Microplastics, pharmaceuticals, and other emerging contaminants are changing the conversation around industrial wastewater. While many are not yet subject to broad federal regulations, facilities are paying closer attention to what may become tomorrow's treatment challenges.
Industrial wastewater has always evolved alongside industry itself.
Decades ago, the focus was often on suspended solids, oils, heavy metals, nutrients, and pH. More recently, PFAS has become one of the most closely watched groups of contaminants in environmental regulation.
Now another group of materials is beginning to receive increased attention from researchers, regulators, and water professionals: emerging contaminants.
Microplastics and pharmaceutical compounds are among the most discussed examples. While many questions remain about their long-term environmental impacts and how they should be managed, one thing is becoming increasingly clear. These contaminants are moving from research papers into regulatory conversations.
For industrial facilities, that doesn't necessarily mean immediate new requirements. It does mean staying informed about where wastewater management may be headed in the years ahead.
What Are Emerging Contaminants?
The term emerging contaminants refers to substances that have been detected in water, wastewater, or the environment but are not yet widely regulated under existing drinking water or wastewater standards.
These contaminants may include:
- Microplastics
- Pharmaceutical compounds
- Personal care products
- Hormones
- Industrial additives
- Flame retardants
- Certain pesticides
- New classes of manufacturing chemicals
Many have likely been present in wastewater for years. What has changed is our ability to detect them and our understanding of how they move through the environment.
Why Are Microplastics Receiving So Much Attention?
Microplastics are tiny plastic particles generally smaller than five millimeters.
They can enter waterways in many different ways, including:
- Breakdown of larger plastic materials
- Manufacturing processes
- Synthetic textile fibers
- Tire wear
- Consumer products
- Industrial operations
Because they are extremely small, microplastics can be difficult to remove completely once they enter aquatic environments.
Researchers continue to study how they move through ecosystems and what long-term impacts they may have on wildlife and human health.
For industrial facilities, the conversation increasingly centers on preventing plastics from entering wastewater in the first place and improving removal technologies where appropriate.
Why Are Pharmaceuticals Being Discussed Alongside Wastewater?
Pharmaceutical compounds enter wastewater through several pathways.
They may originate from:
- Human use and excretion
- Improper disposal
- Healthcare facilities
- Pharmaceutical manufacturing
- Research laboratories
Many wastewater treatment systems were never originally designed to remove trace pharmaceutical compounds.
As analytical methods have improved, researchers have detected a growing number of these substances in rivers, lakes, and treated wastewater, prompting additional study into treatment technologies and environmental impacts.
Why Is This Becoming a Regulatory Discussion?
One of the biggest changes over the past several years has been the amount of attention these contaminants are receiving from regulators.
In 2026, the U.S. Environmental Protection Agency took the notable step of including microplastics and pharmaceuticals as priority contaminant groups in the draft Sixth Contaminant Candidate List (CCL 6) under the Safe Drinking Water Act. Inclusion on the list does not create immediate regulations, but it does signal that EPA considers these contaminants worthy of additional research and evaluation for potential future regulation.
Historically, this is how many contaminants begin the regulatory process. Research expands, monitoring increases, treatment technologies improve, and standards may eventually follow if the science supports them.
What Does This Mean for Industrial Facilities?
For most facilities, there are no immediate operational changes required simply because these contaminants are receiving more attention.
However, it does reinforce the importance of understanding what is leaving a facility.
Many organizations are already taking steps such as:
- Reviewing wastewater characterization programs
- Evaluating treatment performance
- Identifying potential sources of emerging contaminants
- Improving spill prevention and housekeeping
- Monitoring changes in state and federal guidance
Facilities that understand their wastewater today are generally better positioned if future requirements evolve.
Can These Contaminants Be Removed?
In many cases, yes, although the answer depends on the contaminant.
Traditional wastewater treatment may remove a portion of some emerging contaminants, but advanced treatment technologies often provide higher removal efficiencies.
Depending on the application, treatment approaches may include:
- Advanced filtration
- Membrane systems
- Activated carbon
- Advanced oxidation
- Coagulation and clarification
- Biological treatment
- Specialized polishing processes
Research in this area continues to advance rapidly as utilities, industrial facilities, and technology providers look for more effective treatment solutions. Studies have also demonstrated promising results for technologies targeting microplastics specifically.
Looking Ahead
The history of industrial wastewater is a history of adaptation.
As manufacturing changes, analytical tools improve, and scientific understanding grows, the list of contaminants receiving attention naturally evolves as well.
Microplastics and pharmaceuticals are part of that evolution. Whether future regulations ultimately expand or remain targeted, these contaminants are already influencing how researchers, regulators, and industry think about water quality.
At Valicor, we work with industrial facilities across a wide range of wastewater streams, helping customers understand, characterize, transport, and treat materials generated by modern manufacturing processes. As new wastewater challenges emerge, staying informed and planning ahead remain some of the most effective tools for maintaining compliance and protecting water resources.
