Orange & Rust Stains From Water in Pembroke Pines

Find the pattern first

• Arc-shaped stains at sprinkler height on walls and fences: irrigation water.
• Stains on the driveway where heads overspray: irrigation water.
• Orange in toilet tanks, tubs and laundry: the household supply, usually a private well.
• One fixture only: an old pipe, valve or the water heater.

Why irrigation water stains

Iron dissolved in groundwater is invisible until it meets oxygen. When sprinkler water dries on a wall, the iron oxidizes into orange-brown rust that bonds to porous surfaces like stucco and concrete. The longer it goes, the harder it is to clean. Some communities irrigate common areas from lakes or community wells; if the stains are on shared property, your HOA is the place to ask about the irrigation source.

City water is a different story

According to the city's 2025 Water Quality Report, Pembroke Pines pumps from Biscayne Aquifer wells and softens and filters the water before disinfection. Treated city water is not a typical source of exterior staining. If tap water turns brown or orange suddenly, call Utilities Customer Service at 954-518-9000 or the after-hours line listed on the Utilities Department page.

What to test

• Iron and manganese in the irrigation or well water.
• pH, which changes how iron behaves and which treatment works.
• Hydrogen sulfide, which often comes along with iron.
• Your indoor tap, to confirm city water is not involved.

Cleaning after the fix

Once the source is handled, rust stains can be cleaned from stucco, pavers and concrete with products made for iron stains. Test any cleaner on a small spot first, follow label directions, and rinse plants nearby. Pressure washing alone rarely removes set-in iron. If stains return after cleaning, the irrigation water is still carrying iron and the treatment needs another look.

Ways to stop it

• Iron treatment on the irrigation line, such as oxidation and filtration, before water reaches the heads.
• Adjusting sprinkler heads so they do not hit walls, screens, pavers or the pool deck.
• Well water systems for drinking wells, built from the well's test; see well water systems.
• Plumbing repair where an old pipe or heater is the cause.

Clean only after the source is handled, or the stains come right back.

Updated 2026-10-17 · Living Waters · Jorge Canela, Water Quality Specialist