Sheridan Bay Park is a Great Lakes beach in Chautauqua County, New York. Across 21 bacteria samples collected between 2021 and 2023 at nearby monitoring stations, it earns a Beach Safety Grade of D — Poor.
About 14% of samples at Sheridan Bay Park exceeded the EPA Beach Action Value of 235 CFU/100 mL for Escherichia coli — the threshold at which water managers typically post a swimming advisory. In practice that means the safe-swimming limit was frequently crossed here over the monitored period. Bacteria samples frequently exceed the safe-swimming threshold; swimming advisories are common here.
Read this grade as directional rather than settled: it draws on a single monitoring station, rests on only 21 samples and has no results reported since 2023. That is enough to classify how the water has behaved, but not enough to separate this beach from another a grade away — a beach graded from thousands of samples at several stations is a firmer read. As more results are reported, the grade may shift.
Sheridan Bay Park is currently listed as inactive in the EPA beach-monitoring program, so it may no longer be routinely sampled. Its grade reflects the water-quality results collected while it was active — useful history, but confirm the beach's current status and any local advisory before you visit.