If you live anywhere in Tampa Bay, you've seen it: a white vinyl fence with an orange arc sweeping across it, or a stucco wall that's slowly turning the color of a creamsicle from the ground up. It isn't dirt, and it isn't mildew. It's rust, and your sprinklers are putting it there.
Where the iron comes from
A lot of Tampa Bay homes irrigate from private wells or reclaimed systems instead of drinking water. Groundwater here often carries dissolved iron. It's invisible coming out of the sprinkler head, but when the water dries on a surface, the iron reacts with oxygen and turns into iron oxide, the same compound as rust on a nail.
One sprinkler cycle leaves almost nothing. But irrigation runs several times a week, every week, and each pass adds a thin layer. That's why the stain follows the exact spray pattern of the nearest head, and why it gets darker every year.
Why pressure washing doesn't fix it
Rust doesn't sit on top of the surface like dirt; it bonds into it. A pressure washer can lighten the stain, but usually leaves an orange shadow behind. Turn the pressure up to chase it and you risk etching stucco, scarring vinyl and blowing the sand out of paver joints. We wrote more about that in pressure washing vs. rust removal.
What actually removes it
Rust has to be dissolved, not blasted. A treatment designed for iron oxide breaks the bond, the stain releases, and a gentle rinse carries it away. That's how our sprinkler rust removal works: Landscape Shield™ to protect your landscaping, our proprietary blend applied by hand, then a low-pressure rinse. Results begin in about 15 minutes.
How to slow it down
- Adjust heads that hit your house or fence directly. A small turn can move the spray onto the lawn where it belongs.
- Ask about an iron filter or a rust-inhibitor system for your well. Irrigation companies install both.
- Remove new staining early. Light staining comes off far more easily than years of buildup. That's the idea behind our preservation plans.
Not sure what you're looking at? Text a photo to 727-C-BRIGHT and we'll tell you.