Contaminant Removal Resources

1. Your Chlorine Sensor Is Lying to You — Here's 65 Days Of Proof 3/17/2026

   The operators at Compton Durville Water Treatment Works thought their chlorine dosing was under control. Their Siemens Depolox membrane sensor showed residuals right at setpoint. The PID loop was doing its job. On paper, everything looked fine. It wasn't. 

2. EPA's Proposed Perchlorate Regulation: What It Means For Treatment Engineers And Oxidation Strategies 3/11/2026

   EPA’s proposed perchlorate regulation challenges utilities to integrate advanced oxidation and separation technologies, enabling reliable removal, regulatory compliance, and flexible treatment for emerging contaminants.

3. Setting Global Standards: Inside North America's Only Full-Scale UV Disinfection Validation Facility 1/15/2026
   Portland's industry-leading facility reaches 100 reactor validations in 23 years.
4. Electrocoagulation Unlocked 1/2/2026

   Despite electrocoagulation's demonstrated effectiveness, developing a reliable, low maintenance reactor with sufficient water processing volume has proven to be a significant engineering challenge.

5. Custom Tank Designs That Actively Manage PFAS Mass Transfer Zone (MTZ) — And Why It Matters More Than Ever 12/23/2025

   As utilities prepare for the pending 4-ppt PFAS drinking water MCL, many are discovering that legacy lead/lag designs—workhorses for decades when treating contaminants in the ppm and ppb range—simply are not optimized for the parts per trillion-level (ppt) precision PFAS demands.

6. Ion Exchange (IX) Systems 12/5/2025

   Ion exchange (IX) is a tried-and-true method of removing metals and other inorganic compounds from water. Arsenic, cadmium, chromium, copper, lead, nickel, selenium, radionuclides, and zinc are just a few examples of the compounds that our ion exchange systems have removed from water.
7. Ozone And PFAS: The Overlooked Tool In A National Water Crisis 9/25/2025

   Ozone is a vital pre-treatment for PFAS mitigation. It oxidizes precursors and co-contaminants, significantly extending the service life of downstream GAC and membrane systems.

8. Ozone Vs. UV-AOP: Choosing The Right Path For Advanced Water Treatment 9/22/2025

   Ozone and UV-AOP each offer powerful contaminant removal for drinking water, wastewater, and reuse applications. Their unique strengths—and potential synergy—help utilities meet diverse treatment goals efficiently.

9. AEC System Proven Effective For Chloride Removal 9/16/2025

   In two bench-scale tests, a new technology effectively removed up to 99% of chlorides and 97% of total dissolved solids in a single pass. This solution offers a commercially viable alternative to traditional treatment methods.

10. What Are Legionella Log Books And Why Are They Important? 8/11/2025
    Implementing and managing a Legionella control regime can sometimes seem daunting and complex. Invariably, a lot of resources, time, and effort are needed to achieve the required standard and provide assurance to senior management and auditors that controls are effective and those that are not are being managed and rectified appropriately.