Catalog - Data.gov

#1 Federal

Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for farm fertilizer (gwava-s_ffer)

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This data set represents the average annual nitrogen input from commercial fertilizer applied to agricultural lands, 1992-2001, in kilograms per hectare, in the conterminous United States. The...

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Search relevance: 1.00 | Views last month: 15 | Catalog Last Checked: May 05, 2026 at 07:37 PM

#2 Federal

Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for drainage ditch (gwava-s_ddit)

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This data set represents the area of National Resources Inventory surface drainage, field ditch conservation practice, in square kilometers, in the conterminous United States. The data set was...

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Search relevance: 1.00 | Views last month: 11 | Catalog Last Checked: May 05, 2026 at 09:46 PM

#3 Federal

Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for water input (gwava-dw_wtin)

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This data set represents "water input," the ratio of the total area of irrigated land to precipitation, in square kilometers per centimeter, in the conterminous United States. The data set was...

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Search relevance: 1.00 | Views last month: 8 | Catalog Last Checked: May 05, 2026 at 07:57 PM

#4 Federal

Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for semiconsolidated sand aquifers (gwava-dw_semc)

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This data set represents the presence or absence of semiconsolidated sand aquifers in the conterminous United States. The data set was used as an input data layer for a national model to predict...

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Search relevance: 1.00 | Views last month: 6 | Catalog Last Checked: May 05, 2026 at 09:47 PM

#5 Federal

Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for confined manure (gwava-dw_conf)

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This data set represents the average annual nitrogen input from confined animal manure, 1992 and 1997, in kilograms per hectare, in the conterminous United States. The data set was used as an...

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xml

Search relevance: 1.00 | Views last month: 6 | Catalog Last Checked: May 05, 2026 at 09:05 PM

#6 Federal

Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for water input (gwava-s_wtin)

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This data set represents "water input," the ratio of the total area of irrigated land to precipitation, in square kilometers per centimeter, in the conterminous United States. The data set was...

xml
xml

Search relevance: 1.00 | Views last month: 6 | Catalog Last Checked: May 05, 2026 at 09:27 PM

#7 Federal

Predicted nitrate and arsenic concentrations in basin-fill aquifers of the Southwest Principal Aquifers study area

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This product "Predicted nitrate and arsenic concentrations in basin-fill aquifers of the Southwest Principal Aquifers study area" is a 1:250,000-scale vector dataset and was developed as part of...

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Search relevance: 1.00 | Views last month: 6 | Catalog Last Checked: May 05, 2026 at 07:39 PM

#8 Federal

Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for glacial till (gwava-dw_gtil)

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This data set represents the presence or absence of poorly sorted glacial till east of the Rocky Mountains in the conterminous United States. The data set was used as an input data layer for a...

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Search relevance: 1.00 | Views last month: 5 | Catalog Last Checked: May 05, 2026 at 10:14 PM

#9 Federal

Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for slope (gwava-s_slop)

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This data set represents soil surface slope, in percent times 1000, in the conterminous United States. The data set was used as an input data layer for a national model to predict nitrate...

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Search relevance: 1.00 | Views last month: 5 | Catalog Last Checked: May 05, 2026 at 08:34 PM

#10 Federal

Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for wetlands (gwava-s_wetl)

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This data set represents the percent of woody wetlands and emergent herbaceous wetlands land cover in the conterminous United States. The data set was used as an input data layer for a...

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xml

Search relevance: 1.00 | Views last month: 5 | Catalog Last Checked: May 05, 2026 at 08:49 PM

#11 Federal

Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for farmfertilizer (gwava-dw_ffer)

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This data set represents the average annual nitrogen input from commercial fertilizer applied to agricultural lands, 1992-2001, in kilograms per hectare, in the conterminous United States. The...

xml
xml

Search relevance: 1.00 | Views last month: 5 | Catalog Last Checked: May 05, 2026 at 09:47 PM

#12 Federal

Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for population density (gwava-dw_popd)

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This data set represents 1990 block group population density, in people per square kilometer, in the conterminous United States. This data set represents The data set was used as an input data...

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Search relevance: 1.00 | Views last month: 5 | Catalog Last Checked: May 05, 2026 at 09:00 PM

#13 Federal

Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for population density (gwava-s_popd)

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This data set represents 1990 block group population density, in people per square kilometer, in the conterminous United States. The data set was used as an input data layer for a national model...

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xml

Search relevance: 1.00 | Views last month: 5 | Catalog Last Checked: May 05, 2026 at 09:36 PM

#14 Federal

Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for clay sediment (gwava-s_clay)

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This data set represents the amount of clay sediment in the soil, in percent times 1000, in the conterminous United States. The data set was used as an input data layer for a national model to...

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xml

Search relevance: 1.00 | Views last month: 5 | Catalog Last Checked: May 05, 2026 at 09:44 PM

#15 Federal

Probability of nitrate contamination of recently recharged ground waters in the conterminous United States

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This data set is a national map of predicted probability of nitrate contamination of shallow ground waters based on a logistic regression (LR) model. The LR model was used to predict the...

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xml

Search relevance: 1.00 | Views last month: 5 | Catalog Last Checked: May 05, 2026 at 08:44 PM

#16 Federal

Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for fresh surface water withdrawal (gwava-s_swus)

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This data set represents the amount of fresh surface water withdrawal for irrigation, in megaliters per day, in the conterminous United States. The data set was used as an input data layer for a...

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xml

Search relevance: 1.00 | Views last month: 5 | Catalog Last Checked: May 05, 2026 at 08:02 PM

#17 Federal

Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for confined manure (gwava-s_conf)

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This data set represents the average annual nitrogen input from confined animal manure, 1992 and 1997, in kilograms per hectare, in the conterminous United States. The data set was used as an...

xml
xml

Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: May 05, 2026 at 09:44 PM

#18 Federal

Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for orchards/vineyards (gwava-dw_orvi)

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This data set represents the percent of orchards/vineyards land cover in the conterminous United States. The data set was used as an input data layer for a national model to predict nitrate...

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xml

Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: May 05, 2026 at 09:47 PM

#19 Federal

Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for sandstone and carbonate rocks (gwava-dw_sscb)

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This data set represents the presence or absence of sandstone and carbonate rock aquifers in the conterminous United States. The data set was used as an input data layer for a national model to...

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xml

Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: May 05, 2026 at 07:58 PM

#20 Federal

Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for irrigation tailwater recovery (gwava-dw_twre)

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This data set represents the area of National Resources Inventory irrigation system, tailwater recovery conservation practice, in square kilometers, in the conterminous United States. The data set...

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xml

Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: May 05, 2026 at 09:04 PM

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