by Environmental Protection Agency (EPA) / Connecting Health Outcomes Research and Data Systems (CHORDS)·Updated 1mo ago
Available on 1 platform
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Description
Drinking water contaminant occurrence data maintained by the U.S. Environmental Protection Agency (EPA). The data includes measurements of chemical, microbial, and radiological contaminants collected from 1988 to the present. This information supports EPA regulatory decision-making, research, and public transparency under the Safe Drinking Water Act.
Use Cases
Analyzing trends in regulated contaminant levels based on the Six-Year Review datasets mentioned in the description
Identifying potential emerging risks from unregulated contaminants based on the Unregulated Contaminant Monitoring Rule data
Supporting regulatory impact assessments using the chemical, microbial, and radiological measurement data
Conducting longitudinal studies on drinking water quality using data collected since 1988
Strengths
Data collection spans from 1988 to the present, providing a long-term temporal scope
Includes measurements for chemical, microbial, and radiological contaminant types as stated
Sourced from authoritative EPA regulatory reviews and monitoring rules
Limitations
Column-level documentation is absent; field semantics must be inferred after download
Row count is unknown, which may limit suitability assessment
Description metadata is limited; actual data quality requires manual inspection after download
Provenance
Source
U.S. Environmental Protection Agency (EPA)
Collection Method
Collected from EPA's Six-Year Reviews of national drinking water regulations and Unregulated Contaminant Monitoring Rule datasets
Time Range
1988 to present
Freshness
Last updated 2026-05-04 15:58:28; freshness should be verified
Geography
United States (implied by EPA jurisdiction and Safe Drinking Water Act)
License is unknown; terms of use should be verified before application.