Filters: Categories: Data Release - In Progress (X) > Categories: Data (X) > partyWithName: U.S. Geological Survey, SOUTHWEST REGION (X)

Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Types Map Service (1) OGC WFS Layer (1) OGC WMS Layer (1) OGC WMS Service (1) Contacts Katy O'Donnell U.S. Geological Survey Benjamin S Linhoff GS ScienceBase Brian A. Bergamaschi Bryan D. Downing Crystal Sturgeon Tag Types Theme (2) Place (1) Tag Schemes None (2) USGS Thesaurus (1) ISO 19115 Topic Category (2) Geographic Names Information System (1) View Results as: JSON ATOM CSV

Artificial sweetener results from groundwater and surface water samples collected on Kirtland Air Force Base and the surrounding region As part of a large-scale study of nitrate contamination on Kirtland Air Force Base in central New Mexico, the USGS collected groundwater and surface water samples for artificial sweetener analyses. Samples were collected following standard USGS procedures (U.S. Geological Survey, variously dated), filtered to 0.45 microns, and frozen until analysis. Artificial sweeteners analyzed include neotame, acesulfame-K, aspartame, saccharin, and sucralose. Of the 49 sites sampled, 17 sites had measurable detections of artificial sweeteners. Neotame was the most commonly detected sweetener (n=12) followed by saccharin (n=5), acesulfame-K (n=2), aspartame (n=1), and sucralose (n=0). Concentrations ranged from 0.0003–0.011 μg/L... Categories: Data, Data Release - In Progress; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: artificial sweetener, hydrology, water quality, environment Assessing spatial variability of nutrients and related water quality constituents in the California Sacramento-San Joaquin Delta: 2015-2022 High resolution mapping surveys in the North Delta-Suisun Habitat Arc This data release documents the spatial and temporal variability of nutrients and related water quality parameters at high spatial resolution in the Sacramento-San Joaquin River Delta of California, USA. The data set includes nitrate, ammonium, phosphate, dissolved organic carbon, temperature, conductivity, dissolved oxygen, turbidity, and chlorophyll. Data-collection were conducted over fourteen days between April 2015 - October 2022 with support from multiple cooperators. NOTE: Files marked as preliminary are provisional and are subject to revision. They are being provided to meet the need for timely best science. The data have not received final approval by the U.S. Geological Survey (USGS) and are provided... Categories: Data, Data Release - In Progress; Tags: Cache Slough, California, Central Valley, Lower Sacramento, Sacramento River, All tags... Sacramento-San Joaquin Delta, San Francisco Bay, United States, Yolo Bypass, biogeochemistry, biota, delta, discrete sampling, drinking water use, environment, high-resolution, hydrogeology, inlandWaters, nutrient content (water), nutrients, phytoplankton, public supply water use, real-time, statistical analysis, visualization methods, water quality, Fewer tags