How a location gets on this list
A location is listed when five or more approved reports from five or more separate households fall within two miles of it. Both halves of that rule matter.
Only approved reports count. Every report is read by a person before it is published. If pending reports counted, anyone could put a location — and by implication a named company — on this list by filling in the form five times.
Households, not reports. Five reports from one household is one household. The count uses the contact details a reporter gives when submitting, which are never published and are used for nothing else. Reports submitted with no contact details count toward the report total but cannot stand in for a separate neighbour.
Why two miles. Published pins are deliberately offset 100–200 metres from the address the resident gave. Two miles is about 3,200 metres — sixteen to thirty-two times that offset — so clustering the published locations gives the same answer as clustering the real ones, and the real ones never have to leave the database.
Clusters are not merged by hand. The strongest cluster in an area is listed and overlapping weaker ones are dropped, so one cluster of eight reports appears once rather than eight times.
What a listing does not mean. Watchlist entries reflect the number and proximity of resident reports. They are not findings of fact. They do not establish that any facility caused any condition described, and a facility named in an entry is named because it is the nearest one to the centre of the cluster, not because it has been shown to be responsible for anything.
Reports are unverified first-hand accounts. If you believe something here is wrong, tell us — we would much rather correct a mistake than defend one.