Matanzas Inlet Water Quality
St. Johns County, Florida
Good
The latest test found low bacteria levels (35 or fewer per 100 mL).
- Latest test
- Oct 27, 2026 (9 days ago)
- Enterococci
- 20 per 100 mL
- Past 12 months
- 20 of 20 tests Good
Results over time
Recent tests
| Date | Enterococci per 100 mL | Rating |
|---|---|---|
| Oct 27, 2026 | 20 | Good |
| Oct 13, 2026 | <10 | Good |
| Oct 6, 2026 | 12 | Good |
| Sep 29, 2026 | <10 | Good |
| Sep 22, 2026 | <10 | Good |
| Sep 15, 2026 | <10 | Good |
| Sep 9, 2026 | 16 | Good |
| Sep 1, 2026 | <10 | Good |
| Aug 26, 2026 | 16 | Good |
| Aug 19, 2026 | <10 | Good |
| Aug 12, 2026 | <10 | Good |
| Aug 5, 2026 | <10 | Good |
| Jul 28, 2026 | <10 | Good |
| Jul 21, 2026 | 24 | Good |
| Jul 14, 2026 | 12 | Good |
| Jun 23, 2026 | <10 | Good |
The long view
The state has 538 tests on record for Matanzas Inlet over 27 years, starting August 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
- Crescent BeachSt. Johns County · Tested Oct 20 · 12 per 100 mL · 3.7 miGood
- Marineland BeachFlagler County · Tested Nov 2 · 10 per 100 mL · 3.8 miGood
- Frank B Butler Park - EastSt. Johns County · Tested Oct 27 · 16 per 100 mL · 5.0 miGood
- Washington Oaks BeachFlagler County · Tested Nov 2 · 10 per 100 mL · 6.0 miGood
- St. Augustine Beach - Ocean TraceSt. Johns County · Tested Dec 16, 2025 · 28 per 100 mL · 7.4 miNo recent test
- Malacompra ParkFlagler County · Tested Nov 2 · 10 per 100 mL · 7.5 miGood
About this site
Sampling site MATANZAS INLET (St. Johns County, EPA beach ID FL446186), at 29.71848, -81.23102. 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.