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MercNet Monitoring Inventory: Online Library
USGS - Water Hg Data from Minnesota USGS reports
| OverviewCompilation of THg and MeHg data from five USGS monitoring studies of lakes and streams in Minnesota. Conducted 1997-2008. Focused on surface water; all grab samples of various depths. Source Agency: U.S. Geological Survey ContactMark Brigham, Hydrologist Address Phone: 763-783-3274 |
| Name of dataset | Water Hg Data from Minnesota USGS reports |
| Geographic area | Minnesota |
| State/Province | MN |
| Activity Category | Monitoring |
| Medium | water |
| Focal species | surface water |
| Tissue Types | grab sample (water) |
| Approximate size of dataset | 430 |
| Positional data available? | georeferences for sampling stations available online at http://waterdata.usgs.gov/mn/nwis/inventory/ |
| Start Date | 1997 |
| End Date | 2008 |
| Status | Ongoing |
| Collection season | all seasons |
| Collection Months | all months |
| Current # Of Sampling Locations | 0 |
| Historic # Of Sampling Locations | 83 |
| Size of Sampling Area | Minnesota |
| Ecosystem Focus | Minnesota streams and lakes |
| Additional Info | The Glacial Ridge study in ongoing. All other studies are completed. Data are open access with exception of Glacial Ridge. |
| Quality Assurance | yes |
| Data Format | online |
| Hg Measurement Units | ng/L or pg/mL (ppt) |
| Ancillary Data | depends on study, may have info on secchi depth, DO, pH, temperature, calcium, magnesium, potassium, sodium, alkalinity, bicarbonate, carbonate, flouride, silica, sulfate, ammonia, organic N, NH3, NO2, NO3, nitrite, orthophosphate, phosphorus, organic carbon, iron, manganese |
| Data downloadable on external website? | Georeferences for sampling stations available online at http://waterdata.usgs.gov/mn/nwis/inventory/. Much of the sata are available in USGS reports. This dataset derives from 5 studies, as noted in the "project" field. Data from each study may be found in the reports listed below: RedRiverImpoundments: Brigham et al., Water Air and Soil Pollution 2002, 138, 61-78; and Brigham, M. E. et al., USGS Open-File Report 99-273A, 2000. Voyageurs: Woodruff, L. G. et al., USGS, in press; and Goldstein et al., USGS Open-File Report 03-480, 2003, http://pubs.usgs.gov/of/2003/ofr03-480/pdf/ofr03-480.pdf. StCroix: Payne and Hansen, USGS WRIR 03-4223. Seepage: Menheer et al., USGS SIR 2004-5298, http:%2 |
| Other Databases | USGS reports; field definitions at NWIS |
| Method used to date sediment | Pb-210 |
| Depth of Water Sample | grab samples (depth varies) |
| Pore Size of Filter | 0.7 |
| Comments | Data are open access, with exception of all data from Glacial Ridge (this project is ongoing, so data are incomplete and have not yet been verified). |
