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Weekly Water Watch

Weekly Water Watch IconWeekly Water Watch is IEC’s summer newsletter that provides weekly updates on Iowa E. coli and microcystin beach advisories, important water quality news, and water-related events across the state.   

Weekly Water Watch started in 2018 to increase awareness of Iowa’s recreational lake water quality and make monitoring data more accessible and easy to understand.  

Learn more about beach monitoring.

Current Beach Advisories - Week of August 14, 2020

Twelve (12) E.coli-related Advisories:

Backbone Beach (Dundee, Delaware County, IA)
Denison Beach (Black Hawk Lake, Lake View, Sac County, IA)
George Wyth Beach (Waterloo, Black Hawk County, IA)
Lake Darling Beach (Brighton, Washington County, IA)
Lake Keomah Beach (Oskaloosa, Mahaska County, IA)
Lower Pine Lake Beach (Eldora, Hardin County, IA)
McIntosh Woods Beach (Clear Lake, Ventura, Cerro Gordo County, IA)
Nine Eagles Beach (Davis City, Decatur County, IA)
North Overlook Beach (Lake Red Rock, Pella, Marion County, IA)
Prairie Rose Beach (Harlan, Shelby County, IA)
Union Grove Beach (Gladbrook, Tama County, IA)
Whitebreast Beach (Lake Red Rock, Pella, Marion County, IA)

Two (2)  Beaches with a Microcystin-related Advisory: 
Lake Darling Beach (Brighton, Washington County, IA)
Union Grove Beach (Gladbrook, Tama County, IA)


Read Past Weekly Water Watch Issues

2020

August 7, 2020 July 31, 2020 July 24, 2020
July 17, 2020 July 10, 2020 July 3, 2020
June 26, 2020 June 19, 2020 June 12, 2020
June 5, 2020 May 29, 2020 May 22, 2020

2019

September 6, 2019

August 23, 2019 August 16, 2019
August 9, 2019 August 2, 2019 July 26, 2019
July 19, 2019   July 12, 2019   July 5, 2019  

Notable Statistics from Summer 2019

  • Total number of E. coli advisories = 60 
  • Total number of microcystin advisories = 21 
  • Honey Creek Resort Beach, Lake MacBride, and North Twin Lake East Beach experienced their first recorded advisories for microcystin in 2019 since data collection began in 2006. 
  • Of 37 weekly monitored beaches, 20 beaches recorded swim advisories in 2019. 17 beaches did not record an advisory. 
  • Backbone Beach was under advisory for E. coli for the first 13 weeks out of 15 weeks total in 2019. 
  • McIntosh Woods Beach at Clear Lake was under advisory for E. coli the last 9 weeks of the summer out of 15 weeks total in 2019. 
  • If Iowa had adopted the EPA’s recommended advisory threshold for microcystin, which is 8 micrograms/L, an additional 14 advisories would have been issued for microcystin in 2019.