E. coli Data

Bi-Weekly E. coli Report

E. coli data is updated weekly by the Lilly Center’s research team. We sample 14 streams every other week, all year round, and 7 beaches during the summer. You can learn more about E. coli by visiting these educational resources:

Weekly Results: Streams

The EPA’s safety threshold is 235 CFU/100 mL

ND – None Detected

– – –  Data unavailable for this sampling week 

Testing SiteDate Last SampledCFU/100 mL
Winona Lake Inflow: Peterson Ditch10/7/20252,500
Winona Lake Inflow: Keefer-Evans10/7/20252,500
Winona Lake Inflow: Cherry Creek10/7/20252,500
Winona Lake Outflow: Eagle Creek10/7/202586.2
Pike Lake Inflow: Deeds Creek10/7/2025488.4
Pike Lake Outflow: Lones Ditch10/7/202560.9
Tippy Chain Inflow: Grassy Creek9/18/20254.1
Tippy Chain Inflow: Tippecanoe River9/18/2025285.1
Tippy Chain Outflow: Tippecanoe River9/18/202517.5
Wawasee-Syracuse Inflow: Papakeechie10/1/202521.6
Wawasee-Syracuse Inflow: Turkey Creek10/1/2025204.6
Wawsee-Syracuse: Inflow: Dillon Creek10/1/20251,732.9
Wawsee-Syracuse Inflow: Launer's Creek10/1/202579.4
Wawasee-Syracuse Outflow: Turkey Creek10/1/2025613.1

Weekly Results: Beaches

The EPA’s safety threshold is 235 CFU/100 mL

ND – None Detected

– – –  Data unavailable for this sampling week 

Beach sampling resumes May, 2026.

How does the Lilly Center test for E. coli?

The field research team collects water samples in sterile jars from streams and beaches. They use a gloved hand and a pole to collect the sample from upstream of where they are standing to avoid contamination from other sources. These samples are kept in a cooler to prevent the quantity of E. coli from changing while it is transported back to the Lilly Center’s research lab.

Matt Burlingame

Matt Burlingame

Assistant Director of Research

burlinmn@grace.edu 574-372-5287

Bio

Full data reports are available by contacting the Lilly Center’s assistant director of research, Matt Burlingame.