Observed arrival · 2026-10-25
Is the Lake Safe?
A lake-by-lake guide to toxic algae reports, bloom history, and safety context for 1,142 lakes across five states.
○Open
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$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Swimmers, lake visitors, and dog owners
- Worth noticing
- It warns that many lakes are tested only intermittently, so the absence of a report is not evidence that the water is safe.
Field notes
Lake entries combine the latest state record with historical bloom years and, according to the site's description, typical bloom months. Coverage is uneven: the homepage lists 322 California lakes and 352 New York lakes, while the displayed data dates for those states are earlier than Kansas's. The site identifies itself as independent and cautions visitors to follow posted signs and local health officials.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
◉HumanPersonal, local, civic, or handmade
One card from the complete issue