The Safe Drinking Water Act, Explained
The 1974 law behind every US tap, and what it does and does not cover.
Jun 12, 2026HOME / REGULATION & DATA
Section Regulation & Data
How US drinking water is regulated and how standards and contaminants have changed.
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How the EPA Sets Drinking Water Standards
MCLs, MCLGs, and how limits and contaminants have changed over time.
May 16, 2026