moose drinking water

Water Quality

Blue Green Algae

Testing for Blue Green Algae

Boulder County is not currently testing natural water ways for blue green algae. We encourage you to always to be mindful of your surroundings and exercise caution when deciding to recreate or allow pets to recreate in lakes and streams. When in doubt, just stay out!

  • Keep out of the water, including children and pets
  • Do not drink the water
  • Avoid boating near or through algae blooms
  • Clean fish well and discard guts appropriately

We recognize this is a concern for our community. We will continue to monitor the issue and update notifications.

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.