Nitrate Priority Areas of Idaho (2002)
Shapefile - nitrprio_id_ideq
FGDC, ESRI Metadata
Show Definitions
Description | Spatial | Data Structure | Data Quality | Data Source | Data Distribution | Metadata
Description
Citation
Information used to reference the data.
Title: Nitrate Priority Areas of Idaho (2002)
Originators: Idaho Department of Environmental Quality
Publisher: Idaho Department of Environmental Quality
Publication place: Boise, ID USA
Publication date: 20020123
Data type: vector digital data
Other citation details:
http://www.deq.state.id.us/water/prog_issues/ground_water/nitrate.cfm
Description
A characterization of the data, including its intended use and limitations.
Abstract:
This data set was developed by the Idaho Department of Environmental Quality (DEQ) to represents the group 1 nitrate priority areas with in the state of Idaho.  The data was developed utilizing 1999 and 2000 Public Water System groundwater samples, and the most recent statewide monitoring network, Idaho Department of Agriculture, United State Geological Survey, and Idaho Department of Environmental Quality local and regional monitoring project anylitical data.
Purpose:
This data set was developed for use with ground water and drinking water environmental concerns.
Supplemental information:
Although the quality of ground water in Idaho is generally good, ground water quality monitoring shows that in specific areas of the state, Idaho's ground water has been significantly degraded. This localized degradation negatively impacts water quality and potentially threatens domestic water supplies, aquaculture, agriculture, mining, industrial, and other ground water beneficial uses. 

Nitrate is one of the contaminants responsible for this degradation and is one of the most widespread ground water contaminants in Idaho. Nitrate is a form of nitrogen, an element whose compounds are vital components of foods and fertilizers. It is an essential nutrient for plant growth. Nitrate comes from a variety of sources, such as plants and other organic matter that return nitrate to the soil as they decompose. Septic sewer systems, waste from animal feedlots, and nitrogen-based fertilizers also discharge nitrates to the environment. 

Nitrate that is not used by plants can build up in and move through the soil. Precipitation, irrigation, and sandy soils allow nitrate to move around and find its way into surface water and ground water. 

While nitrate is just one of the potential ground water contaminants in Idaho, more is known about nitrate in ground water in Idaho than other contaminants. In addition, the presence of nitrate is a good indicator of other potential water quality problems. 
Dataset credit:
USGS, IDDEQ
Language of dataset: en
Point Of Contact
Contact information for the individual or organization that is knowledgeable about the data.
Organization: Idaho Department of Environmental Quality
Person: Tonia Mitchell
Position: Groundwater Mgr
Phone: 1-208-373-0250
Fax: 1-208-373-0143
Email: tmitchel@deq.state.id.us
Address type: mailing and physical address
Address:
1410 North Hilton
City: Boise
State or Province: Idaho
Postal code: 83706-1255
County: USA
Data Type
How the data are represented, formatted and maintained by the data producing organization.
File or table name: nitrprio_id_ideq
Data type: vector digital data
Data format: Shapefile
Native dataset environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535
Time Period of Data
Time period(s) for which the data corresponds to the currentness reference.
Date: 20000130
Currentness reference:
20000130
Status
The state of and maintenance information for the data.
Data status: Complete
Update frequency: Unknown
Key Words
Words or phrases that summarize certain aspects of the data.
Theme:
Keywords: groundwater, nitrate, water contamination, water pollution
Keyword thesaurus: groundwater Nitrates
Theme:
Keywords: environment
Keyword thesaurus: ISO 19115 Topic Category
Place:
Keywords: Idaho, Pacific Northwest, Idaho
Keyword thesaurus: None
Data Access Constraints
Restrictions and legal prerequisites for accessing or using the data after access is granted.
Access constraints:
None
Use constraints:
Restriction of Liability, Scale and method of delineation.
Cross Reference
Information about other, related data sets that are likely to be of interest.
Title: Nitrate Priority Areas withing Idaho's groundwater.
