The BCMB high flow water quality data is now available along with an initial analysis provided in this document. The first phase of results from the BCMB study are now available. This data monthly data gathered by the City of Boulder.
Water quality is excellent in samples from North and Middle Boulder Creeks near the headwaters.
There is some degradation as the creek moves down Boulder Canyon, further degradation through the City of Boulder, and significant degradation east of the City of Boulder. The parameters of most concern to the health of Boulder Creek are ammonia, nitrate, and phosphorus. Some samples from Boulder Creek also indicated elevated levels of fecal coliform. To see the data, select here . Urban runoff Wastewater Effluent Geology Geology and topography are significant factors in changing water quality in the creek as it moves from mountains to plains.