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Re-check lakes when the record moves

State integrated reports update on multi-year assessment cycles; linked USGS gauges publish new daily readings. Save waterbodies here, note when you last looked, and come back after the next EPA ATTAINS or USGS extract refresh, not because we email you.

Compiled by PlainLakes

Reporting cycles 1987–2026
ATTAINS extract vintage: Trailing 365 days, through 2026-08-16
USGS NWIS vintage: Local
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Not an alert service. PlainLakes does not push notifications or predict safety. Assessment verdicts are cycle-based filing decisions; gauge charts show federal observations, not recreation advice. Re-check after source updates or when your question changes, typically every 6–12 months for assessment cycles on lakes you care about, or sooner if you are watching a linked level series through a wet or dry season.

Saved lakes

Due for re-check (180d+)

Data on this site reflects extract vintage 2026-08-17 (ATTAINS Reporting cycles 1987–2026; USGS Trailing 365 days, through 2026-08-16). Clearing browser storage removes your list.

Watchlist entries are stored only in your browser. Record pages render live EPA ATTAINS and USGS NWIS values at request time, no number is typed in by an editor. Re-check dates are your own notes; they do not sync across devices. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-08-17.