Lake · Somerset County · ME
Is King and Bartlett Lake safe to swim?
No advisory or algae bloom reported for this water today.
Updated July 22, 2026 · EPA CyAN satellite
SwimZone for iPhone · launching soon
King and Bartlett Lake is clear today. Be the first to know when it's not.
SwimZone checks this water every day and pings you the moment a bacteria or algae advisory goes up.
What's in the water at King and Bartlett Lake right now
As of July 22, 2026, King and Bartlett Lake in Somerset County, Maine is clear to swim. Satellite imagery detected no blue-green algae bloom as of July 18, 2026. Rainfall over the past week totaled 0.3 in, which can wash bacteria and nutrients into the water.
Blue-green algae at King and Bartlett Lake
King and Bartlett Lake is a lake in Somerset County, Maine. Satellite imagery detected no blue-green algae bloom as of July 18, 2026.
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.
Bloom history at King and Bartlett Lake
From EPA CyAN's satellite archive
Over 7 summers of satellite monitoring since 2020, King and Bartlett Lake has reached blue-green algae advisory levels in 1 of them, most recently in June 2022. Blooms here have been occasional rather than annual. Its highest recorded reading was 110,913 cells/mL in June 2022.
Frequently asked: swimming in King and Bartlett Lake
- Is it safe to swim in King and Bartlett Lake right now?
- King and Bartlett Lake is clear to swim today. Satellite imagery detected no blue-green algae bloom as of July 18, 2026. Conditions can change quickly with wind, heat, and rain, so check the posted signs and look at the water before you get in.
- Does King and Bartlett Lake have blue-green algae (cyanobacteria)?
- No blue-green algae bloom is detectable at King and Bartlett Lake as of July 18, 2026 (below the satellite's roughly 10,000 cells/mL detection limit). Cyanobacteria can still appear within hours in warm, calm, nutrient-rich water, so look before you swim.
- Can dogs swim in King and Bartlett Lake?
- No bloom is detected at King and Bartlett Lake today, but dogs are much more vulnerable to blue-green algae than people, and blooms can form within hours. Always keep dogs away from water that looks green, scummy, or discolored, and rinse them off after swimming.
- How often does King and Bartlett Lake have blue-green algae blooms?
- Over 7 summers of satellite monitoring since 2020, King and Bartlett Lake has reached blue-green algae advisory levels in 1 of them, most recently in June 2022. Blooms here have been occasional rather than annual. Its highest recorded reading was 110,913 cells/mL in June 2022.
- 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 King and Bartlett Lake'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 King and Bartlett Lake, and a recent-rainfall overlay, all refreshed daily. It was last updated July 22, 2026.