Iowa DNR warns E. coli, algae too excessive for swimming at 15 seashores

If you are trying to go to an Iowa seaside between rain showers, there are greater than a dozen you will need to keep away from.

A complete of 15 seashores are usually not advisable for swimming, as of Aug. 14. That’s one fewer seaside than within the earlier week’s Iowa Department of Natural Resources seaside monitoring report.

The Iowa DNR offers weekly updates on which state seashores are experiencing excessive ranges of E. coli or algae that may be harmful to swimmers. You can test the latest reports on the DNR website or by calling 515-725-3434.

Staff gather weekly samples at 41 state-owned swimming seashores to find out the general public’s danger of coming involved with waterborne illnesses. Testing begins per week earlier than Memorial Day and runs via Labor Day.

What Iowa DNR seashores are usually not advisable for swimming?

Backbone Beach

• Beach classification: Vulnerable
• Last check date: Aug. 12
• Test outcomes: Exceeded five-sample Geomean commonplace for E. coli

Beeds Lake Beach

• Beach classification: Vulnerable
• Last check date: Aug. 11
• Test outcomes: Exceeded single-sample restrict and five-sample Geomean commonplace for E. coli

Clear Lake State Park Beach

• Beach classification: Less weak
• Last check date: Aug. 11
• Test outcomes: Exceeded single-sample restrict and five-sample Geomean commonplace for E. coli

Emerson Bay Beach

• Beach classification: Vulnerable
• Last check date: Aug. 12
• Test outcomes: Exceeded five-sample Geomean commonplace for E. coli

George Wyth Beach

• Beach classification: Vulnerable
• Last check date: Aug. 12
• Test outcomes: Exceeded five-sample Geomean commonplace for E. coli

Lake Ahquabi Beach

• Beach classification: Less weak
• Last check date: Aug. 12
• Test outcomes: Exceeded five-sample Geomean commonplace for E. coli

Lake Darling Beach

• Beach classification: Vulnerable
• Last check date: Aug. 10
• Test outcomes: Exceeded single-sample restrict and five-sample Geomean commonplace for E. coli

Lake Manawa Beach

• Beach classification: Vulnerable
• Last check date: Aug. 11
• Test outcomes: Exceeded single-sample restrict and five-sample Geomean commonplace for E. coli

Lake of Three Fires Beach

• Beach classification: Less weak
• Last check date: Aug. 12
• Test outcomes: Exceeded single-sample commonplace for E. coli

McIntosh Woods Beach

• Beach classification: Vulnerable
• Last check date: Aug. 11
• Test outcomes: Exceeded single-sample restrict and five-sample Geomean commonplace for E. coli

Nine Eagles Beach

• Beach classification: Vulnerable
• Last check date: Aug. 12
• Test outcomes: Exceeded five-sample Geomean commonplace for E. coli

Orleans City Beach

• Beach classification: Les weak
• Last check date: Aug. 12
• Test outcomes: Exceeded algal toxin motion degree

Pleasant Creek Beach

• Beach classification: Less weak
• Last check date: Aug. 12
• Test outcomes: Exceeded five-sample Geomean commonplace for E. coli

Prairie Rose Beach

• Beach classification: Vulnerable
• Last check date: Aug. 11
• Test outcomes: Exceeded single-sample restrict and five-sample Geomean commonplace for E. coli

Union Grove Beach

• Beach classification: Vulnerable
• Last check date: Aug. 12
• Test outcomes: Exceeded single-sample restrict and five-sample Geomean commonplace for E. coli

What different seashores are usually not advisable for swimming?

The Iowa DNR additionally tracks experiences for 39 metropolis or county seashores throughout the state. This week, 15 of the seashores reported E.coli ranges above the single-sample restrict.

Hickory Grove Park Beach in Story County was the one seaside in Dallas, Polk or Story counties to report excessive ranges.

Lake Red Rock, which is managed by the U.S. Army Corps of Engineers, reported excessive bacterial ranges and doesn’t advocate swimming on the lake’s North Overlook Beach or Whitebreast Beach.

Which Iowa seashores have improved to ‘OK for swimming’?

Three seashores listed as “swimming not recommended” on the Aug. 7 report have now improved and are thought-about “OK to swim”:

• Big Creek Beach
• Bobwhite State Park
• Denison Beach

Which Iowa seashores have particular statuses?

• Blue Lake Beach: While Lewis and Clark State Park has reopened, the seaside at Blue Lake Beach stays closed as a result of low water ranges. DNR is just not conducting testing whereas the seaside is closed.
• Brushy Creek Beach: Monitoring is presently suspended as a result of building.
• Lake Keomah: Monitoring by DNR is presently suspended as a result of low lake water circumstances. The DNR drained the lake in July 2024 for a serious renovation and water high quality enchancment venture that was set to final via spring 2026. The DNR warns folks to remain out of the lake mattress, which could look dry, however is smooth and will rapidly entrap folks.

How does the Iowa DNR classify Iowa’s seashores primarily based on their water high quality?

DNR officers classify state park seashores into one in all three classes yearly primarily based on their historical past of micro organism outcomes in recent times:

• Vulnerable: Beaches are thought-about weak when the geometric imply commonplace is exceeded in three or extra of the 5 most up-to-date sampling seasons.
• Transitional: The seaside’s geometric imply commonplace is exceeded in two or fewer sampling seasons of the 5 most up-to-date years of monitoring and was listed as “vulnerable” previously monitoring seasons.
• Less weak: The seaside’s geometric imply commonplace is exceeded in two or fewer sampling seasons of the 5 most up-to-date years of monitoring and was listed as “transitional” or “less vulnerable” in previous monitoring seasons.

Brian Smith is a senior editor and viewers strategist for the Des Moines Register. Reach him at bsmith@dmreg.com.