down, returning that spot to GREEN status. Unfortunately, Hendricks Park remains RED despite numbers coming down from last week, meaning swimming and other water-based activities should be avoided in Filbin Creek.

Boaters and swimmers in the Charleston Harbor should have no worries as all points of the Harbor from Melton Demetre Park to Patriots Point are clear.

As expected, things look a little dicier in Mount Pleasant. There’s no trouble in the lower reaches at Shem Creek Park, but the boat landing and residential portions are not a safe option this week. The Cove and Hobcaw Creek both look good to go, though!

Mixed news continues as we head to James Island where Ellis Creek is RED in the upper reaches, but GREEN in the lower reaches. All GREENS for the rest of the island at Sol Legare, Clark Sound, and the Folly River.

Want to launch the boat from somewhere new this weekend? Wappoo Cut Boat Ramp is a great option as it shows no signs of high bacteria levels.

No signs of trouble at the beaches either where Isle of Palms and Sullivan’s Island are both GREEN according to the latest DHEC data. No data was collected for Folly Beach, Kiawah Island, or Seabrook Island this week.

You can explore the map here.