Cedar Rapids Gazette: Iowa has fewer lakes, rivers and streams on its 2020 draft list of impaired waters compared with the 2018 review cycle, the Iowa Department of Natural Resources reported. “For the first time, there was an overall decrease in the number of combined categories 4 and 5 impairments,” Ken Krier, senior environmental specialist, said Tuesday in a news conference. Still, 45% of 1,300 water body segments reviewed for the 2020 list are impaired — meaning they don’t meet at least one standard for their intended use such as drinking, recreation or supporting aquatic life.