Boulder County COVID-19 status is at Level Clear | Vaccine locations and info is available in English and Spanish.

moose drinking water

Water Quality

Blue-Green Algae

While blue-green algae have been confirmed in lakes and ponds in Colorado for the past few years, Boulder County Public Health is not testing for it in any parks and open space areas.

Not all algae is harmful to humans or pets, but the best way to keep your family safe during an algae bloom is to:

  • Keep out of the water, including children and pets.
  • Avoid drinking the water.
  • Avoid boating near or through algae blooms.
  • Clean fish from a water body with algae blooms well and discard the guts appropriately.
  • When in doubt, just stay out!
  • Learn More

Boulder County works to improve water quality, prevent waterborne illness, and reduce negative environmental and public health impacts to our local water sources.

bottles of prescription medication

Pharmaceutical Disposal

Reduce the amount of chemicals that reach our waterways by following simple steps for home disposal or by dropping your pharmaceuticals off at a designated site. Learn more about home disposal and drop-off events.

septic tank lid

SepticSmart (Onsite Wastewater Systems)

Septic systems are a common source of groundwater contamination in our country. Unapproved, aging, and failing septic systems have a large impact on the quality and safety of our water supply. Check the records for your septic system and learn more about property transfer requirements.

girl drinking a glass of water

Well Water

Unlike a public drinking water system, private wells do not have experts regularly checking the water quality before it is sent to the tap. Private well water quality varies from source to source.