Other citation details:
http://www.deq.state.id.us/water/prog_issues/ground_water/nitrate.cfm
Spatial Reference Information
Horizontal Coordinate System
Reference system from which linear or angular quantities are measured and assigned to the position that a point occupies.
Projected coordinate system:
Name: IDTM83
Map units: meters
Geographic coordinate system:
Name: GCS North American 1983
Coordinate System Details
Map projection
Map projection name: Transverse Mercator
Scale factor at central meridian: 0.999600
Longitude of central meridian: -114.000000
Latitude of projection origin: 42.000000
False easting: 2500000.000000
False northing: 1200000.000000
Planar Coordinate Information
Planar coordinate encoding method: coordinate pair
Coordinate representation:
Abscissa resolution: 0.001024
Ordinate resolution: 0.001024
Planar distance units: meters
Geodetic model
Horizontal datum name: North American Datum of 1983
Ellipsoid name: Geodetic Reference System 80
Semi-major axis: 6378137.000000
Denominator of flattening ratio: 298.257222
Vertical Coordinate System
Reference system from which vertical distances (altitudes or depths) are measured.
Altitude system definition:
Altitude resolution: 1.000000
Altitude encoding method: Explicit elevation coordinate included with horizontal coordinates
Spatial Domain
The geographic areal domain of the data that describes the western, eastern, northern, and southern geographic limits of data coverage.
Bounding Coordinates
In Projected or local coordinates
IDTM83
Boundary Coordinate
Left 2251719.000000 (meters)
Right 2729862.000000 (meters)
Top 1714564.000000 (meters)
Bottom 1202088.000000 (meters)
In Unprojected coordinates (geographic)
GCS North American 1983
Boundary Coordinate
West -117.240944 (longitude)
East -110.999140 (longitude)
North 46.632623 (latitude)
South 41.979671 (latitude)
Data Structure and Attribute Information
Overview
Summary of the information content of the data, including other references to complete descriptions of entity types, attributes, and attribute values for the data.
Dataset overview:
Spatial location of potential exceedence area of nitrate concentrations in groundwater aquifers
Direct spatial reference method: Vector
Attributes of nitrprio_id_ideq
Detailed descriptions of entity type, attributes, and attribute values for the data.
Name: nitrprio_id_ideq
Type of object: Feature Class
Geometry type: Polygon
Number of records: 25
Attributes
TREND_AREA
Definition:
Feature geometry.
Alias: TREND_AREA Type: Double Width: 8 Precision: 24 Scale: 5
Attribute values: Coordinates defining the features.
Attribute definition source:
ESRI
SCORE
Definition:
These are just a random numerical assignment to the Group 1 Nitrate Priority Areas during the 1998 ranking.  Originally in 1998 there were 33 areas.  In 2001 areas have been combined into a total of 25 areas.  These randomly numbered areas were used for the initial data compilation and trend analysis.
Alias: SCORE Type: Double Width: 8 Number of decimals: 5 Precision: 24 Scale: 5
RANKED_PRI
Definition:
A point total of Group 1 Nitrate ranking factors that includes the following: A population sub-score,  a water quality sub-score, a trend sub-score, and an other beneficial use sub-score (other than drinking water - aquiculture)
Alias: RANKED_PRI Type: Number Width: 19 Number of decimals: 5
NAME
Definition:
Scores are then given a numerical rank in order of degradation (#1 being the most degraded, #25 being the least degraded)
Alias: NAME Type: Number Width: 19 Number of decimals: 5
DATASRC
Definition:
Generally refers to geographic area or hydrogeologic system.
Alias: DATASRC Type: Number Width: 19 Number of decimals: 5
REGION
Definition:
This is where the analytical results come from the type of monitoring
Alias: REGION Type: String Width: 254
Attribute domain values
Value Definition
SMN
Statewide Monitoring Network
PWS
Public Water Systems (DEQ's Drinking Water Management Information System - DWIMS)
RLM
Regional/Local Monitoring Projects, DEQ, IDAG (Idaho Dept. of Ag, dairy & monitoring     projects), and includes agency cooperative projects such as DEQ & IDAG; DEQ & USGS 
POPEST
Definition:
DEQ regional office areas, NC is north-central or Lewiston Reg. Office, SW is southwest or Boise Reg. Office, SC is south-central or Twin Fall Region, SE is Pocatello and E is Idaho Falls
Alias: POPEST Type: String Width: 254
ACRES
Definition:
A population estimate.
