Ponds, drainage and what the rain leaves behind
Communities like this are built around retention ponds and swales that carry the heavy summer rain away. Water runs off roofs, down walls and across driveways, and it leaves trails of mildew and mineral deposit where it dries slowly. Lower areas near drains and pond edges stay damp longer than open, sunny ground.
That is also why disposal of wash water matters. Soapy or dirty water should not run freely into drains that lead to ponds. We plan where water will flow, keep cleaning solution away from edges and pond banks, and avoid blasting loose sand into the stormwater system.

