This data represents the 2002 Integrated Report final assessment results for metals in non-tidal rivers. The assessments are based on data from the NJDEP Ambient Surface Water Monitoring Network (ASMN) and NJDEP 303d Evaluation Monitoring. The following metals were evaluated: arsenic, cadmium, chromium, copper, lead, mercury, nickel, selenium, silver, thallium, and zinc.
This data spatially represents the assessment results for metals in non-tidal rivers. This coverage depicts spatial extent by associating a single sampling point to a river stretch and applying the assessment results to the waterbody. The methods used for the final results are explained in the NJDEP document, "Integrated Water Quality Monitoring and Assessment Methods." Toxic Water Quality Parameters Assessments - Section 4.2 Spatial Extent Assessment Methods - Section 6
Historically, data assessed for metal impairments in freshwaters were generated primarily from the 1990 Assessment of Waters Impaired by Toxic Pollutants (NJDEP, 1990) also known as the 304(l) List; and, to a lesser extent, the NJDEP-USGS Cooperative Ambient Stream Monitoring Network (ASMN). Since many waterbodies had data based on water quality and effluent data collected in the early and mid-1980's, the need to reassess water quality for metals has been a high priority issue. In order to address this need, data collection commenced in 1998 with the 303d Evaluation Monitoring Network, as well as, continued data collection in the ASMN and Redesigned ASMN. These data have provided much needed information in the determination of the status of metals in the state's waterways. Go to http://www.state.nj.us/dep/wmm/sgwqt/wat/integratedlist/integratedlist.htm for more information on the Integrated Report.
publication date
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Waterbody linework based on EPA Reach File Version 3.0 (RF3).
Linework is the EPA Reach File 3.0 (RF3) hydrographic database. Assessment results were imported from NJDEP Water Assessment Team's data files of metal assessment results, and included verification check with approximately 75% of the entries.
Checked for duplicate segments, undershoots, and overshoots.
Blank entries for assessment results indicates unassessed parameters.
RF3 linework +- 35 ft
NA
RF3 used as the basis for linework.
EPA RF3 used as the base linework for the hydrography. The following edits were completed to improve and simplify the linework: a) lakes are represented by only one segment, one shoreline was deleted while the remaining shoreline represents lake as one line; b) canals of cranberry bogs were deleted (these are used for irrigation); c) type of waterbody (river, lake, canal) attribute was extensively edited based on NJDEP lakes, 1985 Land Use/Cover, and 1:24,000 hydrography coverages; d) added stream segments where sampling sites are located using 1:24,000 hydrography coverage; e) connected isolated stream segments if 1:24000 hydrography coverage showed a connection with rivers; and f) corrected river names. The assessment results were imported from the Water Assessment Team's data files and joined with the shapefile using the Station ID as the common attribute. Some river segments had to be split and new RF3 Reach IDs generated under the following circumstances: a) metal spatial extent ended before the termination node of the river reach (occurred mostly when two sampling sites on same RF3 stream reach); b) tidal area split a river reach; or c) a lake not depicted on the original RF3 coverage was corrected on the linework. Intersected coverage with watershed management area and HUC 11 coverages to identify which watershed management, HUC 11, HUC 8, and region stream segment located. SEE the document "Integrated Water Quality Monitoring and Assessment Methods" for the description of the spatial extent method.
Internal feature number.
ESRI
Feature geometry.
ESRI
Length of River Segment - length in feet
ESRI
RF3 Identification Number - each waterbody segment assigned a unique ID.
USEPA RF3 Hydrography Database
NJDEP 11 Digit Hydrologic Unit Code - identifies the HUC 11 the segment is located.
NJDEP 11 Digit Hydrologic Unit Code delineations for New Jersey (DEPHUC11)
HUC 11 Name
NJDEP 11 Digit Hydrologic Unit Code delineations for New Jersey (DEPHUC11)
Watershed Management Area - identifies the WMA the segment is located.
NJDEP Watershed Management Areas in New Jersey
Watershed Management Area Name
NJDEP Watershed Management Areas in New Jersey
Region Code - identifies the region the segment is located.
NJDEP 11 Digit Hydrologic Unit Code delineations for New Jersey (DEPHUC11)
Region Name
NJDEP 11 Digit Hydrologic Unit Code delineations for New Jersey (DEPHUC11)
8 Digit Hydrologic Unit Code - identifies the HUC 8 the segment is located.
NJDEP 11 Digit Hydrologic Unit Code delineations for New Jersey (DEPHUC11)
Tributary Name - name of river, more detailed than River Name
USEPA Reach File Version 3.0, NJDEP 1:24,000 hydrography
Site Number of NJDEP/USGS Ambient Surface Water Monitoring Network (ASMN) Station. If no site at this location than blank.
NJDEP
Site Name of ASMN Station
NJDEP
Site Name of 303d Evaluation Monitoring Station.
NJDEP
Water year samples taken
NJDEP
Estimated assessment, extrapolated assessment based on monitored waters.
NJDEP
Assessment Results for Arsenic
NJDEP
Metal fully attains standards
NJDEP
Metal does not attain standards; criteria exceeded
NJDEP
Data is not sufficient to make an assessment
NJDEP
Assessment Results for Cadmium
NJDEP
see Attribute Values for Arsenic
NJDEP
Assessment Results for Chromium
NJDEP
see Attribute Values for Arsenic
NJDEP
Assessment Results for Copper
NJDEP
see Attribute Values for Arsenic
NJDEP
Assessment Results for Lead
NJDEP
see Attribute Values for Arsenic
NJDEP
Assessment Results for Mercury
NJDEP
see Attribute Values for Arsenic
NJDEP
Assessment Results for Nickel
NJDEP
see Attribute Values for Arsenic
NJDEP
Assessment Results for Selenium
NJDEP
see Attribute Values for Arsenic
NJDEP
Assessment Results for Silver
NJDEP
see Attribute Values for Arsenic
NJDEP
Assessment Results for Thallium
NJDEP
see Attribute Values for Arsenic
NJDEP
Assessment Results for Zinc
NJDEP
see Attribute Values for Arsenic
NJDEP
Other Metals that exceed standards
NJDEP
Other toxics that are carried over from the 1998 303(d) List
NJDEP
Metals Listed on the 1998 303(d) List
NJDEP
Elements are represented by symbol instead of name
NJDEP
Comments - additional information about assessments or other data
NJDEP
Type of Waterbody
USEPA Reach File Version 3.0
River or Stream
USEPA
Wide River
USEPA
Lake
USEPA
River Name - name of river system the segment is located.
USEPA Reach File Version 3.0, NJDEP 1:24,000 hydrography
Site Name for 303d Evaluation Monitoring Network Station.
NJDEP
Data Source - name of sampling network the data assessment is based upon.
NJDEP
303d Evaluation Monitoring Network
NJDEP
Background Station part of the ASMN
NJDEP
Statewide Status Station part of the ASMN
NJDEP
Overall metal assessment result, incorporating all of the metals.
NJDEP
Overall metal assessment result.
NJDEP
Calculated River Segment Length - length converted to miles and based on type of waterbody
NJDEP
Lakes are not calculated in total river miles, see Lakes Coverage for assessments
NJDEP
Wide rivers were divided by 2 to prevent double counting of river miles
NJDEP
River or stream calculated from length of river segment.
NJDEP
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