Alias: ACRES Type: String Width: 254
TOTAL_WELL
Definition:
Calculated in ArcView.
Alias: TOTAL_WELL Type: String Width: 254
SAMPLE_10
Definition:
The total number of ground water samples.
Alias: SAMPLE_10 Type: Number Width: 19 Number of decimals: 5
SAMPLE_5_9
Definition:
A number of samples that exceed the MCL (maximum contaminant level) of 10 mg/l for NO3.
Alias: SAMPLE_5_9 Type: Number Width: 19 Number of decimals: 5
SAMPLE_2_4
Definition:
The number of samples whose analyses are in the range 5 - 9.999 (mg/l).
Alias: SAMPLE_2_4 Type: Number Width: 19 Number of decimals: 5
SAMPLE__2
Definition:
The number of samples whose analyses are in the range 2 - 4.999 (mg/l).
Alias: SAMPLE__2 Type: Number Width: 19 Number of decimals: 5
TOTAL_PWS
Definition:
the number of samples whose analyses are below 2 mg/l
Alias: TOTAL_PWS Type: Number Width: 19 Number of decimals: 5
TREND
Definition:
The land use that constitutes the majority by area.
Alias: TREND Type: Number Width: 19 Number of decimals: 5
FID
Definition:
Internal feature number.
Alias: FID Type: Number Width: 19 Number of decimals: 5
Attribute values: Sequential unique whole numbers that are automatically generated.
Attribute definition source:
ESRI
LAND_USE
Definition:
The number of public water system wells sampled.
Alias: LAND_USE Type: String Width: 254
SHAPE
Definition:
Either increasing, decreasing or no discernable trend (PROVISIONAL USGS information)
Alias: Shape Type: String Width: 254
Attribute values: Coordinates defining the features.
Attribute definition source:
ESRI
Shape
Definition:
Feature geometry.
Alias: Shape Type: Float Width: 19 Number of decimals: 11
Attribute values: Coordinates defining the features.
Attribute definition source:
ESRI
SHAPE_area
Definition:
Area of feature in internal units squared.
Alias: SHAPE_area Type: Float Width: 19 Number of decimals: 11
Attribute values: Positive real numbers that are automatically generated.
Attribute definition source:
ESRI
SHAPE_len
Alias: SHAPE_len Type: Double Width: 19 Precision: 18 Scale: 11
ESRI Feature Description
Description of spatial objects in the data using the Environmental Systems Research Institute (ESRI) terminology.
Environmental Systems Research Institute (ESRI) terms
nitrprio_id_ideq
ESRI feature type: Simple
Geometry type: Polygon
Topology: FALSE
Feature count: 25
Spatial index: TRUE
Linear referencing: FALSE
SDTS Feature Description
Description of point and vector spatial objects in the data using the Spatial Data Transfer Standards (SDTS) terminology.
Spatial data transfer standard (SDTS) terms
nitrprio_id_ideq
Type: G-polygon
Count: 25
Data Quality and Accuracy Information
General
Information about the fidelity of relationships, data quality and accuracy tests, omissions, selection criteria, generalization, and definitions used to derive the data.
Logical consistency report:
This data set was developed as a shapefile, therefor no topology was built or checked.  
Completeness report:
Currently undergoing public comment.  After the comment period the data will undergo an annual review.
Attribute Accuracy
Accuracy of the identification of data entities, features and assignment of attribute values.
Attribute accuracy report:
Unknown
Data Source and Process Information
Data Sources
Information about the source data used to construct or derive the data.
Data source information
Data Source 1
Map scale denominator: 1:250,000
Process Steps
Information about events, parameters, tolerances and techniques applied to construct or derive the data.
