Harmful algae bloom detected on Bass Lake

September 10, 2026

SUMMIT TOWNSHIP, Mason County — District Health Department #10 and Michigan Department of Environment, Great Lakes, and Energy have confirmed that a reported algae bloom in Bass Lake is harmful.

This is the second time this summer that a harmful algae bloom was detected on Bass Lake.

The harmful algae bloom was confirmed in Bass Lake, Wednesday, Sept. 9. “DHD#10 will continue to monitor the harmful algae bloom and will provide updates to the public when available,” states a press release. 

“Algae blooms can form when there are high nutrient levels within bodies of water along with warm temperatures. Signs will be posted at the public access site of the lake to notify individuals to avoid contact with the water in that area as a precautionary measure.”

 Take the following steps when near waterways:

  • Avoid direct contact with waterways that appear to be scummy or have a green shade to them
  • Do not drink untreated surface water
  • Obey posted signage for public health advisories and/or beach closings
  • Limit or avoid eating fish from algal bloom impacted areas

Contact with algae blooms can cause minor illness in humans but can be fatal to pets. It is recommended that people keep their pets out of water that shows any signs of algae blooms.

 People and pets can experience the following symptoms after exposure to algae blooms:

  • Rash, hives, or skin blisters at the contact site
  • Runny eyes and/or nose, sore throat, asthma-like symptoms, or allergic reactions
  • Diarrhea, vomiting, abdominal pain, weakness, tingly fingers, numbness, dizziness, difficulty breathing, or even death resulting from ingesting contaminated water

If you think that you or your pet has been exposed to algae blooms, take the following precautions:

  • Immediately remove yourself and/or your pet from the area
  • Take a shower and thoroughly rinse off pets with clean, fresh water if they swam in an area with algae blooms to avoid potential toxic ingestion from licking between paws or affected areas
  • Seek medical treatment for yourself and/or veterinary treatment for your pet as soon as possible if you think you or your pet may have been exposed to or ingested algal toxins

If you would like to learn more about algae blooms, EGLE has more information on what algae blooms are, where they are located, and frequently asked questions here: https://www.michigan.gov/egle/about/organization/water-resources/glwarm/harmful-algal-blooms.

______________________________________

Please Support Local News Coverage

For generations, local newspapers were supported by subscriptions. Today, while Mason County Press and Oceana County Press remain free to everyone, the cost of producing quality local journalism continues to rise.

If you value independent local news coverage, we invite you to help sustain it by subscribing to the MCP/OCP Daily Briefing for $12 a month — about 40 cents a day — or $120 a year.

Your subscription helps support the reporters, photographers and editors who cover local government, schools, community events, sports, breaking news and the stories that matter most to Mason and Oceana counties. In return, you’ll receive the MCP/OCP Daily Briefing each morning with the day’s headlines, along with occasional breaking news and special email editions.

Monthly subscriptions are available for $12 per month.
Click here to subscribe monthly.

Annual subscriptions are available for $120 per year. That’s a two month savings!
Click here to subscribe annually.

If you prefer to pay by check, mail your $120 annual payment to:

Media Group 31, LLC
P.O. Box 21
Scottville, MI 49454

Please include your name, mailing address, email address and telephone number so we can activate your subscription.

Subscription payments must be received before service is activated.

Whether you choose to subscribe or continue enjoying our free content, thank you for reading Mason County Press and Oceana County Press. Your readership—and your support—helps ensure that independent local journalism remains available to everyone in our communities.

This story and original photography are copyrighted © 2026 by Media Group 31, LLC, P.O. Box 21, Scottville, MI 49454. All rights reserved. No portion of this story or its images may be reproduced in any form, including print, broadcast or electronic media, without the express written permission of Media Group 31, LLC.

As a news organization, Media Group 31 maintains published content as part of the public and historical record. Accordingly, stories are not removed after publication. At the editor’s discretion, stories may be updated or corrected as new information becomes available. Updates may be made by revising the original story or by publishing a follow-up story. Media Group 31, LLC reserves the right to modify this policy at any time. Please refer to our Use Policy for additional information.

 

Eats & Drinks

Eats & Drinks