Neighbor Leander discovered a Bernal Heights mystery recently:
My son and I walked all over south Bernal and noticed something odd: Every single storm drain has blobs of paint that look like balloons rising from the grating. The blobs are multicolored — red, blue and yellow — and most have long drips of white paint that look like balloon strings.
It was really strange. The first one, we thought someone had illegally dumped some paint down the drain. But they appear on literally every single drain we investigated.
Is it a strange art project? Some kind of construction signage, like the spray paint street hieroglyphics?
Or, another obvious possibility: Coded communications used by sewer-dwelling space aliens. Any other theories? Informed speculations?
UPDATE: Bernalwood readers are not only glamorous; they’re also wickedly well-informed. In the comments, we learn that these dots are markers used for San Francisco’s mosquito abatement program. Wendy McNaughton created the illustrated answer:
PHOTOS: Neighbor Leander