Harry Harris County Park 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 20 per 100 mL
Past 12 months 17 of 23 tests Good, 4 Poor
Results over time
10 100 1000 Nov 9, 2021: 10 per 100 mL (Good) Nov 23, 2021: 10 per 100 mL (Good) Dec 8, 2021: 10 per 100 mL (Good) Dec 21, 2021: 10 per 100 mL (Good) Jan 4, 2022: 10 per 100 mL (Good) Jan 18, 2022: 10 per 100 mL (Good) Feb 1, 2022: 10 per 100 mL (Good) Feb 15, 2022: 42 per 100 mL (Moderate) Mar 1, 2022: 124 per 100 mL (Poor) Mar 15, 2022: 150 per 100 mL (Poor) Mar 29, 2022: 10 per 100 mL (Good) Jun 7, 2022: 10 per 100 mL (Good) Jun 21, 2022: 10 per 100 mL (Good) Jul 5, 2022: 10 per 100 mL (Good) Jul 19, 2022: 10 per 100 mL (Good) Aug 2, 2022: 10 per 100 mL (Good) Aug 16, 2022: 10 per 100 mL (Good) Aug 30, 2022: 10 per 100 mL (Good) Sep 13, 2022: 10 per 100 mL (Good) Oct 4, 2022: 10 per 100 mL (Good) Oct 11, 2022: 10 per 100 mL (Good) Oct 25, 2022: 10 per 100 mL (Good) Nov 8, 2022: 10 per 100 mL (Good) Nov 21, 2022: 10 per 100 mL (Good) Dec 6, 2022: 10 per 100 mL (Good) Dec 20, 2022: 129 per 100 mL (Poor) Jan 3, 2023: 10 per 100 mL (Good) Jan 17, 2023: 20 per 100 mL (Good) Jan 31, 2023: 10 per 100 mL (Good) Feb 14, 2023: 10 per 100 mL (Good) Feb 28, 2023: 10 per 100 mL (Good) Mar 14, 2023: 10 per 100 mL (Good) Mar 28, 2023: 10 per 100 mL (Good) Apr 11, 2023: 10 per 100 mL (Good) Apr 25, 2023: 10 per 100 mL (Good) May 9, 2023: 10 per 100 mL (Good) May 23, 2023: 10 per 100 mL (Good) Jun 6, 2023: 10 per 100 mL (Good) Jun 20, 2023: 10 per 100 mL (Good) Jul 5, 2023: 10 per 100 mL (Good) Jul 18, 2023: 10 per 100 mL (Good) Aug 1, 2023: 10 per 100 mL (Good) Aug 15, 2023: 20 per 100 mL (Good) Aug 29, 2023: 10 per 100 mL (Good) Sep 12, 2023: 124 per 100 mL (Poor) Sep 26, 2023: 10 per 100 mL (Good) Oct 10, 2023: 10 per 100 mL (Good) Oct 24, 2023: 10 per 100 mL (Good) Nov 7, 2023: 10 per 100 mL (Good) Nov 21, 2023: 10 per 100 mL (Good) Dec 5, 2023: 10 per 100 mL (Good) Dec 19, 2023: 10 per 100 mL (Good) Jan 3, 2024: 124 per 100 mL (Poor) Jan 16, 2024: 10 per 100 mL (Good) Jan 30, 2024: 10 per 100 mL (Good) Feb 13, 2024: 20 per 100 mL (Good) Feb 27, 2024: 10 per 100 mL (Good) Mar 12, 2024: 10 per 100 mL (Good) Mar 26, 2024: 10 per 100 mL (Good) Apr 9, 2024: 10 per 100 mL (Good) Apr 23, 2024: 10 per 100 mL (Good) May 7, 2024: 10 per 100 mL (Good) May 21, 2024: 10 per 100 mL (Good) Jun 4, 2024: 10 per 100 mL (Good) Jun 19, 2024: 42 per 100 mL (Moderate) Jul 2, 2024: 10 per 100 mL (Good) Jul 16, 2024: 10 per 100 mL (Good) Jul 30, 2024: 10 per 100 mL (Good) Aug 13, 2024: 10 per 100 mL (Good) Aug 26, 2024: 10 per 100 mL (Good) Sep 10, 2024: 20 per 100 mL (Good) Sep 24, 2024: 20 per 100 mL (Good) Oct 15, 2024: 10 per 100 mL (Good) Oct 22, 2024: 10 per 100 mL (Good) Nov 5, 2024: 10 per 100 mL (Good) Nov 19, 2024: 10 per 100 mL (Good) Dec 3, 2024: 10 per 100 mL (Good) Dec 17, 2024: 10 per 100 mL (Good) Jan 2, 2025: 10 per 100 mL (Good) Jan 14, 2025: 10 per 100 mL (Good) Jan 28, 2025: 20 per 100 mL (Good) Feb 11, 2025: 10 per 100 mL (Good) Feb 24, 2025: 10 per 100 mL (Good) Mar 11, 2025: 10 per 100 mL (Good) Mar 25, 2025: 10 per 100 mL (Good) Apr 8, 2025: 10 per 100 mL (Good) Apr 22, 2025: 10 per 100 mL (Good) May 6, 2025: 10 per 100 mL (Good) May 20, 2025: 10 per 100 mL (Good) Jun 4, 2025: 341 per 100 mL (Poor) Jun 17, 2025: 10 per 100 mL (Good) Jul 1, 2025: 10 per 100 mL (Good) Jul 15, 2025: 20 per 100 mL (Good) Jul 29, 2025: 10 per 100 mL (Good) Aug 12, 2025: 10 per 100 mL (Good) Aug 26, 2025: 10 per 100 mL (Good) Sep 9, 2025: 10 per 100 mL (Good) Sep 23, 2025: 10 per 100 mL (Good) Oct 7, 2025: 10 per 100 mL (Good) Oct 21, 2025: 20 per 100 mL (Good) Nov 4, 2025: 10 per 100 mL (Good) Nov 18, 2025: 10 per 100 mL (Good) Dec 2, 2025: 10 per 100 mL (Good) Dec 16, 2025: 10 per 100 mL (Good) Jan 27, 2026: 156 per 100 mL (Poor) Feb 10, 2026: 20 per 100 mL (Good) Feb 24, 2026: <10 per 100 mL (Good) Mar 10, 2026: <10 per 100 mL (Good) Mar 24, 2026: <10 per 100 mL (Good) Apr 7, 2026: 420 per 100 mL (Poor) Apr 21, 2026: <10 per 100 mL (Good) May 5, 2026: 98 per 100 mL (Poor) May 19, 2026: <10 per 100 mL (Good) Jun 2, 2026: 10 per 100 mL (Good) Jun 16, 2026: 148 per 100 mL (Poor) Jun 30, 2026: <10 per 100 mL (Good) Jul 14, 2026: <10 per 100 mL (Good) Jul 28, 2026: 31 per 100 mL (Good) Aug 11, 2026: 31 per 100 mL (Good) Aug 25, 2026: <10 per 100 mL (Good) Sep 8, 2026: 41 per 100 mL (Moderate) Sep 22, 2026: 41 per 100 mL (Moderate) Oct 6, 2026: 10 per 100 mL (Good) Oct 20, 2026: 20 per 100 mL (Good) 2022 2023 2024 2025 2026 Enterococci per 100 mL, log scale. Lines mark the Moderate (36) and Poor (71) levels. Recent tests
Date Enterococci per 100 mL Rating
Oct 20, 2026 20 Good Oct 6, 2026 10 Good Sep 22, 2026 41 Moderate Sep 8, 2026 41 Moderate Aug 25, 2026 <10 Good Aug 11, 2026 31 Good Jul 28, 2026 31 Good Jul 14, 2026 <10 Good Jun 30, 2026 <10 Good Jun 16, 2026 148 Poor Advisory Jun 2, 2026 10 Good May 19, 2026 <10 Good May 5, 2026 98 Poor Advisory Apr 21, 2026 <10 Good Apr 7, 2026 420 Poor Advisory Mar 24, 2026 <10 Good
The long view
The state has 917 tests on record for Harry Harris County Park over 27 years, starting August 2000.
In the last 10 years, 13 tests of 263 (5%) came back Poor, close to 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 HARRY HARRIS COUNTY PARK (Monroe County, EPA beach ID FL955172), at 25.02361, -80.49444. 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.