Solid = within its display life · faded = expired

Bloom: solid = council sampling · hollow = satellite. Protected-water colours are screening priority only. Neither is an offence or food-safety finding.

Hollow gauge = too little record to judge · size = how unusual. Not a flood warning — councils issue those.

Hollow = no instrument. Not a weather warning — MetService issues those.

Relative concentration across the current model points — not an AQI or regulatory health scale.

Spectral departure from each site's seasonal baseline. An anomaly is not a disease diagnosis.