What are PFAS and how did they get in the water?

PFAS stands for per- and polyfluoroalkyl substances. The 3M Company made PFAS at its Cottage Grove facility from the late 1940s until 2002. They were commonly used in household and industrial products such as stain repellents, lubricants, fire retardant and suppressants and more. PFAS wastes were disposed of at various locations in Washington County. The source of PFAS in the Oakdale’s groundwater has been identified as these disposal sites.

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1. What are PFAS and how did they get in the water?
2. Is Oakdale water safe to drink?
3. How many Oakdale municipal wells exceed PFAS water quality standards and guidelines?
4. How does the Oakdale water treatment facility treat the water?
5. I didn't know PFAS were in the water. Where can I learn more?