Six-Year Review 1 Contaminant Occurrence Data (1993-1997)
In July, 2003 EPA announced the review results for the Agency’s first Six-Year Review (called the Six-Year Review 1). EPA completed its first detailed contaminant occurrence analyses in 2003 for 69 regulated contaminants, using data provided by a national cross-section of 16 states. Most of the sample data were collected between 1993 and 1997.
Six-Year Review 1 Contaminant Occurrence Data
The Six-Year Review 1 MS Excel PivotTables® below contain summary occurrence data used in developing the first Six-Year Review of national primary drinking water regulations. Download the tables by selecting the link below:
Six-Year Review 1 Occurrence Data Pivot Table (xls)
Data included in the Six-Year Review 1 PivotTable
This PivotTable contains information on Six-Year Review 1 sample data including:
- # analyses performed
- # PWSs with analyses
- # detects
- # PWSs with detects (analytical detections above the reporting limit)
- minimum detect
- maximum detect
- mean detect
- minimum non-zero MRL
- maximum MRL
- mean non-zero MRL
Any or all of the above facts for a contaminant can be categorized by any combination of the following water system attributes:
- EPA Region
- State
- Water system type
- Size category *
-or any combination of the following sample attributes:
- Sample collection year *
- Source water type where the sample was taken *
* To avoid double-counting, the Pivot Tables will not sum the number of PWSs with and without detects across this dimension/attribute. Details on these attributes are provided in the Pivot Tables.