Algae takes over

Mom eventually bought the vacation cabin we had rented, spending a full summer there for nearly 20 years.

Since 2012, the little pond has periodically closed due to cyanobacteria blooms. Also known as blue-green algae, cyanobacteria can cause digestive or respiratory problems in people or pets. At its worst it can also kill.

Moll’s Pond shares many of the same risks with hundreds of other “kettle ponds” on the Cape: Individual septic systems surround these ponds, so named because the glaciers of the last Ice Age scooped out these ponds in the shapes of kettles. Homes built on the porous, sandy soil left behind were equipped with septic systems that tend to fail within 25 to 50 years.

Here‘s the cherry on the toxic sundae: Warmer summers make the algae outbreaks more certain. Last year, the pond held out till late August before the Town of Eastham’s Health Department closed it to swimming, fishing, and boating.

Algae’s celebrity victim

Unfortunately, it's not just Cape Cod.

Until 2011, blue-green algae had never been a visitor to Oklahoma. But a combination of farm runoff and unusually hot summer weather brought the green slime to the Grand Lake o’ the Ozarks in the northeast corner of the state.

Senator Jim Inhofe went for a morning swim near his lake house. By nightfall, the Senate’s Alpha-dog climate denier was “deathly ill” with an upper respiratory illness.

He canceled a keynote speaker appearance at the Heartland Institute’s annual Deny-a-Palooza conference (my name for it, not theirs). Inhofe quipped that the environment was exacting revenge for his Senate career.

A toxic told-you-so

The warnings had been out there for years, from scientists, activists, and reporters.

Lake Erie’s return from biological death wasn’t a done deal. Blue-green algae blooms were a known threat to Toledo’s water system for years before the summer of 2014, when the algae hit the fan and half a million Toledoans lost their water supply for three days. The culprits? Agricultural runoff at the end of a particularly hot summer.

 Dead and red in the salt water

Saltwater has similar threats. A regular feature along the Louisiana Gulf Coast is the late summer Dead Zone. It’s a byproduct of the torrent of farm chemicals and fertilizers that make their way from mid-America’s fields to a growing area of offshore lifelessness.

All of which makes my little five acre pond seem like a petty complaint. But a beautiful, unforgettable place it is. Or was.

Peter Dykstra is our weekend editor and columnist and can be reached at pdykstra@ehn.org or @pdykstra.

His views do not necessarily represent those of Environmental Health News, The Daily Climate, or publisher Environmental Health Sciences.

Banner photo credit: Barnstable County Department Of Health And Environment