Observations

Testers upload observations each time they test at a location. Each individual observation report shows you the measurements taken on a specific day at a specific location. What's this?

66,079 observations

+791 new observations added in the past 30 days

Black Bass Bay : Mississippi Lake

Ontario, Canada

Observed by
Peter KleinBeernink
Tue, 20 May 2025 09:30:00 -0400

Gallions Lake : Gallions Lake

London, Greenwich, United Kingdom

Observed by
Lucy Hutchison
Tue, 20 May 2025 09:45:00 +0100

Gallions Lake 1 : Gallions Lake 1

London, Greenwich, United Kingdom

Observed by
Lucy Hutchison
Tue, 20 May 2025 09:00:00 +0100

Blackberry Creek Hannaford Woods FP : Blackberry Creek at Hannaford Woods FP

Sugar Grove, Illinois, United States

Observed by
Jenna Heller
Mon, 19 May 2025 19:30:00 -0500

River Bend Forest Preserve site : Sangamon River

Mahomet, Illinois, United States

Observed by
Bruce M Colravy
Mon, 19 May 2025 16:46:00 -0500

East Davignon Creek Allens Side (N of 2nd Ln W) : East Davignon Creek

Ontario, Canada

Observed by
Community Volunteers
Mon, 19 May 2025 14:45:00 -0400

St. Andrews on the Hill (SAC) : Tannery Creek

Aurora, Ontario, Canada

Observed by
Ian Xiong
Mon, 19 May 2025 14:06:00 -0400

Big Carp River Herkimer Rd : Big Carp River

Ontario, Canada

Observed by
Community Volunteers
Mon, 19 May 2025 14:05:00 -0400

Little Carp River Carpin Beach Rd : Little Carp River

Ontario, Canada

Observed by
Community Volunteers
Mon, 19 May 2025 13:45:00 -0400

St Lawrence river : St Lawrence river

Ontario, Canada

Observed by
Jacob Gadbois
Mon, 19 May 2025 17:31:00 +0000

East Holland River at Aurora Community Arboretum (AFLC) : Lake Simcoe

Aurora, Ontario, Canada

Observed by
Ian Xiong
Mon, 19 May 2025 13:30:00 -0400

West Davignon Brookfield Ave : West Davignon Creek

Ontario, Canada

Observed by
Community Volunteers
Mon, 19 May 2025 13:20:00 -0400

Thunderbird Trail Crossing of Kline Creek : Kline Creek

Carol Stream, Illinois, United States

Observed by
David Bohnsack
Mon, 19 May 2025 11:29:00 -0500

Gros Cap - Lake Superior : Lake Superior

Ontario, Canada

Observed by
Community Volunteers
Mon, 19 May 2025 12:25:00 -0400

Lies Road Crossing of Kline Creek : Kline Creek

Carol Stream, Illinois, United States

Observed by
David Bohnsack
Mon, 19 May 2025 11:20:00 -0500

Otter Creek : Otter Creek

Elgin, Illinois, United States

Observed by
Gary Swick
Mon, 19 May 2025 08:40:00 -0500

Inflow to East Lagoon at Montgomery to Faraday pedestrian bridge : Inflow to East Lagoon

Dekalb, Illinois, United States

Observed by
WILLIAM MARTIN
Mon, 19 May 2025 07:50:00 -0500

South Branch Kishwaukee River at College Ave. : South Branch Kishwaukee River

Dekalb, Illinois, United States

Observed by
WILLIAM MARTIN
Mon, 19 May 2025 07:50:00 -0500

Bartons Mill : River Loddon

Basingstoke, Hampshire, United Kingdom

Observed by
Gillian Moore
Mon, 19 May 2025 11:12:00 +0100

St. Joseph's Creek @ 59th & Williams Street : St. Joseph's Creek

Downers Grove, Illinois, United States

Observed by
Jon Yeater
Mon, 19 May 2025 02:40:00 -0500