Layer: STREAMS IMPAIRED 2018 AGOL (ID:1)

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Name: STREAMS IMPAIRED 2018 AGOL

Display Field: Name

Type: Feature Layer

Geometry Type: esriGeometryPolyline

Description: This is a static dataset representing the Arizona streams that were classified as impaired for the 2018 Water Quality Assessment Reports. In this context, "Impaired" corresponds with Categories 4 and 5 below. Dataset is owned by the Surface Water Quality Improvement Section. Per the EPA, "Every two years states are required to submit Water Quality Assessment Reports under Sections 305(b) and 303(d) of the Clean Water Act describing the condition of waters in the state. Waters are assessed as impaired when an applicable water quality standard is not being attained. Impaired waters require a total maximum daily load (TMDL) or alternative restoration plan to reduce pollutant loadings and restore the waterbody." Attributes in this dataset indicate which of the following assessment categories each waterbody is listed:Category 1 – Attaining all designated usesCategory 2 – Attaining some designated uses, and insufficient or no data information to determine if remaining uses are attainedCategory 3 – Insufficient or no data and information to determine if any use is attainedCategory 4- Impaired or threatened for one or more uses but not needing a TMDL because –a) TMDL has been completedb) Expected to meet standardsc) Not impaired by a pollutantCategory 5 – Impaired or threatened by pollutant(s) for one or more designated uses and requiring a TMDL. These are the waters entered onto a states’ 303(d) list.Data provided in this indicator help demonstrate:The extent to which a state is assessing its waters for nutrient-related parameters,The extent of nitrogen and phosphorus pollution in the state, andThe extent to which the state is working towards restoring nutrient-impaired waters by developing TMDLs or alternative restoration plans.For more information see: https://www.epa.gov/nutrientpollution/waters-assessed-impaired-due-nutrient-related-causes

Copyright Text: Arizona Department of Environmental Quality (ADEQ), Water Quality Division, US Environmental Protection Agency (EPA)

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Max Record Count: 2000

Supported query Formats: JSON, geoJSON, PBF

Use Standardized Queries: True

Extent:

Drawing Info:

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Object ID Field: OBJECTID

Unique ID Field:

Global ID Field: GLOBALID

Type ID Field: CATEGORY_D

Fields:

OBJECTID (type: esriFieldTypeOID, alias: OBJECTID, SQL Type: sqlTypeOther, length: 0, nullable: false, editable: false)
WBID (type: esriFieldTypeString, alias: WBID, SQL Type: sqlTypeOther, length: 18, nullable: true, editable: true)
NAME (type: esriFieldTypeString, alias: Name, SQL Type: sqlTypeOther, length: 254, nullable: true, editable: true)
SWQS_TYPE (type: esriFieldTypeString, alias: SWQS_TYPE, SQL Type: sqlTypeOther, length: 1, nullable: true, editable: true)
CATEGORY (type: esriFieldTypeString, alias: CATEGORY, SQL Type: sqlTypeOther, length: 30, nullable: true, editable: true)
CATEGORY_D (type: esriFieldTypeString, alias: CATEGORY_D, SQL Type: sqlTypeOther, length: 200, nullable: true, editable: true)
IMPAIRMENT (type: esriFieldTypeString, alias: IMPAIRMENT, SQL Type: sqlTypeOther, length: 254, nullable: true, editable: true)
STATUS_2016_ASSESS (type: esriFieldTypeString, alias: Status_2016_Assess, SQL Type: sqlTypeOther, length: 75, nullable: true, editable: true)
GLOBALID (type: esriFieldTypeGlobalID, alias: GLOBALID, SQL Type: sqlTypeOther, length: 38, nullable: false, editable: false)
Shape__Length (type: esriFieldTypeDouble, alias: Shape__Length, SQL Type: sqlTypeDouble, nullable: true, editable: false)

Types:

CATEGORY_D: Impaired

CATEGORY_D: Not Attaining

CATEGORY_D: Not Attaining/Impaired

Is Data Versioned: false

Has Contingent Values: false

Supports Rollback On Failure Parameter: true

Last Edit Date: 6/13/2026 3:30:06 PM

Schema Last Edit Date: 6/13/2026 3:30:06 PM

Data Last Edit Date: 6/13/2026 3:30:06 PM

Supported Operations: Query Query Pivot Query Top Features Query Analytic Query Bins Generate Renderer Validate SQL Get Estimates ConvertFormat