Process step information
Process Step 1
Process description:
The locations and water quality data of wells and springs where ground water samples were collected have been incorporated into Geographic Information System (GIS) coverages. The ground water samples include Public Drinking Water Systems (PWS); the Statewide Monitoring Network (SMN); Idaho Department of Agriculture (IDAG) studies (dairy and other); and regional/local monitoring projects of private drinking water ground water sources conducted by IDEQ (Idaho Department of Environmental Quality) and other agencies. Data (PWS) are maintained by IDEQ. The Idaho Department of Water Resources (IDWR) and the U.S. Geological Survey (USGS) maintain the SMN data. The GIS coverages were classified into concentration ranges. In clusters where ground water samples showed nitrate levels over natural or background conditions, areas were delineated around the clusters incorporating considerations such as hydrogeologic units and land use.The criterion for Group 1 Nitrate Priority Areas is that at least 25% of the wells sampled within the area exceed 5-milligrams/liter (mg/l) nitrate. This is one-half of the maximum contaminant level of 10- milligrams/liter nitrate, considered evidence of significant degradation. The upper limit for natural occurring (background) concentrations of nitrate is considered to be about 2 mg/l.
The ranking process was finalized in June 2001, following a public comment period, and includes1999 and 2000 analytical data (www2.state.id.us/deq/water/gw/nitrate/nitrate_ranking.htm,
www2.state.id.us/deq/water/gw/nitrate/Ranking_Final.pdf). For (PWS), the highest value from the most recent analysis was used. Anomalous or inconsistent values were not considered. The reporting period for PWS was limited to the years of 1999-2000, and attempts were made to select analysis consistent with the sampling period of the SMN, which is between the months of May through September. For the SMN, regional/local monitoring, and IDAG data sources, the most recent value was selected. the reporting period in years for such wells is variable, yet sampling periods are usually between the months of May through September. Well use in the SMN includes domestic (68%), irrigation (19%),
public (6%), stock (4%), commercial and industrial (2%), and other (1%) such as recreation, aquaculture, de-watering, and unused. Numerous studies conducted by the USGS are included in the SMN. Wells in regional/local monitoring projects are used for domestic purposes, and wells in IDAG projects include domestic and dairy use. Every attempt was made to eliminate duplicate sample sites of multi-agency studies by comparison of latitude and longitude. There may be some
minor duplication due to variances in calibration of global positioning systems (GPS); however, the most recent analysis was used.

The SMN consists of a total of 1,553 monitoring sites. One hundred sites are monitored on a yearly basis. An additional 300 sites per year are sampled on four-year cycles. In 2001, IDWR plans to add additional sites with a five-year sampling frequency. Public Water System wells are sampled several
times each year and regional/local monitoring projects are irregular in sampling frequency. Details of the ranking/scoring system can be found at
www2.state.id.us/deq/water/gw/nitrate/Ranking_Final.pdf
Person: Toni Mitchell
Organization: Idaho Department of Environmental Quality
Phone: 1-208-373-0250
Fax: 1-208-373-0143
Email: tmitchel@deq.state.id.us
Process date: 2001/2002
Process software and version: Arcview 3.2
Process Step 2
Process description:
Dataset copied.
Data Source used
Server=gis-boi-1; Service=esri_sde; Database=deqgis83; User=gisadmin; Version=sde.DEFAULT
Process Step 3
Process description:
Metadata imported.
Data Source used
D:\WorkSpace\InsideIdaho\NitratePrior1.xml
ESRI geoprocessing history
Description of ESRI geoprocessing commands, settings, and tolerances applied to the data.
ESRI geoprocessing command information
1 Process
Date: 20040608 Time: 101157
Tool location: d:\ArcGIS\ArcToolbox\Toolboxes\Data Management Tools.tbx\CopyFeatures
Command issued: CopyFeatures "Database Connections\GISADMIN-DEQGIS83.sde\deqgis83.DBO.GroundWater_Waste\deqgis83.DBO.NitratePrior1" "Database Connections\GISADMIN_TO_GISBOI2.sde\deqgis83.DBO.GroundWater_Waste\deqgis83.DBO.deqgis83_DBO_NitratePrior1" # 0 0 0
Data Distribution Information
General
Description of the data known by the party from whom the data may be obtained, liability of party distributing data, and technical capabilities required to use the data.
