10/06/2026
As part of our 2026 program theme, Ecologies of Water, WLC is proud to present Know Your Watershed, a monthly series exploring the parts of our local water system and how to care for them. This month, we're looking at pollution pathways, the routes harmful chemicals take through our watershed, and what we can do to help protect local waters.
In a watershed, there is no true "away." Everything that goes down our drains and toilets ends up somewhere. Along with everyday wastewater, local waterways receive pharmaceuticals, cleaning products, pesticides, microplastics, road runoff, and chemicals from construction sites and landfills. As these substances enter streams, rivers, and groundwater, they can affect wildlife and contaminate drinking water sources.
For homes connected to municipal sewer systems, wastewater treatment removes solids, nutrients, and disease-causing bacteria. However, many facilities are not designed to remove newer contaminants such as pharmaceuticals, PFAS, and microplastics. For homes using septic systems, soil filtration helps remove bacteria but is also less effective at filtering many synthetic chemicals. In both cases, pollutants can re-enter local waterways and groundwater.
Because water is reused locally, moving through streams, aquifers, and wells, what we put down the drain can return to our community's water supply. Many contaminants persist in the environment and can accumulate in food webs over time.
Here are a few ways you can help reduce pollution in our watershed:
• Dispose of medications properly. Never flush them. In Woodstock, CVS provides a medication drop-off bin.
• Reduce plastic use, especially single-use plastics and synthetic fabrics that shed microfibers.
• Maintain septic systems and regularly test well water if you rely on a private well.
• Support policies and local efforts that protect drinking water sources and watershed health.
Clean water begins long before treatment plants or well pumps. Protecting our watershed means recognizing that what we send down the drain remains part of the living system we all depend on.