Coco Plum Beach Water Quality

Monroe County, Florida

Good

The latest test found low bacteria levels (35 or fewer per 100 mL).

Latest test
Oct 20, 2026 (16 days ago)
Enterococci
31 per 100 mL
Past 12 months
16 of 20 tests Good, 4 Poor

Results over time

101001000Jan 27, 2026: 10 per 100 mL (Good)Feb 10, 2026: <10 per 100 mL (Good)Feb 24, 2026: 10 per 100 mL (Good)Mar 10, 2026: 10 per 100 mL (Good)Mar 24, 2026: 30 per 100 mL (Good)Apr 7, 2026: <10 per 100 mL (Good)Apr 21, 2026: 10 per 100 mL (Good)May 5, 2026: <10 per 100 mL (Good)May 19, 2026: 109 per 100 mL (Poor)Jun 2, 2026: 459 per 100 mL (Poor)Jun 16, 2026: <10 per 100 mL (Good)Jun 30, 2026: <10 per 100 mL (Good)Jul 14, 2026: 10 per 100 mL (Good)Jul 28, 2026: <10 per 100 mL (Good)Aug 11, 2026: 158 per 100 mL (Poor)Aug 25, 2026: <10 per 100 mL (Good)Sep 8, 2026: <10 per 100 mL (Good)Sep 22, 2026: 109 per 100 mL (Poor)Oct 6, 2026: <10 per 100 mL (Good)Oct 20, 2026: 31 per 100 mL (Good)
Enterococci per 100 mL, log scale. Lines mark the Moderate (36) and Poor (71) levels.

Recent tests

DateEnterococci per 100 mLRating
Oct 20, 202631Good
Oct 6, 2026<10Good
Sep 22, 2026109Poor Advisory
Sep 8, 2026<10Good
Aug 25, 2026<10Good
Aug 11, 2026158Poor Advisory
Jul 28, 2026<10Good
Jul 14, 202610Good
Jun 30, 2026<10Good
Jun 16, 2026<10Good
Jun 2, 2026459Poor Advisory
May 19, 2026109Poor Advisory
May 5, 2026<10Good
Apr 21, 202610Good
Apr 7, 2026<10Good
Mar 24, 202630Good

The long view

The state has 546 tests on record for Coco Plum Beach over 27 years, starting August 2000. In the last 10 years, 4 tests of 20 (20%) came back Poor, well above the rate for all Florida sampled beaches (6.1%). Bacteria levels usually jump after heavy rain, when stormwater washes to the shore, and drop again within a day or two.

Nearby sampled beaches

About this site

Sampling site COCO PLUM BEACH (Monroe County, EPA beach ID FL658167), at 24.72972, -81.00139. Results are from the Florida Department of Health's Healthy Beaches Program; years before 2026 come from the state's submissions to EPA's Water Quality Portal.