05/29/2026
CHOPTANK RIVER BACTERIA REPORT 5/28:
This week, only 6 of 16 sites passed Maryland’s recreational water quality standard for Enterococci bacteria. Trappe Landing showed a major improvement, dropping from 4,374 CFU to 61 CFU and moving into the passing range. Highest results this week were at Two Johns Landing (520 CFU) and Kingston Landing (504 CFU).
We did receive rainfall in the days leading up to sampling, but it was slow and steady rather than heavy downpours. That matters. While we still saw several failing results, they were mostly moderate failures and not the extreme spikes in the thousands we sometimes see.
That pattern suggests the landscape had more time to absorb rainfall into the ground, rather than producing rapid runoff. With slower rainfall over a previously dry, drought-influenced landscape, more water likely infiltrated the soil instead of overwhelming stormwater and wastewater systems that often transport bacteria into the river. In contrast, short, intense storms tend to create flash runoff that drives much higher bacteria spikes.
One result worth noting: Bellevue Beach (106 CFU) narrowly missed passing, just above the 104 CFU standard.
📲 Swipe through the images for this week’s full results.
📍Weekly updates available at:
• Shorerivers.org/swim
• The app
• All ShoreRivers + Riverkeeper social media channels ( )
⚠️ SAFE SWIMMING REMINDERS ⚠️
• Avoid swimming for 24–48 hours after heavy rain
• Do not swim with open cuts or wounds
• Rinse off after swimming
• Watch for algal blooms, rough water, and other hazards
• Results above 104 CFU/100mL are considered failing under Maryland’s recreational water quality guidance
👉 Reminder: not all testing locations are designated swimming beaches. Please follow all posted rules and use caution when entering the water.
Huge thanks to our volunteer SwimTesters and site sponsors for making this program possible!