Legend Ring size follows generator count; stroke weight follows permitted MW; the glow follows the NOx cap. The number inside is the count where a permit document states one. Grey rings count permits of every type — air, stormwater, wetlands, tanks, water — from the state tracker.
Diesel backup generators
Natural-gas plant or engines
Both at one site
Heavier ring stroke, more permitted MW
Glow widens with the NOx cap; no glow, no cap published
Dashed thin ring: no MW figure published — nothing on record, not zero
Grey ring: site known through its permits (any type); the number is permits filed
Dashed grey, ≈ label: pinned at the county centroid, not the parcel