Search datasets
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Notes: As of June 2020 this dataset has been static for several years. Recent versions of NHD High Res may be more detailed than this dataset for some areas, while this dataset may still be more...
Search relevance: 114.54 | Views last month: 1 | Catalog Last Checked: October 24, 2026 at 08:50 PM -
Hydrophobic (sediment-associated) pesticides were measured in sediment samples collected from 82 wadeable streams and in biofilm in 54 of those streams in the Central California Foothills and...
Search relevance: 99.36 | Views last month: 5 | Catalog Last Checked: September 10, 2026 at 09:04 PM -
These data are from joint visual encounter and environmental DNA (eDNA) surveys conducted for northwestern pond turtles (Actinemys marmorata) in streams on privately-owned timberlands in northern...
Search relevance: 92.77 | Views last month: 3 | Catalog Last Checked: September 10, 2026 at 08:18 PM -
Changes to instream flow are known to be one of the major factors that affect the health of biological communities. Flow alteration can degrade physical habitat and alter water quality, reducing...
Search relevance: 90.69 | Views last month: 1 | Catalog Last Checked: October 24, 2026 at 08:44 PM -
These data are from joint visual encounter and environmental DNA (eDNA) surveys conducted for northwestern pond turtles (Actinemys marmorata) in streams on privately-owned timberlands in northern...
Search relevance: 90.45 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 10:36 PM -
The data support a study that surveyed the spatial distribution of Oncorhynchus mykiss and Cottus aleuticus eDNA in coastal streams of Big Sur, California, 2021-2022 following post-fire debris...
Search relevance: 76.77 | Views last month: 4 | Catalog Last Checked: September 10, 2026 at 09:19 PM -
A product of the California Essential Habitat Connectivity Project - http://www.dfg.ca.gov/habcon/connectivity/, potential riparian connections were extracted from the Statewide 1:100k Routed...
Search relevance: 61.38 | Views last month: 1 | Catalog Last Checked: October 24, 2026 at 08:50 PM -
California Public Resources Code, Chapter 1.4. California Wild and Scenic Rivers Act, Section 5093.50. It is the policy of the State of California that certain rivers which possess extraordinary...
Search relevance: 58.95 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 06:18 PM -
This dataset includes water-quality data collected at 16 sites in the Clear Lake Drainage Basin, Lake County, California, between November 2018 and March 2025. Sampling targeted high-flow events...
Search relevance: 52.92 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 10:01 PM -
Human-use pharmaceutical compounds were analyzed at the U.S. Geological Survey, National Water Quality Laboratory, Denver, Colorado, in wadeable streams in 4 Regional Stream Quality Assessments:...
Search relevance: 48.29 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 10:30 PM -
The Passage Assessment Database (PAD) geospatial file contains locations of known and potential barriers to salmonid migration in California streams with additional information about each record....
Search relevance: 42.38 | Views last month: 4 | Catalog Last Checked: October 24, 2026 at 08:45 PM -
The USGS National Hydrography Dataset (NHD) downloadable data collection from The National Map (TNM) is a comprehensive set of digital spatial data that encodes information about naturally...
Search relevance: 37.69 | Views last month: 3 | Catalog Last Checked: September 10, 2026 at 06:11 PM -
The data set captures California Fish & Game Code section 1505 as stream events on CalHydro 100k hydrography, a CalFish developed derivitave of the National Hydrography Medium Resolution Dataset.
Search relevance: 30.72 | Views last month: 6 | Catalog Last Checked: October 24, 2026 at 08:43 PM -
This layer is intended to be used as an informal means of spatially aggregating data collected by an array of regional teams monitoring drought effects upon California Streams. These informal...
Search relevance: 28.13 | Views last month: 2 | Catalog Last Checked: October 24, 2026 at 08:48 PM -
This data set includes 28 physical watershed attributes for each of 135,118 stream segments (National Hydrodraphy Dataset, Version 1) in California. These data were used to support a report...
Search relevance: 27.97 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 08:41 PM -
Stream-obligate amphibians are important indicators of ecosystem health in the Pacific Northwest, but distributional information to improve forest management is lacking in many regions. We...
Search relevance: 27.76 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 07:54 PM -
This dataset includes spatial locations in the Pacific Northwest where streamflow observations were recorded. For the purpose of this investigation, all streamflow observations were converted into...
Search relevance: 27.53 | Views last month: 3 | Catalog Last Checked: September 10, 2026 at 07:49 PM -
IMPORTANT NOTE: This dataset includes spatial locations where streamflow permanence observations (continuous flow and dry) were recorded and stored as part of the Pacific Crest Trail (PCT) water...
Search relevance: 27.53 | Views last month: 0 | Catalog Last Checked: October 11, 2026 at 04:27 AM -
IMPORTANT NOTE: This dataset includes spatial locations where streamflow permanence observations (continuous flow, discontinuous flow, and dry) were recorded using the FLOwPER (FLOw PERmanence)...
Search relevance: 27.44 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 09:16 PM -
California Red-legged Frogs (Rana draytonii) are typically regarded as inhabitants of permanent ponds, marshes, and slow-moving streams, but their ecology in other habitats, including coastal...
Search relevance: 27.33 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 08:13 PM
