Monitoring Data and Map in the San Juan Watershed
On this page:
- Sampling Data Results: Links to available monitoring data from EPA sampling events in the watershed.
- Map of monitoring locations: An interactive map of sediment and surface water sampling results by location in the San Juan River watershed.
- Preliminary Analysis of Water Quality Data: Links to presentations from a 2020 webinar series focused on our understanding of the San Juan Watershed.
- Monitoring Site Photo Library: View a photo tour of sampling sites throughout the watershed.
NOTE: some of the downloads on this page are large and may work better on a desktop computer.
Sampling Data Results
Below are links for data from each monitoring event conducted in the watershed for which results are currently available. Data are provided in .csv file format from EPA’s Water Quality Portal. Data from subsequent monitoring events will be added as the data become available.
- 10/2/2018 - 10/8/2018: Storm Sampling - 2018 (.csv 276K)
- 11/5/2018 - 11/15/2018: Routine Sampling - Fall 2018 (.csv 1.9MB)
- 3/5/2019 - 3/9/2019: Routine Sampling - Winter 2019 (.csv 1.7MB)
- 5/12/2019 - 5/17/2019: Routine Sampling (Rising Limb) - Spring 2019 (.csv 2.0MB)
- 6/4/2019 - 6/7/2019: Routine Sampling (Peak Runoff) - Summer 2019 (.csv 1.7MB)
- 10/2/2019 - 10/9/2019: Routine Sampling - Fall 2019 (.csv 1.6MB)
- 2/24/2020 – 3/2/2020: Routine Sampling – Winter 2020 (.csv 1.5MB)
- 9/28/2020 – 10/3/2020: Routine Sampling – Fall 2020 (.csv 1.7MB)
- 2/22/2021 – 2/27/2021: Routine Sampling – Winter 2021 (.csv 1.7MB)
- 5/02/2021 – 5/07/2021: Routine Sampling (Rising Limb) – Spring 2021 (.csv 1.7 MB)
- 5/23/2021 – 5/29/2021: Routine Sampling (Peak Runoff) – Summer 2021 (.csv 1.7 MB)
- 9/17/2021 – 9/23/2021: Routine Sampling – Fall 2021 (.csv 1.8 MB)
(Links to .csv files tend to open slowly after you click.)
Map of monitoring locations
To view the locations of the 39 monitoring sites across the watershed, select the “Long-Term Monitoring Sites” layer. To view available monitoring results, select a site and follow the links provided in the dialog box. Data downloads include all data currently available in EPA’s Water Quality Portal. Read a summary of which sites were sampled during each sampling event.
Click here for a fullscreen map.
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Preliminary Analysis of Water Quality Data
In 2020, the San Juan Watershed Program held a webinar series focused on our understanding of the San Juan Watershed. The presentations are provided below. This information is provided for informational purposes only and is not final. This information is preliminary and may be revised.
- Overview of the San Juan Watershed (Session 1) (pdf)
- Discussion on water quality for metals, sediments, and nutrients in the San Juan Watershed
- Discussion on water quality for E. coli in the San Juan Watershed (pdf)
- Discussion on several Watershed Planning efforts in the San Juan Watershed (pdf)
Monitoring Photo Library
Use the links below to view an interactive photo tour of the 39 sampling sites throughout the watershed. Photos are indexed by site location, and show each site under varying conditions.
- Animas River Photo Index (pdf) (18.5 MB)
- San Juan River Photo Index (pdf) (22.9 MB)