For most of the U.S. and Canada, autumn is marked by falling temperatures, falling rain and falling leaves. For municipalities and sewer inspection crews, these seasonal changes bring new challenges. While stormwater systems are typically prepared for increases in the volume of water, the added leaf litter can aggravate the treatment process, overwhelm systems and exacerbate existing pipeline defects and deterioration.

When you think of algae, you probably think of a water quality problem, not a solution. What likely comes to mind are lakes and rivers overrun with microscopic slime particles and warning signs dotting the shoreline—often the result of wastewater treatment failure. Over the past few years however, numerous organizations have started rethinking microalgae within the context of wastewater treatment. When given a closer look, the two together make quite a team.

Like other civil infrastructure in the U.S., many of our sewer, storm and water lines are over 50 years old (BAFuture). One of the biggest issues facing underground infrastructure is corrosion. A study from NACE International estimates the annual direct cost of corrosion for the water and wastewater industry is $36 billion. This cost includes replacing extremely corroded lines; lost water from cracks and breaks; application of corrosion inhibitors, internal linings and external linings; external coatings and cathodic protection.

Stormwater pollution impacts water quality, public health and the local economy of the communities we live and serve in. Ensuring that municipal and state water systems are clean and well-maintained is a major part of protecting the communities we inhabit and building a sustainable, long-term solution to stormwater pollution. In a new guide, the Environmental Protection Agency asserts, “early and effective stormwater planning and management by communities as they develop will provide significant long-term cost savings while supporting resilience, economic growth and quality of life.”