Baltimore · H2O Quality
Monday, September 7
Enterococcus is a bacteria used by the EPA to measure recreational water safety. Levels are reported as Colony Forming Units per 100 milliliters (CFU/100mL). Below 35 — generally safe for swimming. 35 to 104 — elevated bacteria, swim at your own risk. Above 104 — unsuitable for swimming or direct contact.
Water Quality
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Geometric Mean
—CFU
Enterococcus per 100 mL · across 0 monitored sites
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2026 Water Quality Monitoring Map
Bacteria levels (Enterococcus CFU/100mL) based on EPA recreational water criteria. Sampling and reporting by Blue Water Baltimore and the Baltimore Harbor Waterkeeper. Updated weekly during swim season.