New evidence on old water problem: It’s grown, and is getting worse

Vegetative buffers can address the main causes of the worsening algal bloom problem: climate change and nutrient runoff.

The Iowa Policy Project released a new report that brings attention to the harmful algal bloom problem that is not being addressed adequately in the state.

There have been numerous reports and articles that discuss the problem, including an IPP report that was released nearly 10 years ago, but what is different about this new report is that it highlights new science and evidence that indicates that the problem is growing worse.

The 2014 water crisis in Toledo, Ohio, where toxic blue-green algae shut down the water system, was a wake-up call for those responsible for ensuring our drinking water is safe. The U.S. Environmental Protection Agency and the Iowa Department of Natural Resources are therefore aware of the looming threat posed by blue-green algae.

Recent studies have shown that the harmful algal bloom problem is more prolific and this is tied to changes in weather and landscapes due to climate change and due to increased nutrient runoff.

Iowa’s Nutrient Reduction Strategy is a framework that was created to address the runoff issue in Iowa but new evidence suggests that the NRS is not enough to tackle the problem.

One approach endorsed by IPP’s new report may be effective in protecting Iowans from harmful algal blooms: the implementation of mandatory vegetative buffers throughout the state. Minnesota and Vermont already have promulgated such laws for regulations and buffers along waterways —a conservation practice proven to dramatically reduce nutrient runoff.

Buffers also have an added benefit in that they can act as a carbon sink or as carbon storage, thereby helping to curb climate change. In other words, vegetative buffers can address the main causes of the worsening algal bloom problem: climate change and nutrient runoff.

Carolyn Buckingham, an attorney with a background in environmental law and policy, is lead author of a new report for IPP on issues caused by cyanobacteria, or blue-green algae, in Iowa water.

Find the report here.