Resource description:
Idaho Nitrate Priority Areas within groundwater.
Distribution liability:
Neither the State of Idaho nor the Idaho Department of Environmental Quality, nor any of their employees make any warranty, express or implied, or assume any legal liability or responsibility for the accuracy, completeness or usefulness of any information or data provided.  Metadata is provided for all data sets, and no data should be used without first reading and understanding its limitations. The data could include technical inaccuracies or typographical errors. The Department of Environmental Quality may update, modify, or revise the data used at any time, without notice. 
Distribution Point of Contact
Contact information for the individual or organization distributing the data.
Organization: Idaho Department of Environmental Quality
Person: Sean Coyle
Position: GIS Anlayst
Phone: 1-208-373-0573
Fax: 1-208-373-0143
Email: sean.coyle@deq.idaho.gov
Hours of service: 8:00 - 5:00 MT
Address type: mailing and physical address
Address:
1410 N Hilton
City: Boise
State or Province: Idaho
Postal code: 83706-1255
County: USA
Standard Order Process
Common ways in which data may be obtained.
Digital form:
Format name: ESRI Shapefile (.shp)
Size of the data: 0.391
Transfer size: 0.391
Digital transfer option:
Online option:
Available Time Period
Time when data is available from the distributer.
Date: 20000123
Metadata Reference
Metadata Date
Dates associated with creating, updating and reviewing the metadata.
Last updated: 20100706
Language of metadata: en
Metadata Point of Contact
Contact information for the individual or organization responsible for the metadata information.
Organization: Idaho Department of Environmental Quality
Person: Sean Coyle
Position: GIS Analyst
Phone: 1-208-373-0502
Fax: 1-208-373-0143
Email: scoyle@deq.state.id.us
Address type: mailing and physical address
Address:
1410 North Hilton
City: Boise
State or Province: Idaho
Postal code: 83706-1255
County: USA
Metadata Standards
Description of the metadata standard used to document the data and reference to any additional extended profiles to the standard used by the metadata producer.
Standard name: FGDC Content Standards for Digital Geospatial Metadata
Standard version: FGDC-STD-001-1998
Time convention: local time
Metadata profiles defining additonal information:
Profile: ESRI Metadata Profile
FGDC Plus Metadata Stylesheet
Stylesheet: FGDC Plus Stylesheet
File name: FGDC Plus.xsl
Version: 2.0
Description: This metadata is displayed using the FGDC Plus Stylesheet, which is an XSL template that can be used with ArcGIS software to display metadata. It displays metadata elements defined in the Content Standard for Digital Geospatial Metadata (CSDGM) - aka FGDC Standard, the ESRI Profile of CSDGM, the Biological Data Profile of CSDGM, and the Shoreline Data Profile of CSDGM. CSDGM is the US Federal Metadata standard. The Federal Geographic Data Committee originally adopted the CSDGM in 1994 and revised it in 1998. According to Executive Order 12096 all Federal agencies are ordered to use this standard to document geospatial data created as of January, 1995. The standard is often referred to as the FGDC Metadata Standard and has been implemented beyond the federal level with State and local governments adopting the metadata standard as well. The Biological Data Profile broadens the application of the CSDGM so that it is more easily applied to biological data that are not explicitly geographic (laboratory results, field notes, specimen collections, research reports) but can be associated with a geographic location. Includes taxonomical vocabulary. The Shoreline Data Profile addresses variability in the definition and mapping of shorelines by providing a standardized set of terms and data elements required to support metadata for shoreline and coastal data sets. The FGDC Plus Stylesheet includes the Dublin Core Metadata Element Set. It supports W3C DOM compatible browsers such as IE7, IE6, Netscape 7, and Mozilla Firefox. It is in the public domain and may be freely used, modified, and redistributed. It is provided "AS-IS" without warranty or technical support.
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