Why wasn't this an issue until now?

Though we presume that PFAS6 has been in the water of over 40 years, there hasn't been a way to test at the levels we have been until now. The Massachusetts DEP lowered the standard of PFAS6 levels in October of 2020 with Burlington required to test for the first time in April 2021. 

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1. Why are we not getting all water from the MWRA?
2. Why wasn't this an issue until now?
3. What is the Town doing for a short-term solution?
4. What is the Town doing for a long-term solution?
5. Why are we building a filter facility at Mill Pond vs. a full MWRA connection?
6. What should I do as a resident?
7. What can I do if I am in a sensitive subgroup?
8. What is considered a sensitive subgroup?
9. How often do we sample for PFAS6?
10. How will residents be alerted to any changes related to PFAS?
11. Will boiling water for consumption improve the water quality?