Have you ever reviewed a laboratory report and felt overwhelmed by acronyms like MDL, RL, LOQ, or IDL? You’re not alone. These terms are critical to understanding the sensitivity, precision, and reliability of laboratory results in environmental testing—but they can also be confusing, especially when used interchangeably or inconsistently across different labs or agencies.
The U.S. EPA released a Draft Sewage Sludge Risk Assessment for PFOA and PFOS, open for public comment. The public comment for the draft, released in January 2025, has been extended until August 14, 2025. This draft risk assessment reflects the EPA's latest scientific understanding of the potential risks to human health
To all of our friends and partners in California impacted by the devastating wildfires, Merit Laboratories is here to support you. When wildfires ravage communities, natural landscape, and places we call home, the impact is major. Lives are interrupted while homes, schools, and businesses are destroyed. Another significant impact of wildfires is environmental contamination.
The U.S. Environmental Protection Agency (EPA) continues to address the growing concerns over PFAS by adding nine new compounds to the Toxics Release Inventory. This move aims to improve transparency and provide better data on the presence and release of these persistent chemicals in the environment.
The analysis of PFAS by EPA 1633A and ASTM D8421 is part of the U.S. EPA’s Methods Update Rule (MUR) Rule 22. The action will promulgate EPA into 40 CFR Part 136. Also part of this action, PFAS method ASTM D8421 is proposed to be codified.
The Wisconsin PFAS Action Council published its 2022 PFAS Action Plan Progress Report in August. The progress report presented progress in the eight themes that are covered in the states PFAS Action Plan to address statewide PFAS contamination. A few of the highlights presented as accomplishments in the report include the implementation of new surface water and drinking water standards for PFOA and PFOS
Merit Laboratories plays an active role in advancing the development of analytical methods for the scientific testing industry. As testament to this active role, Michael Goergen of Merit Laboratories is the chair of ASTM D19.02, a subcommittee of ASTM D19 on Water that addresses Quality Systems, Specifications, and Statistics.
The U.S. EPA (EPA) has released the highly anticipated 2nd Draft of EPA Method 1633, an LC/MS/MS method to analyze PFAS. This second draft, released by the EPA in June, is a follow-up to the original draft released in Fall 2021. One of the most concerning aspects of the first draft was it being based on a single laboratory validation study
The U.S. Environmental Protection Agency (EPA) released updated health advisories in June for PFAS compounds in drinking water. These new limits significantly reduce the guidelines previously established in 2016. The new drinking water interim health advisories reduce the limit for both PFOA (perfluoro-octanoic acid) and PFOS (perfluoro-octane sulfonate).
Merit Laboratories will be presenting at the 2022 National Conference of the American Institute of Professional Geologists (AIPG). The AIPG national conference is set for August 6-9, 2022 in Marquette, Michigan, along the shore of Lake Superior. Maya Murshak, CEO and Technical Director of Merit Laboratories, will be delivering a presentation on Understanding PFAS Methods. The conference will be held at Northern Michigan University’s Northern Center.
Nearly one in every eight community water systems in Illinois were found to have PFAS detections in drinking water. The Illinois Environmental Protection Agency (EPA) recently announced the completion of an 18-month statewide sample collection study of PFAS in drinking water. The study collected drinking water from over 1,000 community water systems (CWS). According to the Illinois EPA, 126 of the 1,107 CWSs sampled had confirmed PFAS detections.
Oil refineries and petrochemical plants that fall under the Petroleum Refinery Sector are required to monitor air emissions at their property boundary. The boundary emission monitoring requirement, referred to as fenceline monitoring, is based upon U.S. EPA rules that became effective in 2016, as updates to 40 CFR Part 60 and 40 CFR Part 63.
