UCM Rounds 1 & 2 (1988-1997)
The Round 1 dataset contains public water system monitoring sample results for 62 (then) unregulated contaminants.
These data were collected from 40 states and primacy entities between 1988 and 1992. Round 1 data were stored in a database called the Unregulated Contaminant Monitoring Information System (URCIS).
The Round 2 dataset (the second round of unregulated contaminant monitoring) contains public water system monitoring sample data for 48 (then) unregulated contaminants. These data were collected from 35 states and primacy entities between 1993 and 1997. Round 2 data were obtained from the EPA Safe Drinking Water Information System (SDWIS/FED).
The summary report (June 2001) includes summary descriptions of the contaminants from each dataset, data quality assessments and contaminant occurrence analyses. Also included is a description of how individual state data sets were assembled into a single "national cross-section" data set that is indicative of contaminant occurrence nationally. The complete National Occurrence report (May 2001) provides full descriptions and details.
|
