Where Does Pressure Washing Water Go?

What We Think Every Homeowner Deserves to Know

Ask ten exterior cleaning companies what's in their tank, and most will tell you it's eco-friendly.

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Ask where that water actually goes once it leaves your home, and you'll get a lot fewer answers.

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It's a fair question to be unprepared for. Most companies are focused on the results in front of them, the clean siding, the bright roof, and the water running off the edge of the driveway just isn't something anyone's trained to think about twice. But it goes somewhere, and what happens next matters just as much as what happened on the surface of your home.

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We think it's one of the most important questions you can ask, and one we're always glad to answer before you hire anyone.

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Where the water actually goes

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When a house or driveway gets washed, the runoff doesn't disappear. It flows across your yard, down your driveway, and into the nearest storm drain. Here's the part a lot of people don't know: storm drains aren't connected to a treatment plant. Unlike the water that goes down your kitchen sink, storm drain runoff goes straight into local creeks, streams, and waterways, untreated. Whatever's in that water when it leaves your property is what your neighborhood's wildlife, and eventually its people, come into contact with downstream.

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Understanding dilution

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You may hear that a diluted chemical is basically harmless by the time it reaches the ground. There's real truth buried in that, dilution genuinely does reduce concentration. But it's worth understanding why bleach discharge into storm drains and waterways is regulated in the first place: not because a few drops are individually catastrophic, but because runoff adds up. Dilution at the point where one hose meets one driveway isn't the same as dilution at the point where dozens of driveways in a neighborhood all drain into the same creek. It's a genuinely complicated question, and we'd rather you understand the real picture than take anyone's word for it, including ours.

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How we handle this, no matter what's in the tank

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We take the same level of care regardless of which wash we're running. Our eco-friendly cleaning chemistry, the products behind our Renew Wash tier and our driveway service, works through oxidation, not chlorine, and once it finishes reacting, it breaks down into water and soda ash, the same soda ash used in baking and laundry. But it's still a chemical, and we don't treat "eco-friendly" as a reason to skip precautions. We block drains and control runoff on Renew Wash jobs too, not just because we have to, but because we think you deserve that regardless of what's in the tank.

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When a job calls for Restore Wash, our strongest option, every precaution gets taken further still. A full pre-soak and rinse of your landscaping. Correct dilution for the specific surface being cleaned. Drain covers so nothing reaches the storm system untreated. Nothing left to chance.

 

This is our pledge, to the environment and to you as the homeowner: no matter which wash we're running, we treat your property and everything downstream of it like it matters. Where the water goes is something we've thought through before we ever turn a wand on, not a question we're hoping you never ask.

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What this means for you

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A quick wash and a careful one can look identical in the after photo. The real difference shows up later, in what happened to your plants, and in what happened to the water that left your property.

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Before you hire anyone, it's worth asking two simple questions: what's in the tank, and where does the water go? We think you deserve a real answer to both, and we're always happy to give you ours.

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- From the Magnolia Exterior Co. team.