Then they are pulled out, and the algae gets scraped off. The tiles sit in the water for 14 days so algae can grow on them. “So the algae tiles are just the kitchen tiles on your backsplash, little one-by-one squares gives us a nice surface area for the algae to actually grow,” said Colette Easter, MS4 program administrator for MSD. In September, MSD put ceramic tiles at 27 locations across the county. Results from the testing will be available next year in MSD's annual report.The algae and the quantity of algae are indicators of how clean or polluted the water is at the monitoring sites.The tiles sit in the water for 14 days to accumulate algae that is then collected and tested.Twenty-seven waterways in Jefferson County had ceramic tiles placed by MSD to grow algae.
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