View In:
ArcGIS JavaScript
ArcGIS Online map viewer
ArcGIS Earth
ArcMap
ArcGIS Pro
View Footprint In:
ArcGIS Online map viewer
Service Description: This layer depicts the official TCEQ Poly Assessment Units (AU) for the State of Texasas listed in Title 30, Chapter 307 of the Texas Administrative Code (TAC), also known asthe Texas Surface Water Quality Standards. Assessment Units are sub-areas of segments,defined as the smallest geographic area of use support reported in the assessment.These are reservoirs, estuaries, oyster waters, beaches, and ocean that have been individuallydefined by the TCEQand assigned unique identification numbers. Intended to have relatively homogeneouschemical, physical, and hydrological characteristics, an AU provides a basic unit for assigningsite-specific standards and for applying water quality management programs of the agency.AU's from both "classified" and "unclassified" segments have been included in this layer.Classifiedsegments, also referred to as designated segments, refer to water bodies that areprotected by site- specific criteria. The classified segments are listed and described inAppendix A and C of Chapter 307.10. The site-specific uses and criteria are described inAppendix A. Classified waters include most rivers and their major tributaries, majorreservoirs, and estuaries. Unclassified waters are those smaller water bodies that do nothave site-specific water quality standards assigned to them, but instead are protected bygeneral standards that apply to all surface waters in the state.This layer also indentifies which AUs and water bodies have been assessed in the2014 Texas Integrated Report for Clean Water Act Sections 305 (b) and 303 (d).An impaired AU is included in Categories 4 and 5. Category 4 includesimpairments that are not suitable for a TMDL or for which a TMDL has already beenapproved. Category 5 includes impairments which may be suitable for development of a TMDLand comprise the 303 (d) List. Uploaded to SARA GIS Library on 2/15/2018
Map Name: Layers
Legend
All Layers and Tables
Layers:
Tables:
Description:
Copyright Text: TCEQ Surface Water Quality Monitoring Program
Spatial Reference:
102740
(2278)
Single Fused Map Cache: false
Initial Extent:
XMin: 1956924.5885175548
YMin: 1.36795966793738E7
XMax: 2208308.972132302
YMax: 1.3817198986872215E7
Spatial Reference: 102740
(2278)
Full Extent:
XMin: 1968351.1514091343
YMin: 1.3635615359517306E7
XMax: 2196882.4092407227
YMax: 1.3790875934494227E7
Spatial Reference: 102740
(2278)
Units: esriFeet
Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP
Document Info:
Title:
Author:
Comments: This layer depicts the official TCEQ Poly Assessment Units (AU) for the State of Texasas listed in Title 30, Chapter 307 of the Texas Administrative Code (TAC), also known asthe Texas Surface Water Quality Standards. Assessment Units are sub-areas of segments,defined as the smallest geographic area of use support reported in the assessment.These are reservoirs, estuaries, oyster waters, beaches, and ocean that have been individuallydefined by the TCEQand assigned unique identification numbers. Intended to have relatively homogeneouschemical, physical, and hydrological characteristics, an AU provides a basic unit for assigningsite-specific standards and for applying water quality management programs of the agency.AU's from both "classified" and "unclassified" segments have been included in this layer.Classifiedsegments, also referred to as designated segments, refer to water bodies that areprotected by site- specific criteria. The classified segments are listed and described inAppendix A and C of Chapter 307.10. The site-specific uses and criteria are described inAppendix A. Classified waters include most rivers and their major tributaries, majorreservoirs, and estuaries. Unclassified waters are those smaller water bodies that do nothave site-specific water quality standards assigned to them, but instead are protected bygeneral standards that apply to all surface waters in the state.This layer also indentifies which AUs and water bodies have been assessed in the2014 Texas Integrated Report for Clean Water Act Sections 305 (b) and 303 (d).An impaired AU is included in Categories 4 and 5. Category 4 includesimpairments that are not suitable for a TMDL or for which a TMDL has already beenapproved. Category 5 includes impairments which may be suitable for development of a TMDLand comprise the 303 (d) List. Uploaded to SARA GIS Library on 2/15/2018
Subject: General purpose use; to support agency-wide policy decisions regarding surface water quality in the State of Texas. Due to the various scales inherent from using multiple sources in the
creation of
this dataset, this layer should not be used for
Category:
Keywords: Reservoir,Estuary,Oyster Water,Beach,Ocean,Classified,Unclassified,AU Assessment,Polygon,TCEQ
AntialiasingMode: None
TextAntialiasingMode: Force
Supports Dynamic Layers: false
Resampling: false
MaxRecordCount: 1000
MaxImageHeight: 4096
MaxImageWidth: 4096
Supported Query Formats: JSON, geoJSON, PBF
Supports Query Data Elements: true
Min Scale: 0
Max Scale: 0
Supports Datum Transformation: true
Child Resources:
Info
Supported Operations:
Export Map
Identify
QueryLegends
QueryDomains
Find
Return Updates