Monroe County·Florida Keys·Atlantic Coast
Sombrero Beach water quality history
This page gives swimmers deeper historical context for Sombrero Beach: recent readings, spike frequency, and how often the displayed station history has reached poor territory.
Current picture
GOOD on the latest sample at 10 CFU/100mL.
Recent-sample context
0 poor samples and 2 non-good samples in the displayed history.
Rain still matters
Stormwater can make this page stale faster than the normal testing schedule, especially after heavy rain.
Poor samples shown
0
out of 12 displayed samples.
Latest poor sample
No poor sample in the displayed history
This is the last time the displayed history shows a poor result.
Displayed-sample risk
0%
share of poor samples in the displayed history.
Water Quality History — Latest Samples
Sample source: Sombrero Beach
Values in CFU/100mL. Green = Good (≤35.4), Yellow = Moderate (35.5–70.4), Red = Poor (≥70.5)
Nearby Beaches With Lower Risk
Nearby alternatives →Matheson Hammock Beach
Miami-Dade County · Atlantic Coast · 85 mi away
Nearby-station context from KEY BISCAYNE BEACH, about 7.0 mi away; not an exact-beach sample.
Nearby-station data · No poor samples in the displayed history · risk 0%
Marco Island Beach
Collier County · Gulf Coast · 95 mi away
No poor samples in the displayed history · risk 0%
South Beach
Miami-Dade County · Atlantic Coast · 95 mi away
Last poor sample Aug 3 · risk 8%
Bahia Honda State Park
Monroe County · Atlantic Coast · 12 mi away
Last poor sample Sep 22 · risk 8%
Virginia Key Beach
Miami-Dade County · Atlantic Coast · 92 mi away
Last poor sample Sep 23 · risk 25%
Key West Beach
Monroe County · Atlantic Coast · 46 mi away
Nearby-station context from SOUTH BEACH, about 0.3 mi away; not an exact-beach sample.
Nearby-station data · Last poor sample Sep 22 · risk 33%
Recent Warning-Sign Samples
Full history →September 8, 2026
52 CFU/100mL · MODERATE
June 2, 2026
41 CFU/100mL · MODERATE
Keep Exploring Nearby
How To Use This Page
This page gives swimmers deeper historical context for Sombrero Beach: recent readings, spike frequency, and how often the displayed station history has reached poor territory.
Use this view as a decision aid, not a guarantee. The latest sample, visible runoff, and recent weather still matter more than any single list or chart.
If you want the main same-day answer instead, go back to the Sombrero Beach beach page.
Data from FL DOH Healthy Beaches Program. This is an independent project, not official real-time clearance — check with Florida DOH for official conditions.