Where the iron comes from
- Irrigation from a well, lake or canal: spray-pattern stains at sprinkler height.
- Private drinking well: orange rings in toilets, tubs and laundry.
- Plumbing or water heater: occasional rusty water, often hot side only.
With 23 lakes and canals running through town, irrigation water is the first suspect for outdoor staining in Miami Lakes.
Indoors, a stain that appears only at one fixture usually points to that fixture's plumbing.
Test the irrigation water and the tap
Jorge tests iron and pH at the irrigation source and at an indoor tap. If the indoor WASD water shows no iron and the sprinkler water does, treatment belongs on the irrigation line, not the house. pH matters because it changes which iron treatment works.
He also notes how the pump and irrigation lines are laid out, because any treatment equipment has to fit between the source and the sprinkler zones.
Options
| Situation | Typical approach |
|---|---|
| Well-fed sprinklers | Iron treatment on the irrigation line, chosen from the test |
| Lake or canal-fed sprinklers | Depends on what the test shows; sometimes redirecting heads away from surfaces is the practical fix |
| Drinking well with iron | A well water system configured from the results |
| Rust from pipes | A plumber's evaluation |
Treating surface water from a lake is different from treating well water, and not every option suits it; that's exactly why the test comes first.
Watering rules cover every source
Miami-Dade's year-round restrictions apply to public water, private wells, canals and lakes. Odd-numbered addresses water Wednesday and Saturday, even-numbered Thursday and Sunday, before 10 a.m. and after 4 p.m. Less watering also means less iron hitting your walls.
Shorter run times that follow the schedule also leave less water standing against walls.
Why stains keep coming back
Each watering cycle leaves another thin layer of oxidized iron. Pressure-washing removes the top layer, but the next cycle starts it again. The lasting fix is changing what comes out of the sprinkler head.
New stucco, pavers or a resurfaced pool deck will stain the same way if the water hasn't changed, so solve the source first.
In the meantime
- Aim heads away from walls, fences and pool decks.
- Clean stains early before they set.
- Ask a professional before using acids on pavers or natural stone.
Call, text or WhatsApp (305) 793-5974 for a free iron test.
https://www.miamilakes-fl.gov/our-community/history/
https://www.miamidade.gov/global/water/conservation/outdoor-water-restrictions.page
Updated 2026-10-17 · Living Waters · Jorge Canela, Water Quality Specialist