PIPS: Underway Water Quality Lab on Research Vessel

EPA’s research vessels are critical tools for studying environmental concerns like water quality, contaminants, and harmful algal blooms in the Great Lakes.

However, predicting the exact location of these concerns can be challenging, making it essential for the ships to be positioned in the right place to study them. To tackle this issue, EPA scientists wanted to continuously collect data on emerging environmental concerns, rather than relying on the research vessel’s scheduled sampling stops.

In 2023, EPA scientist Ryan Lepak received PIP funding to develop a new system on EPA’s Lake Explorer II, enabling it to monitor water quality while in motion.

The system continuously pipes water from the lake into an array of sensors that monitor key metrics such as temperature, pH, blue green algae, chlorophyll, and, with the help of National Oceanic and Atmospheric Administration collaborators, dissolved carbon dioxide.

It also collects larger particles using filters so that researchers can determine exactly what contaminants, like mercury and PFAS, are present in a particular area. These devices enable scientists to collect a wide range of information about the lake without stopping the ship or interrupting its planned research activities.

Additionally, the system incorporates custom software that allows EPA scientists to follow up on noteworthy findings. When the sensors detect conditions that merit further attention — such as sudden changes in water temperature or signs of a harmful algal bloom — the system automatically collects a sample of water and stores it for future analysis.

This exciting new technology is being deployed on the Lake Explorer II this summer and is already generating interest from other researchers in the Great Lakes area. According to Dr. Lepak, other research vessels, both within and outside the EPA, have expressed interest in deploying similar technologies on their ships.

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