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Uxbridge weighs alert protocol as PurpleAir sensors track summer smoke and particulates
Summary
Board discussed PurpleAir monitors at town hall, library and schools, plans to post live data and state guidance, and considered a local 'code red' alert if readings reach extremely unhealthy levels amid regional smoke events.
Board members discussed air quality monitoring and possible public notifications after recent Canadian wildfire smoke increased fine‑particle (PM2.5) readings in the region.
Staff described PurpleAir sensors the town obtained through a prior grant; sensors are sited at town hall, the library and at schools, although two school sensors were currently offline. Staff said the town’s PurpleAir data are visible on the public map and that staff can post state Department of Public Health guidance and local advisories on the town website and social channels.
Board members raised the possibility of a local protocol to post a 'code red' alert if sensors reach extremely unhealthy readings, while staff said the current practice is to follow state alerts and post links to state guidance. The board discussed moving some sensors to more accessible locations (such as the police station) to simplify maintenance and connectivity, and staff offered to post guidance and advisories when readings rise.
The discussion also noted that resident‑owned PurpleAir devices appear on the public map and that regional sensors showed broad area impacts on the day in question. No formal change to the town’s alert procedure was adopted during the meeting; staff said they will post state advisories and consider additional outreach steps if readings escalate.
Provenance: air‑monitoring discussion appears in SEG 668–916 of the transcript.
