Displays the boundaries of metro; water; or water and sanitation districts within unincorporated Adams County. Updated annually. Last updated: January 2018

Feature Layer: Adams County Boundary (2020)Description: Adams County Health Department created this layer from Census 2020 data files.Source: Census 2020 TIGER FilesType: Polygon LayerAttributes: Spatial dataProcess: ACHD downloaded the Census 2020 TIGER file for Adams County, Colorado.Description provided by Adams County Health Department.

Displays the rivers, streams, and canals that are located within Adams County. Data was created from on-screen digitizing. Classification of rivers is provided by the Transportation Department. Last Updated: December 2013

GIS data and locations of zoning in Adams County in 2019.

GIS data and locations of subdivisions in Adams County in 2019.

GIS data on locations of libraries in Adams County in 2019.

A layer depicting cities boundaries in Adams County, Colorado. The city boundaries are derived from the Zoning layer. Updated Monthly.

Displays the boundaries of fire districts within unincorporated Adams County, Colorado. Updated annually. Last updated: May 2021

GIS data on locations of police stations in Adams County in 2019.

This data release includes GIS datasets supporting the Colorado Legacy Mine Lands Watershed Delineation and Scoring tool (WaDeS), a web mapping application available at https://geonarrative.usgs.gov/colmlwades/. Water chemistry data were compiled from the U.S. Geological Survey (USGS) National Water Information System (NWIS), U.S. Environmental Protection Agency (EPA) STORET database, and the USGS Central Colorado Assessment Project (CCAP) (Church and others, 2009). The CCAP study area was used for this application. Samples were summarized at each monitoring station and hardness-dependent chronic and acute toxicity thresholds for aquatic life protections under Colorado Regulation No. 31 (CDPHE, 5 CCR 1002-31) for cadmium, copper, lead, and/or zinc were calculated. Samples were scored according to how metal concentrations compared with acute and chronic toxicity thresholds. The results were used in combination with remote sensing derived hydrothermal alteration (Rockwell and Bonham, 2017) and mine-related features (Horton and San Juan, 2016) to identify potential mine remediation sites within the headwaters of the central Colorado mineral belt. Headwaters were defined by watersheds delineated from a 10-meter digital elevation dataset (DEM), ranging in 5-35 square kilometers in size. Python and R scripts used to derive these products are included with this data release as documentation of the processing steps and to enable users to adapt the methods for their own applications. References Church, S.E., San Juan, C.A., Fey, D.L., Schmidt, T.S., Klein, T.L. DeWitt, E.H., Wanty, R.B., Verplanck, P.L., Mitchell, K.A., Adams, M.G., Choate, L.M., Todorov, T.I., Rockwell, B.W., McEachron, Luke, and Anthony, M.W., 2012, Geospatial database for regional environmental assessment of central Colorado: U.S. Geological Survey Data Series 614, 76 p., https://doi.org/10.3133/ds614. Colorado Department of Public Health and Environment (CDPHE), Water Quality Control Commission 5 CCR 1002-31. Regulation No. 31 The Basic Standards and Methodologies for Surface Water. Effective 12/31/2021, accessed on July 28, 2023 at https://cdphe.colorado.gov/water-quality-control-commission-regulations. Horton, J.D., and San Juan, C.A., 2022, Prospect- and mine-related features from U.S. Geological Survey 7.5- and 15-minute topographic quadrangle maps of the United States (ver. 8.0, September 2022): U.S. Geological Survey data release, https://doi.org/10.5066/F78W3CHG. Rockwell, B.W. and Bonham, L.C., 2017, Digital maps of hydrothermal alteration type, key mineral groups, and green vegetation of the western United States derived from automated analysis of ASTER satellite data: U.S. Geological Survey data release, https://doi.org/10.5066/F7CR5RK7.

Landfills in Adams County, Colorado

Adams County Colorado boundary. Maintained by the Assessor's Department.

Parcels shapefile in Adams County, Colorado containing ownership and site address information. Updated weekly. This layer can be related to the Property Sales, Property Values and Property Improvements tables on the PARCELNB field. The standalone property tables are updated before the Parcels feature layer so there can be small discrepancies between them. These parcels are intended to depict approximate location of land ownership. NOT FOR ENGINEERING PURPOSES. This data is not survey accuracy. The only people that can perform official surveys in the State of Colorado are Colorado Licensed Professional Land Surveyors. For a more detailed description of the parcel tables, refer to this document: Assessor Data Descriptions

Voter precincts in Adams County, Colorado. Last updated: May 2025

Displays the boundaries of the use management areas (including parks and open spaces) that are located in unincorporated Adams County. Information is kept by Adams County Parks and Open Space Department.

Property sales in Adams County, Colorado. Updated weekly. This table can be joined to the Parcels feature layer on the PARCELNB field. The standalone property tables are updated before the Parcels feature layer so there can be small discrepancies between them. For a more detailed description of this table, refer to this document: Assessor Data Descriptions

Data was created based on these projects:West Adams Densification published April 1996. This GPS project was performed by John E Chance & Associates Inc. for Adams County Urban Drainage & Flood Control District and Metro Wastewater Reclamation District. Field observations were made in 1995 with the Final Report published in January 1996. The horizontal accuracy was 1:500;000 and the vertical accuracy was Third Order (NGS).The 1999 Adams County GIS Survey of Section Corners was completed by locating the Aliquot Corners (Section corners) within the westerly 1/3 of Adams County utilizing GPS Real Time Kinematic (RTK) survey techniques as part of the East Adams Densification published in November 1999. East Adams Densification horizontal accuracy was 1:500;000 and the vertical accuracy was Third Order (NGS).The horizontal coordinates are in North American Datum(NAD) 1983 (1992). The orthometric (vertical) values are in North American Vertical Datum (NAVD) 1988.

Mobile home parks in Adams County, Colorado. Maintained by the Assessor's Department. Updated weekly.

Subdivisions in Adams County, Colorado. Data is maintained by the Assessor's Department. Updated weekly.

Displays the school district boundaries for Adams County, Colorado. Updated annually.