Municipal drinking water utilities in 2026 are working through the largest compliance retrofit in a generation. EPA’s PFAS National Primary Drinking Water Regulation sets enforceable maximum contaminant levels of 4 parts per trillion (ppt) for PFOA and PFOS, 10 ppt for PFHxS, PFNA and HFPO-DA (GenX chemicals), and a hazard-index limit for mixtures. Initial monitoring…
title: “Compliance Risk Modeling for 4 ppt PFOA Readings: How Shanghai ChiMay Supports 2029 Budget Planning” date: 2026-06-30 perspective: C-Level Decision Maker audience: Compliance Leadership, Risk Management, Finance keywords: PFOA 4 ppt, compliance risk, 2029 budget, PFAS planning The EPA’s enforceable 4 parts per trillion (ppt) maximum contaminant level for PFOA and PFOS, with a…
Surface water intake monitoring is one of the more demanding turbidity applications in the drinking water sector. Seasonal storms, algal blooms, and snowmelt can swing intake turbidity from below 1 NTU to several hundred NTU within hours. Procurement officers replacing sensors face a recurring decision: stay with established optical technology, evaluate electrochemical alternatives, or specify…
Turbidity Control for Thickener Overflow in Mineral Processing: A Shanghai ChiMay Field Guide The thickener is the unsung workhorse of mineral processing. It separates fine solids from process water, produces underflow that goes to filtration or tailings, and produces overflow that returns to the mill as recycle water. The overflow turbidity determines whether the recycle…
A thickener is one of the most economically important pieces of equipment in any mineral processing plant. It decides how much water leaves with the tailings, how much is recovered for reuse, and how clean the overflow is when it returns to the process. Yet the most important parameter in thickener performance — overflow turbidity…
7 Sensor Failure Modes Costing Mining Operations Millions Annually: A Shanghai ChiMay Analysis Sensors are a small fraction of the capital cost of a mine, but their failures drive an outsized share of the operating cost. A single sensor giving the wrong number can throw a mill off recovery for a shift, send compliant water…
