South End Bridge Water Quality

Nassau County, Florida

Good

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

Latest test
Oct 7, 2026 (29 days ago)
Enterococci
<10 per 100 mL
Past 12 months
20 of 20 tests Good

Results over time

101001000Mar 18, 2026: <10 per 100 mL (Good)Mar 25, 2026: 12 per 100 mL (Good)Apr 1, 2026: 12 per 100 mL (Good)Apr 7, 2026: <10 per 100 mL (Good)Apr 15, 2026: 12 per 100 mL (Good)Apr 22, 2026: 16 per 100 mL (Good)Apr 29, 2026: <10 per 100 mL (Good)May 6, 2026: <10 per 100 mL (Good)May 11, 2026: <10 per 100 mL (Good)May 20, 2026: <10 per 100 mL (Good)Jun 3, 2026: 16 per 100 mL (Good)Jun 8, 2026: <10 per 100 mL (Good)Jun 17, 2026: 12 per 100 mL (Good)Jul 15, 2026: 16 per 100 mL (Good)Jul 29, 2026: 12 per 100 mL (Good)Aug 12, 2026: 12 per 100 mL (Good)Aug 26, 2026: <10 per 100 mL (Good)Sep 9, 2026: 20 per 100 mL (Good)Sep 23, 2026: <10 per 100 mL (Good)Oct 7, 2026: <10 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 7, 2026<10Good
Sep 23, 2026<10Good
Sep 9, 202620Good
Aug 26, 2026<10Good
Aug 12, 202612Good
Jul 29, 202612Good
Jul 15, 202616Good
Jun 17, 202612Good
Jun 8, 2026<10Good
Jun 3, 202616Good
May 20, 2026<10Good
May 11, 2026<10Good
May 6, 2026<10Good
Apr 29, 2026<10Good
Apr 22, 202616Good
Apr 15, 202612Good

The long view

The state has 537 tests on record for South End Bridge over 27 years, starting July 2000. In the last 10 years, 0 tests of 20 (0%) came back Poor, below 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 SOUTH END BRIDGE (Nassau County, EPA beach ID FL442454), at 30.52197, -81.44460. 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.