Harry Harris County Park is a saltwater beach in Monroe County, Florida. Across 242 bacteria samples collected between 2021 and 2025 at nearby monitoring stations, it earns a Beach Safety Grade of B — Good.
About 5% of samples at Harry Harris County Park exceeded the EPA Beach Action Value of 104 CFU/100 mL for Enterococcus — the threshold at which water managers typically post a swimming advisory. In practice that means the safe-swimming limit was sometimes crossed here over the monitored period. Bacteria samples rarely exceed the safe-swimming threshold.
Read this grade as directional rather than settled: it draws on a single monitoring station. 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.
In the most recent full reporting year, Harry Harris County Park was under a swimming advisory for about 4% of its monitored beach days — a useful gauge of how often problems recur here beyond any single sample.