Boulder County government offices are closed Wednesday, June 19, in observance of Juneteenth. Primary Elections Vote Center locations are open.

moose drinking water

Water Quality

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

girl drinking a glass of water

Free Well Water Testing for Marshall Fire

People whose homes were impacted by the Marshall Fire can access free well water testing from Purdue University.

Blue green algae

Blue-Green Algae

Be cautious of algal blooms in lakes and ponds. Boulder County does not test for toxic algae.

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.