Every pressure-washing job creates two things: a clean surface, and hundreds of gallons of dirty water. The clean surface is what you inspect. The dirty water is what can get your property cited.
In the Las Vegas Valley, storm drains don’t lead to a treatment plant — they run to the washes and, eventually, toward Lake Mead. That’s why federal Clean Water Act rules and the valley’s local stormwater programs prohibit sending wash water — with its oils, detergents, and grime — into a storm drain. When a vendor rinses a garage level or a drive lane and lets the runoff sheet into the gutter, the discharge is on record at your address. Property owners and managers, not just contractors, can end up answering for it.
Here’s what to know before your next exterior cleaning project, and how to tell whether a vendor is actually set up to do this right.
1. Know where your water goes before anyone pulls a trigger
Walk the area and find the drains. Anything that leads off-site is a storm inlet unless marked otherwise. A compliant crew blocks or berms those inlets before work starts — mats, socks, or inflatable plugs — and plans where the water will collect.
2. Containment beats apology
Good crews work in zones, using berms and vacuum booms to keep wash water pooled where it can be recovered. If you watch a crew chase water downhill with a squeegee toward the street, that’s the tell that there was never a recovery plan.
3. Recovery: the dirty water has to be captured…
Recovered wash water gets vacuumed up as the work proceeds — not left to evaporate into a grime ring. On flat work (garages, loading docks, drive-throughs), surface cleaners with integrated vacuum recovery do this in one pass.
4. …and then it has to go somewhere legal
Captured water is either filtered and reused on the job, or disposed of to the sanitary sewer where permitted — never the storm drain. Ask your vendor, in writing, where recovered water goes. A professional has a one-sentence answer.
5. Ask for the equipment, not just the promise
“We’re compliant” is easy to say. Reclaim capability is physical: recovery surface cleaners, vacuum systems, holding tanks, filtration. If the rig on your property is a box-store pressure washer and a garden hose, the compliance plan is hope.
How we can help
Green Clean runs a dedicated mobile wash-and-reclaim rig — onboard water recovery and filtration built into the trailer — so the dirty water leaves with us, not down your drains. It’s how we handle garages, drive lanes, dumpster pads, and building exteriors across the valley: commercial pressure washing in Las Vegas that cleans the concrete and keeps your property off the stormwater radar. If you have an exterior project queued for the post-monsoon window, request a free walkthrough — we’ll scope the water plan along with the square footage, and you’ll get the quote with man-hours shown.