The Iowa Policy Project keeps producing good reports about the causes of water pollution and how to address it.
Our report last week, Managing Water Pollution With Urban Wetlands: How Cities Reduce Contamination from Farms and Urban Development, was released on October 30. This IPP report, authored by J. Elizabeth Maas & E. Arthur Bettis, received a great deal of media attention. It was front page above the fold in both the Cedar Rapids Gazette and the Iowa City Press-Citizen. It was also covered by the Des Moines Register, Iowa Public Radio and WHO Radio, and the subject of a talk show on KVFD-AM in Fort Dodge.
While our report dealt with urban wetlands, many of the questions from the media folks who participated in our call-in news conference were about agricultural wetlands. That is no surprise since so much of the water pollution problems in Iowa come from the farm.
IPP pointed out that reality in a 2010 report that can be found on our website: Solution to Pollution: It Starts on the Farm by Andrea Heffernan, Teresa Galluzzo and Will Hoyer, released in September 2010. That report pointed out that so little land in Iowa is devoted to urban uses (lawns or golf courses) that even if urban application rates of Nitrate and Phosphorus fertilizer were much higher than that on farms, the fact that two-thirds of Iowa land is in corn or soybeans means that only 2 percent of the pollution from land application of fertilizer comes from lawns and golf courses.
Agriculture still dominates even if you include sewage treatment plants in the urban share of nutrient pollution (see graph below).
So the takeaway message — water pollution in Iowa comes from agriculture. We all have an obligation to clean up our rivers, lakes and streams and no sector can be exempt. It is not a voluntary matter.