View In:   ArcGIS JavaScript   ArcGIS Online Map Viewer   ArcGIS Earth   ArcGIS Pro

Service Description: <p>The aquifer risk map is being developed to fulfill requirements of SB-200 and is intended to help prioritize areas where domestic wells and state small water systems may be accessing groundwater that does not meet primary drinking water standards (maximum contaminant level or MCL). In accordance with SB-200, the risk map is to be made available to the public and is to be updated annually starting January 1, 2021. The Fund Expenditure Plan states the risk map will be used by Water Boards staff to help prioritize areas for available SAFER funding..</p><p>Methodology for the draft aquifer risk map <a href='https://gispublic.waterboards.ca.gov/portal/home/item.html?id=5f94cf5ca2a04f66a3dcfab29cf6c764' target='_blank'>available for download</a>.<br /></p><p>This layer shows declustered water quality data for arsenic, nitrate, 1,2,3-trichloropropane, per square mile section that was used to create the aquifer risk map required by SB-200. The intent of the aquifer risk map is to help prioritize areas where domestic well users and state small water systems may be accessing groundwater that does not meet primary drinking water standards (maximum contaminant level or MCL) and will be updated annually starting January 1, 2021. </p> <p>The section water quality data is based on depth-filtered water quality results from public and domestic supply wells, collected following a similar methodology as the <a href='https://gispublic.waterboards.ca.gov/portal/home/item.html?id=70feb9f4b00f4b3384a9a0bf89f9f18a'>Domestic Well Needs Assessment White Paper</a>. This layer contains the long-term average (20 years) as well as the count of recent results (within 2 years) above the MCL, between 80% - 100% of the MCL, and below 80% of the MCL for each square mile section. </p>

Map Name: Individual Chemicals

Legend

All Layers and Tables

Dynamic Legend

Dynamic All Layers

Layers:

• Nitrate Water Quality by Section (0)
• Uranium Water Quality by Section (1)
• TCP Water Quality by Section (2)
• Hexavalent Chromium Water Quality by Section (3)
• Arsenic Water Quality by Section (4)

Description:

Service Item Id: 7d53db6304954c77833c196353934d8d

Copyright Text: Created by Emily Houlihan (Emily.Houlihan@waterboards.ca.gov) and Dori Bellan (Dorian.Bellan@waterboards.ca.gov), geologists, GAMA Program.

Spatial Reference: 102100  (3857)  LatestVCSWkid(0)


Single Fused Map Cache: false

Initial Extent:

XMin: -1.3619923903855504E7
YMin: 4497808.133601373
XMax: -1.3355721322382158E7
YMax: 4572094.9230131935
Spatial Reference: 102100  (3857)  LatestVCSWkid(0)

Full Extent:

XMin: -1.3849212914200002E7
YMin: 3833616.076399997
XMax: -1.270505742E7
YMax: 5162452.7733
Spatial Reference: 102100  (3857)  LatestVCSWkid(0)

Units: esriMeters

Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP

Document Info:

Title: Map
Author:
Comments:
Subject:
Category:
Keywords: SB200,GAMA,SWRCB,groundwater
AntialiasingMode: Fast
TextAntialiasingMode: Force

Supports Dynamic Layers: true

MaxRecordCount: 160000

MaxSelectionCount: 2000

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   Dynamic Layer

Supported Operations:   Export Map   Identify   QueryLegends   QueryDomains   Find   Return Updates