Erin L Gray Taylor M Kirkpatrick Taryn Chaya 20251209 spreadsheet https://doi.org/10.5066/P94HCVQF This dataset contains metals concentrations of surface water samples processed using two different filter sizes (0.03 micron and 10 micron) from the Florida River and two of its tributaries, Pine Creek and Salt Creek, within the Southern Ute Indian Reservation in southern Colorado. The surface water samples were collected during three sampling events in April 2022, May 2022, and August–September 2022. The data will aid investigators in understanding the sources and seasonality of aluminum in the Florida River. These data were collected to better understand the sources of aluminum in surface water in the Florida River in southern Colorado. Samples were submitted to the U.S. Geological Survey Mineral Resources Program's Analytical Chemistry laboratory, who subcontracts sample analysis to SGS Canada Laboratory. All results contained in this data release were analyzed by the subcontracted SGS Canada Laboratory. 20220404 20220901 ground condition Complete None planned -107.8854 -107.6894 37.2240 37.0015 ISO 19115 Topic Category environment None inductively coupled plasma optical emission spectroscopy/inductively coupled plasma mass spectroscopy ICP-OES/ICP-MS USGS Thesaurus dissolved metals surface water quality Geochemistry Water Quality USGS Metadata Identifier USGS:64dc1954d34e5f6cd55247ab None Florida River Pine Creek Salt Creek Common geographic areas Southern Ute Indian Reservation None. Please see 'Distribution Info' for details. None. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. Erin L Gray U.S. Geological Survey, ROCKY MOUNTAIN REGION Hydrologist mailing address

520 North Park Avenue

Tucson AZ 85719 US 505-830-7900 505-830-7998 egray@usgs.gov These data were collected with the support of the Southern Ute Indian Tribe, the U.S. Environmental Protection Agency, and the New Mexico Environment Department. The data are considered accurate. Internal laboratory quality-control results of laboratory control samples, performed with each batch of submitted samples at a rate of 10 percent, were reviewed by the authors of this data release and confirm the accuracy of the data. Field quality-control sample data collected for this project are included in this dataset. Environmental results within 5 times the highest field blank detection were rejected because of the possibility of sample bias, except for aluminum and sodium results. These potentially biased results were retained because of their relevance to planned interpretation of the data. To document the potential bias of these samples in this dataset, the highest blank detection was noted in the result comment. In some instances, when review of field blank detections resulted in rejection of an environmental result, field quality-control data in this dataset may not be associated with corresponding environmental results, as rejected environmental data were removed from this dataset. Replicate quality-control data in this dataset may be used to better understand environmental variability and other sources of variability in the data, but these quality-control data were not used to reject any environmental data in this dataset. Analytical result values are presented with the same number of significant figures that were provided by the laboratory. The data have been verified and are considered accurate. The dataset is complete. Accuracy of the horizontal coordinates ranges from plus or minus one second to plus or minus five seconds. The accuracy is indicated by the decimal precision of the coordinates provided. Surface-water samples were collected using methods described in the National Field Manual (https://pubs.water.usgs.gov/twri9A) and filtered at the field site using either 0.03 micron or 10 micron filters into acid-rinsed polypropylene bottles. 2022 After filtration, samples were acidified to a pH of less than 2.0 using nitric acid then chilled. 2022 Samples were shipped chilled to the laboratory within a week of sample collection. 2022 Samples were analyzed for metals in the various filtered aliquots by inductively coupled plasma optical emission spectroscopy/inductively coupled plasma mass spectroscopy (ICP-OES/ICP-MS). 2022 U.S. Geological Survey, Mineral Resources Program, Analytical Chemistry project Jaime S Azain Geologist mailing address

Mail Stop 973, W 6th Ave Kipling St

Lakewood CO 80225 US 303-236-9376 303-236-3200 jsazain@usgs.gov 0.0014 0.0014 Decimal degrees North American Datum of 1983 (NAD 83) Geodetic Reference System 1980 6378137.000000 298.257222 FLR_water_results.csv Comma Separated Value (CSV) file containing data. Producer Defined station_name U.S. Geological Survey station name U.S. Geological Survey National Water Information System The name (in the U.S Geological Survey National Water Information System) of the surface-water site where the streambed sediment sample was collected. station_ID U.S. Geological Survey station identification number U.S. Geological Survey National Water Information System A 15-digit numeric number that is generated during creation of the site in the USGS National Water Information System database. sample_date Sample collection date Producer Defined 4/4/2022 9/1/2022 sample_time Sample collection time Producer Defined 8:00:00 AM 4:00:00 PM latitude_NAD83 Latitude, North American Datum of 1983 Producer Defined 37.0621 37.223 decimal degrees sample_type Sample type Producer Defined Environmental The sample is an environmental sample. Producer defined Split replicate The sample is a split replicate. It was was collected into the same sample-compositing container as the environmental sample, then processed into separate sample bottles in the field. The paired environmental sample can be identified as the sample collected at the same site on the same day. The replicate sample time has a one-minute offset from the environmental sample time. Producer defined Field blank The sample is a field blank. Field blanks were collected using methods described in the National Field Manual (https://pubs.water.usgs.gov/twri9A). Field blanks were processed in the field at various sampling locations, and are associated with environmental samples in this dataset. Associated environmental samples were collected at the same site on the same day. The field blank time has an eight-minute offset from the environmental sample time Producer defined longitude_NAD83 Longitude, North American Datum of 1983 Producer Defined -107.8679 -107.705 decimal degrees pname Parameter name Producer Defined Chemical compound name. Similar to USGS NWIS parameter names, but modified to account for the filter sizes used for this project. filter_sz Filter size Producer Defined 0.03 µm 0.03 micron filter Producer defined 10 µm 10 micron filter Producer defined result_val Result value Producer Defined 0.01 4590 remark_cd Remark code Producer Defined << empty cell >> Absence of a qualifier indicates that the analyte was detected by the laboratory at the concentration reported in the result_val field. Producer defined < Less than symbol. Indicates that the analyte was not detected by the laboratory or did not meet qualitative laboratory criteria and was below the concentration reported in the result_val field Producer defined result_unit Result units Producer Defined µg/l micrograms per liter Producer defined mg/l milligrams per liter Producer defined mg/l as P milligrams per liter as phosphorus Producer defined result_val_qual Result value qualifier Producer Defined Information related to the result value stored in the result_val field. report_lv_val Reporting level value Producer Defined 0.01 70.0 report_lv_unit Reporting level units Producer Defined µg/l micrograms per liter Producer defined mg/l milligrams per liter Producer defined mg/l as P milligrams per liter as phosphorus Producer defined adate Analysis date Producer Defined 11/29/2022 12/9/2022 result_comment Result comment Producer Defined Comments related to sample collection, analysis, or data review. anennm Analyzing entity name Producer Defined The laboratory that performed the analysis. GS ScienceBase U.S. Geological Survey mailing address

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Digital Data https://doi.org/10.5066/P94HCVQF None 20251209 Erin L Gray U.S. Geological Survey, ROCKY MOUNTAIN REGION Hydrologist mailing address

520 North Park Avenue

Tucson AZ 85719 US 505-830-7900 505-830-7998 egray@usgs.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998