EPA Method 245.2 Cold Vapor Mercury Water Analysis
Summary
EPA has finalized Method 245.2, a standardized cold vapor atomic absorption technique for determining mercury in water and wastewater. The method specifies sample preparation, analytical parameters, and quality control requirements for laboratory compliance with EPA mercury monitoring programs.
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What changed
EPA has adopted Method 245.2 for cold vapor mercury determination in water. The method provides laboratories with a validated atomic absorption procedure for measuring total mercury in drinking water, surface water, and wastewater samples. Key provisions include calibration requirements, detection limits, and QC acceptance criteria.
Laboratories currently performing mercury analysis should review Method 245.2 for adoption into their quality assurance programs. Compliance with the method may be required under Clean Water Act discharge permits and Safe Drinking Water Act monitoring programs.
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Apr 28, 2026GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.
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