Back to Key Largo (Pennekamp)'s live score
Key Largo (Pennekamp) water quality today
Official bacteria testing, in plain words.
WATER QUALITY RIGHT NOW
Poor
Latest test: poor (999 cfu/100mL).
Sampled Sep 8 · FL DOH Healthy Beaches, conditions may have changed since
What this means for swimming
Enterococci is the indicator bacteria official beach programs test for, typically every week or two. Under 35 per 100 mL is the all-clear band; 71 and above usually triggers a swim advisory. Counts move week to week, and heavy rain can spike them for a day or two as runoff drains.
Today's reading is in advisory territory. That does not close the beach: the sand and the walk are unaffected, but swimming is a bad idea, especially with cuts, scrapes, or a weaker immune system. The posted signs at the beach itself are the official word.
ShoreScore folds this reading into Key Largo (Pennekamp)'s overall 0-100 score alongside live weather, surf, UV, seaweed reports, and storm radar, so one number tells you whether it's worth the trip.
Recent tests
8 of the last 10 official tests landed in the all-clear band. Shown oldest to newest.
Water quality at nearby beaches
Harry Harris Park (Key Largo South)Islamorada (Anne’s Beach)Cape Florida / Bill BaggsKey Biscayne / Crandon ParkVirginia KeyAll beaches
Also for Key Largo (Pennekamp): today's seaweed and sargassum report
Source: Florida Department of Health Healthy Beaches sampling, checked daily. Informational only: posted signs and lifeguard guidance at the beach are the official word.