What dirties solar panels in Mulberry
Phosphate mining and processing dust
Mulberry sits inside the active phosphate mining belt itself, not just near its edge. The dust film here is heavier and more consistent than anywhere else in Polk, settling within weeks rather than months even on a freshly cleaned array.
Mine reclamation land dust
Large tracts of reclaimed and active mining land surround the city, and dry-season winds carry fine mineral particulate off exposed ground into residential areas.
Payne Creek area pollen
Homes toward the Payne Creek border pick up a lighter, more typical pollen load from surrounding woodland, a contrast to the mineral-heavy dust closer to downtown.
Lovebug season
Standard twice-yearly lovebug residue, worsened by the mineral dust it tends to bond with here, requiring a thorough pure-water clean.