This article discusses the regulations and methodology for determining priority pollutant metals. It highlights the unique nature of metals as environmental and industrial pollutants and their potential detrimental effects on humans. It also describes the collaboration between federal and state agencies, private sector industrial participants, and academic research institutions in studying the sources, distribution, and environmental impact of metal pollutants.
This document serves as an application note regarding the determination of priority pollutant metals. It outlines the regulatory framework established by the US Environmental Protection Agency (EPA) under the Safe Drinking Water Act and the Federal Water Pollution Control Act (Clean Water Act). The text details maximum allowable concentrations for various metals in drinking water and describes effluent regulations for industrial dischargers.
| Arsenic Maximum Allowable Level | 0.05 mg/L |
|---|---|
| Cadmium Maximum Allowable Level | 0.01 mg/L |
| Lead Maximum Allowable Level | 0.05 mg/L |
| Mercury Maximum Allowable Level | 0.002 mg/L |
| Sodium Recommended Maximum Level | 20 mg/L |
The standards regulate eight metals: Arsenic, Barium, Cadmium, Chromium, Lead, Mercury, Selenium, and Silver.
Cadmium and mercury were designated as toxic pollutants applicable to all dischargers.
The EPA has recommended a maximum level of 20 mg/L for public drinking water.