Water Quality in Lakes and Streams

Person sampling water quality DDPHE's Environmental Quality Division monitors water quality in the streams and lakes within the City and County of Denver's boundaries. Streams are monitored year-round while lakes are typically sampled once per year during the summer.

The results of monitoring are summarized in reports and presented in maps.



Water Quality Reports and Data

Results from stream monitoring are summarized in story maps. Lake monitoring results are summarized in one-page briefs that are generally updated biannually. Lake summaries are intended to provide a quick look at lake history, developing issues, pressing problems, and management recommendations. 

The most recent versions of these reports are available by clicking on the links below. Additionally, data are available from the City's Open Data Catalog. Contact the Water Quality Team at WaterQuality@denvergov.org or by calling 311 for lakes data or to get copies of older reports.


Water Quality Story Maps:

Lake Reports