Founder 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
<10 per 100 mL
Past 12 months
18 of 23 tests Good, 4 Poor

Results over time

101001000Nov 9, 2021: 10 per 100 mL (Good)Nov 23, 2021: 31 per 100 mL (Good)Dec 8, 2021: 10 per 100 mL (Good)Dec 21, 2021: 20 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: 31 per 100 mL (Good)Mar 1, 2022: 75 per 100 mL (Poor)Mar 15, 2022: 124 per 100 mL (Poor)Mar 29, 2022: 10 per 100 mL (Good)Apr 12, 2022: 10 per 100 mL (Good)Apr 26, 2022: 10 per 100 mL (Good)May 10, 2022: 10 per 100 mL (Good)May 24, 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: 110 per 100 mL (Poor)Nov 21, 2022: 64 per 100 mL (Moderate)Dec 6, 2022: 10 per 100 mL (Good)Dec 20, 2022: 689 per 100 mL (Poor)Jan 3, 2023: 10 per 100 mL (Good)Jan 17, 2023: 10 per 100 mL (Good)Jan 31, 2023: 10 per 100 mL (Good)Feb 14, 2023: 20 per 100 mL (Good)Feb 28, 2023: 21 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: 10 per 100 mL (Good)Aug 29, 2023: 10 per 100 mL (Good)Sep 12, 2023: 99 per 100 mL (Poor)Sep 26, 2023: 10 per 100 mL (Good)Oct 10, 2023: 31 per 100 mL (Good)Oct 24, 2023: 10 per 100 mL (Good)Nov 7, 2023: 10 per 100 mL (Good)Nov 21, 2023: 20 per 100 mL (Good)Dec 5, 2023: 10 per 100 mL (Good)Dec 19, 2023: 10 per 100 mL (Good)Jan 3, 2024: 53 per 100 mL (Moderate)Jan 16, 2024: 10 per 100 mL (Good)Jan 30, 2024: 10 per 100 mL (Good)Feb 13, 2024: 697 per 100 mL (Poor)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: 124 per 100 mL (Poor)Jun 4, 2024: 10 per 100 mL (Good)Jun 19, 2024: 75 per 100 mL (Poor)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: 10 per 100 mL (Good)Sep 24, 2024: 10 per 100 mL (Good)Oct 15, 2024: 20 per 100 mL (Good)Oct 22, 2024: 10 per 100 mL (Good)Nov 5, 2024: 42 per 100 mL (Moderate)Nov 19, 2024: 10 per 100 mL (Good)Dec 3, 2024: 10 per 100 mL (Good)Dec 17, 2024: 31 per 100 mL (Good)Jan 2, 2025: 31 per 100 mL (Good)Jan 14, 2025: 10 per 100 mL (Good)Jan 28, 2025: 10 per 100 mL (Good)Feb 11, 2025: 10 per 100 mL (Good)Feb 24, 2025: 10 per 100 mL (Good)Mar 11, 2025: 20 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: 146 per 100 mL (Poor)Jun 17, 2025: 10 per 100 mL (Good)Jul 1, 2025: 20 per 100 mL (Good)Jul 15, 2025: 52 per 100 mL (Moderate)Jul 29, 2025: 10 per 100 mL (Good)Aug 12, 2025: 20 per 100 mL (Good)Aug 26, 2025: 10 per 100 mL (Good)Sep 9, 2025: 10 per 100 mL (Good)Sep 23, 2025: 20 per 100 mL (Good)Oct 7, 2025: 10 per 100 mL (Good)Oct 21, 2025: 52 per 100 mL (Moderate)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: <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: <10 per 100 mL (Good)Apr 7, 2026: 41 per 100 mL (Moderate)Apr 21, 2026: <10 per 100 mL (Good)May 5, 2026: 96 per 100 mL (Poor)May 19, 2026: <10 per 100 mL (Good)Jun 2, 2026: <10 per 100 mL (Good)Jun 16, 2026: <10 per 100 mL (Good)Jun 30, 2026: <10 per 100 mL (Good)Jul 14, 2026: 109 per 100 mL (Poor)Jul 28, 2026: 185 per 100 mL (Poor)Aug 11, 2026: <10 per 100 mL (Good)Aug 25, 2026: <10 per 100 mL (Good)Sep 8, 2026: 135 per 100 mL (Poor)Sep 22, 2026: 20 per 100 mL (Good)Oct 6, 2026: <10 per 100 mL (Good)Oct 20, 2026: <10 per 100 mL (Good)20222023202420252026
Enterococci per 100 mL, log scale. Lines mark the Moderate (36) and Poor (71) levels.

Recent tests

DateEnterococci per 100 mLRating
Oct 20, 2026<10Good
Oct 6, 2026<10Good
Sep 22, 202620Good
Sep 8, 2026135Poor Advisory
Aug 25, 2026<10Good
Aug 11, 2026<10Good
Jul 28, 2026185Poor Advisory
Jul 14, 2026109Poor
Jun 30, 2026<10Good
Jun 16, 2026<10Good
Jun 2, 2026<10Good
May 19, 2026<10Good
May 5, 202696Poor Advisory
Apr 21, 2026<10Good
Apr 7, 202641Moderate
Mar 24, 2026<10Good

The long view

The state has 872 tests on record for Founder over 25 years, starting August 2002. In the last 10 years, 25 tests of 276 (9%) came back Poor, 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 FOUNDER (Monroe County, EPA beach ID FL687721), at 24.96222, -80.56972. 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.