Is Tim Pond safe to swim?

As of July 22, 2026, Tim Pond in Franklin County, Maine carries a swim caution. Satellite imagery measured 68,477 cells/mL of blue-green algae on July 18, 2026, elevated but below the 100,000 cells/mL advisory threshold. Rainfall over the past week totaled 0.3 in, which can wash bacteria and nutrients into the water.

How this read is built

Tim Pond is a pond in Franklin County, Maine covering about 0.4 sq mi, the 307th-largest of the 319 lakes SwimZone monitors in Maine. Satellite imagery measured 68,477 cells/mL of blue-green algae on July 18, 2026, elevated but below the 100,000 cells/mL advisory threshold.

Blue-green algae (cyanobacteria) blooms are most common from midsummer into early fall, when the water is warm, calm, and rich in nutrients from runoff. They can produce toxins that make people sick and can be rapidly fatal to dogs, so skip water that looks green, scummy, or like spilled paint, and keep children and pets out of it.

Over 6 summers of satellite monitoring since 2020, Tim Pond has not reached a blue-green algae advisory level. Conditions can still change quickly, so check the current read before you swim.

Is it safe to swim in Tim Pond right now?

Tim Pond carries a swim caution today. Satellite imagery measured 68,477 cells/mL of blue-green algae on July 18, 2026, elevated but below the 100,000 cells/mL advisory threshold. Conditions can change quickly with wind, heat, and rain, so check the posted signs and look at the water before you get in.

Does Tim Pond have blue-green algae (cyanobacteria)?

Low levels. Satellite monitoring measured 68,477 cells/mL at Tim Pond on July 18, 2026, below the 100,000 cells/mL advisory threshold. Keep an eye out for surface scum, which can concentrate quickly.

Can dogs swim in Tim Pond?

Use caution. Blue-green algae at Tim Pond are elevated (68,477 cells/mL on July 18, 2026). Dogs are far more sensitive to cyanobacteria than people, so keep them out of the water and away from surface scum.

How often does Tim Pond have blue-green algae blooms?

Over 6 summers of satellite monitoring since 2020, Tim Pond has not reached a blue-green algae advisory level. Conditions can still change quickly, so check the current read before you swim.

How many Maine lakes and beaches are unsafe for swimming today?

Today, 15 Maine waters are above a safe-contact threshold and 33 more warrant caution, out of 457 monitored waters SwimZone tracks in the state.

How is Tim Pond's water quality measured?

SwimZone builds this read from EPA CyAN satellite imagery for blue-green algae, official beach and fecal-bacteria advisories where a program monitors Tim Pond, and a recent-rainfall overlay, all refreshed daily. It was last updated July 22, 2026.