Toxin Alert Map Drinking Water Filter

Types of Water Systems


Amount of Contaiminant in the Water

(Arsenic, Cadmium, Copper, Lead, Mercury)

* EPA's Maximum Contaminant Level (MCL): The highest level of a contaminant that is allowed in drinking water.

Current Violations

Toxin Alert Map Legend

Source of Report

Non-Drinking Water (Surface & ground water. Source from EPA)
Drinking Water (Public water systems. Source from EPA)
Drinking Water, reported by private organizations or neighbors

Color Variations for Severity

  • Equal or exceed MCL*,
  • Serious Violation, or
  • Health-Based Violations
  • Equal or greater than 50% but less than MCL*,
  • Monitoring & Reporting Violations, or
  • Public Notice Violations
  • Equal or greater than 10% but less than 50% of MCL*,
  • Other Violations, or
  • Any violation remained
  • Less than 10% of MCL*, or
  • No violation reported

*MCL: EPA's Maximum Contaminants Level

Note: For a location that has multiple color variations, higher severity color trumps lower.

ex) Red > Orange > Yellow > Green

Drinking Water Icon Variation by Serving Population

N < 1,000
1,000 ≤ N ≤ 10,000
10,000 ≤ N ≤ 100,000
N ≥ 100,000