Plymouth, August 23, 2025
News Summary
Nebraska has issued a health alert for harmful algal blooms at Cub Creek Lake due to elevated toxin levels. The alert warns of high microcystin levels, exceeding the safety threshold for recreational waters. Visitors are advised to avoid water exposure, especially with pets. Other lakes under high alert include Maskenthine Reservoir and Kirkman’s Cove Lake, while Bluestem Lake has lifted its warning status. Weekly monitoring efforts continue to track algae conditions across the state.
Lincoln, Nebraska – The state of Nebraska has issued a health alert for Harmful Algal Blooms (HAB) at Cub Creek Lake near Plymouth in Jefferson County due to elevated toxin levels. This alert comes after water sampling showed microcystin levels exceeding eight parts per billion (ppb), which is above the safety threshold for recreational waters. Meanwhile, Bluestem Lake in Lancaster County has been removed from alert status after being under warning the previous week.
The toxin microcystin, released by specific strains of blue-green algae (HAB), poses health risks to both humans and animals. Signs are currently posted at Cub Creek Lake, advising visitors to exercise caution. Recreational activities such as boating and fishing remain permitted at lakes under health alerts, but public advisories strongly recommend avoiding any water exposure. Additionally, pets should not enter the affected waters or drink from them, as exposure can lead to serious health consequences, including skin rashes and diarrhea.
In total, three lakes are currently under high alert: Cub Creek Lake, Maskenthine Reservoir in Stanton County, and Kirkman’s Cove Lake in Richardson County. It’s essential for the public to remain aware of conditions in and around these lakes, especially since harmful algal blooms can develop rapidly between sampling and reporting periods. The Nebraska Department of Water, Energy, and Environment (DWEE) highlights that water that appears discolored or suspicious should be avoided.
Ongoing monitoring efforts involve weekly sampling of 56 public lake sites across Nebraska, starting from the first week in May and continuing through the end of September. Results of water samples for HAB and bacteria testing are updated every Friday on the DWEE website. The department has also introduced an interactive Beach Watch map that allows residents and visitors to visualize currently affected lakes across the state.
While designated swimming beaches at these lakes are closed during health alerts, public areas near the lakes remain open for camping, picnics, and various outdoor activities. It’s important for families and individuals visiting these sites to stay informed about water conditions to ensure their safety and the safety of their pets.
Research indicates that monitoring for harmful algal blooms is conducted at knee-level depth to reflect potential toxin levels in shallow areas, where exposure risk is heightened. Wind direction can also play a significant role in algae accumulation, leading to worsening conditions along beaches.
The DWEE provides resources for the public to recognize harmful algal blooms and understand necessary health precautions, including a HAB Fact Sheet which is available online.
What You Need To Know
- Health alert issued for Cub Creek Lake due to high microcystin levels.
- Previous alerts at Bluestem Lake lifted.
- Other lakes under high alert include Maskenthine Reservoir and Kirkman’s Cove Lake.
- Swimming is prohibited; boating and fishing are allowed with advisories.
- Weekly monitoring of 56 lakes from May to September.
Frequently Asked Questions
What are Harmful Algal Blooms?
Harmful Algal Blooms (HAB) are overgrowths of algae in water bodies that pose health risks due to the toxins they produce, such as microcystin.
How can one protect themselves from exposure to HABs?
To avoid exposure, do not swim in lakes with alerts; avoid swallowing water; and keep pets away from these waters.
Where can I find updated information on water quality and health alerts?
Weekly results and alerts are updated on the Nebraska Department of Water, Energy, and Environment (DWEE) website.
Summary of Key Features
| Feature | Details |
|---|---|
| Health Alert | Cub Creek Lake in Jefferson County |
| Removed Alerts | Bluestem Lake, Lancaster County |
| Microcystin Levels | Above 8 ppb at Cub Creek and Glenn Cunningham Lake |
| Swimming Status | Designated beaches closed during alerts |
| Monitoring Period | Weekly sampling from May to September |
Deeper Dive: News & Info About This Topic
HERE Resources
Additional Resources
- 1011 Now: Health Alert Issued for Multiple Nebraska Lakes
- Wikipedia: Harmful Algal Bloom
- News Channel Nebraska: Health Alert Issued for Bluestem Lake
- Google Search: Harmful Algal Blooms
- Rural Radio: Health Alert Issued for Multiple Lakes
- Google Scholar: Harmful Algal Blooms Health Risks
- KLKN TV: Harmful Algal Blooms Reported in Three Nebraska Lakes
- Encyclopedia Britannica: Algal Bloom
- 1011 Now: Nebraska Launches Interactive Map for Toxic Algae
- Google News: Toxic Algae Nebraska
Author: STAFF HERE PLYMOUTH WRITER
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