Groundwater Data Summaries

Below are a number of yearly data summaries done using the Department's Groundwater Retrieval Network (GRN) system . (see description of GRN at the bottom of this page)

If you would like to do your own data retrievals against much of the Department's groundwater data, you can use the Groundwater Retrieval Network (GRN) on the world web. See the discussion at the bottom of the page for more information on the GRN system.

The following report pairs represent a single yearly data extract using GRN, with each report sorted using a different criteria.

• Summary of All Sampling Data Reportable through the GRN System for January - December 2001 - Sorted by the Parameter Description Column. (PDF - 73KB)



• Summary of All Sampling Data With an NR140 Groundwater Standard Reportable through the GRN System for January - December 2001 - Sorted by the Parameter Description Column. (PDF - 57KB)

• Summary of All Sampling Data Reportable through the GRN System for January - December 2000 - Sorted by the Parameter Description Column. (PDF - 78 KB)



• Summary of All Sampling Data With an NR140 Groundwater Standard Reportable through the GRN System for January - December 2000 - Sorted by the Parameter Description Column. (PDF - 57KB)

• Summary of Detects Only Sampling Data Reportable through the GRN System for January - December 1999 - Sorted by the Parameter Description column in the summary report.



• Summary of All Sampling Data With an NR140 Groundwater Standard Reportable through the GRN System for January - December 1999 - Sorted by the Wells With an ES Exceedance column in the summary report.

• Summary of All Sampling Data Reportable through the GRN System for January - December 1998 - Sorted by the Wells With Detects column in the summary report.



• Summary of All Sampling Data Reportable through the GRN System for January - December 1998 - Sorted by the Parameter Description column in the summary report.

• Summary of All Sampling Data Reportable through the GRN System for January - December 1997 - Sorted by the WELLS WITH DETECTS column in the summary report.



• Summary of The Top 100 Parameters Detected - Reportable through the GRN System for January - December 1997 - Sorted by the WELLS WITH DETECTS column in the summary report.

• Summary of All Sampling Data Reportable through the GRN System for January - December 1996 - Sorted by the WELLS WITH DETECTS column in the summary report.



• Summary of All Sampling Data Reportable through the GRN System for January - December 1996 - Sorted by the Chemical Parameter Name column in the summary report.

1. Map of Nitrate ES and PAL Exceedances (PDF - 54KB)
   Nitrate enforcement standard (ES) and preventative action limit (PAL) exceedances for public and private drinking water supply wells. The nitrate ES and PAL is 10 and 2 milligrams per liter (mg/L) respectively. The data represents sampling at 23,647 unique wells from which 73,706 total samples were analyzed.



2. Map of VOC ES and PAL Exceedances (PDF - 44KB)
   Volatile Organic Compounds (VOCs) enforcement standard (ES) and preventative action limit (PAL) exceedances for public and private drinking water supply wells. This map represents analysis for 96 different compounds where 34 of those have ES and PAL standards set. The data represents sampling at 6,399 unique wells from which 870,828 different VOC analysis were run.

1. Public Water Supply (public drinking water supply wells). Data covers the early 1970s to present.
2. Private Water Supply (private drinking water supply wells). Data covers 1988 to present.
3. Groundwater Section ( non-point source priority watersheds and special groundwater studies). Data covers 1988 to present.
4. Bureau of Waste's Groundwater and Environmental Monitoring System (GEMS) (landfill wells). Data covers from the mid 1970s to present.