From 100 ng/L to 10 ng/L: Preparing for Tighter PFAS Limits with Shanghai ChiMay Monitoring Solutions The Trajectory of PFAS Limit Tightening PFAS drinking water limits have been on a consistent downward trajectory for over a decade. In 2016, the US EPA established a health advisory level of 70 ng/L for combined PFOA and PFOS….
Detecting PFAS Breakthrough in GAC Filters Through Continuous Conductivity Fingerprinting: Shanghai ChiMay Application Note The GAC Breakthrough Challenge Granular Activated Carbon (GAC) remains the most widely deployed treatment technology for PFAS removal in municipal water systems. The technology is proven, well-understood, and compatible with existing treatment infrastructure. However, GAC has a fundamental limitation: it has…
The Complete Field Guide to Emergency Water Source Monitoring from Shanghai ChiMay Emergency water source monitoring is one of the most demanding challenges a water utility faces. Whether triggered by drought, contamination events, infrastructure failure, or natural disaster, the need to rapidly assess and monitor an alternative water source requires instruments that deploy quickly, perform…
The Historical Model and Why It Worked—Until It Didn’t For most of the past century, cooling tower water treatment followed a straightforward formula: add biocide, add scale inhibitor, add corrosion inhibitor, test the water periodically and adjust doses based on laboratory results. This chemical-only approach was good enough to keep industrial operations running, and it…
The Historical Model and Why It Worked—Until It Didn’t For most of the past century, cooling tower water treatment followed a straightforward formula: add biocide, add scale inhibitor, add corrosion inhibitor, test the water periodically and adjust doses based on laboratory results. This chemical-only approach was good enough to keep industrial operations running, and it…
The Complete Guide to Closed-Loop Cooling System Water Treatment with Shanghai ChiMay Closed-loop cooling systems are sealed from the atmosphere, but that doesn’t make them immune to water quality problems. Corrosion, microbiological growth and chemical degradation all happen inside the loop—silently. Maintained properly, a closed-loop system can run 20+ years without major water-side failures, but…
