Microcystin Data

Weekly microcystin toxin report

Summer 2022 sampling is complete! Sampling will resume in 2023

If you already signed up for our microcystin toxin update emails, thank you! We’ll send reports to your inbox June-August. If you haven’t, what are you waiting for? They will remind you to check this page to see which lakes have microcystin detected, and at what levels.

Supported by the K21 Health Foundation, we sample 14 lakes and seven public beaches every week from June-August, and 12 streams biweekly year-round. Visit these excellent and educational resources to learn more about blue-green algae:

WEEK 10 RESULTS: August 12

IDEM’s safety threshold is 8.0 ppb for humans and 0.8 ppb for pets.

ND – None Detected

– – –  Data unavailable for this sampling week 

LakesConcentration (ppb)
Beaver Dam LakeND
Yellow Creek LakeND
Winona LakeND
Center LakeND
Pike Lake0.310
Big Chapman Lake0.544
Big Barbee LakeND
Webster LakeND
Lake TippecanoeND
James LakeND
Oswego LakeND
Dewart Lake0.940
Lake WawaseeND
Syracuse Lake0.211
BeachConcentration (ppb)
Center Lake BeachND
Pike Lake BeachND
Syracuse Lake Beach - Community Center0.268
Syracuse Lake Beach - Hoy0.274
Waubee Lake BeachND
Webster Lake Beach0.211
Winona Lake BeachND

What's next?

Every October, we publish Beneath the Surface, a report on our summer research as compared to the two previous years.

The 2021 edition includes a spread dedicated to blue-green algae (and microcystin) analysis! If you’re curious about what we learned over the course of the summer, make sure to grab a digital copy.

Why & how the Lilly Center samples for microcystin

From June-August, the Lilly Center collects water samples from open water on Kosciusko County’s 12 all-sport lakes and Center and Pike lakes, along with public swimming beaches at these lakes:

  • Center
  • Pike
  • Syracuse
  • Waubee
  • Webster
  • Winona

Samples are processed and analyzed for microcystin, a toxin produced by blue-green algae. If ingested or left on the skin for too long, microcystin can cause health problems for people and pets. It’s especially dangerous for animals, like dogs.

Toxin results are updated on this page every week during the summer. To learn more about microcystin and pet and human health, visit our blue-green algae research hub!

As a general guideline, don’t recreate in water that has a blue-green algae bloom! Blooms often look like a green paint slick on the surface or a pea-soup appearance. If you see a bloom (or aren’t sure if it’s a bloom) email us the date, time, location and a picture and a team member will follow up with you.

Additional sampling on Lake Wawasee

Thanks to the support of two generous Lake Wawasee families, the Lilly Center sampled seven additional sites on Lake Wawasee during the summer of 2021. All water samples from these sites were tested for microcystin.

IDEM’s safety threshold is 8.0 ppb for humans and 0.8 ppb for pets.

ND – None Detected

– – –  Data unavailable for this sampling week

LetterNameConcentration
ADeepest PointND
BNorth Shore0.231
CConklin Bay0.256
DSouth Shore0.191
ESandbar0.286
FJohnson Bay0.314
GJarrett's Bay0.439
HCrow Bay0.286

Discover more in Beneath the Surface 2021!

Collaboration with IDEM

Lilly Center algae sampling and analysis are coordinated with the Indiana Department of Environmental Management (IDEM) to ensure statewide data comparison and accuracy.

Visit IDEM's website