If you clean surfaces outdoors, or hire someone who does, the goal is simple: keep wash water out of storm drains.
That’s why working with BAMSC-trained and certified mobile cleaners matters. Certified professionals are trained to contain, collect, and properly dispose of wash water so it doesn’t flow into the storm drain system.
Why is this important? Because storm drains don’t lead to a treatment plant. They lead straight to our local creeks and the Bay.

Why This Matters
Wash water isn’t just dirty water. Wash water can contain:

- Soaps and detergents — Even products labeled “biodegradable” can harm fish and aquatic life when they enter creeks untreated. Wastewater plants can remove these pollutants; storm drains do not.
- Oil and grease — From vehicles, machinery, and food service areas.
- Food waste and organic debris — From dumpster pads, restaurant mats, and food carts.
- Cleaning chemicals — Solvents, degreasers, and disinfectants used during surface cleaning.
- Heavy metals and paint particles — From building washing or surface preparation.
- Sediment and debris — Dirt and fine particles that cloud waterways and harm habitat.

When this mix flows untreated into our waterways, it can degrade water quality, harm wildlife, and affect the places our community swims, fishes, and enjoys nature.
Many common mobile services generate wash water, including power washing, mobile auto detailing, food service cleaning, pet grooming, carpet cleaning, pool maintenance, and landscaping work. That’s why proper containment and disposal are essential.
Choosing a BAMSC-certified professional (or becoming one) helps protect our shared waterways and keeps our community’s water clean for everyone.
Wash Water. Contain it, collect it, and dispose of it.
These best management practices keep pollutants out of storm drains:
Plan Before You Start
Walk the site and locate all storm drains. Know where they are before turning on water.

Decide where wash water will go. You have three options:
- Sanitary sewer through a sink, floor drain, mop sink, cleanout, or toilet (requires permission from the property owner)
- Landscaping or gravel where water completely soaks into the ground
- Wet/dry vacuum to collect water for proper disposal
Have equipment ready. Long hoses, wet/dry vacuums, containment mats, sandbags, and berms help control where water goes.
During the Job

- Do dry cleanup first. Sweep up debris, food waste, and dirt before using water.
- Block storm drains. Use covers, sandbags, or berms before washing begins.
- Contain the wash area. Keep water from flowing to streets and gutters.
- Minimize water use. Spray nozzles help control flow.
- Use less-toxic products when possible. Wash without soaps when you can. If cleaning products are necessary, choose less-toxic options.
- Collect wash water. Use a wet/dry vacuum to capture water for proper disposal.
After the Job

- Dispose of wash water properly. Direct it to a sanitary sewer, landscaping (with complete infiltration), or collect for disposal. Never let it flow to streets, gutters, or storm drains.
- Remove all debris. Dispose of trash properly and handle hazardous materials safely.
- Remove storm drain protection. Take plugs, covers, or sandbags with you.
Owners, workers, customers. Everyone has a role.
Keeping our waterways clean requires teamwork between service providers and customers.
For Mobile Business Owners and Workers
- Make pollution prevention part of your standard service. Include proper disposal in every job. This shows your professionalism and protects water quality.
- Invest in the right equipment. Wet/dry vacuums, containment systems, and long hoses expand where you can work.
- Get trained and certified. Free programs teach efficient techniques while offering recognition that helps you stand out. Training is available in English and Spanish.
- Plan ahead for each job. A few minutes of planning prevents problems and saves time.

For Those Who Hire Mobile Services
- Ask about wash water disposal before hiring. Find out how contractors handle it.
- Look for trained professionals. BAMSC certifies mobile cleaners in pollution prevention. Hiring trained contractors reflects your responsibility and protects our water quality.
- Provide access to disposal options. Allow contractors to use sanitary sewer connections when possible.
- Include pollution prevention in contracts. Make proper disposal a service requirement.
- Share information with vendors. Forward helpful resources to businesses you work with.
Free Training and Resources
Become a BAMSC-Recognized Surface Cleaner

Mobile cleaning businesses can complete an easy and free online training through the Bay Area Municipal Stormwater Collective (BAMSC). The program includes:
- Registering your name
- Watching a 16-minute training video (available in English and Spanish)
- Reviewing FAQs and common terms
- Taking a self-quiz
- Emailing BAMSC to confirm completion
Certificates are valid for one year and must be renewed annually.
After completing training, you receive:
- Certificate of Training
- Listing on the BAMSC website as a Recognized Surface Cleaner
- Promotional materials for your business
Property owners can check the list of BAMSC-Recognized Surface Cleaners when hiring contractors.

Download Helpful Fact Sheets
General Guidelines:
Best Management Practices for Mobile Businesses (Spanish | Chinese)
Service-Specific Guides:
- Food Service Mobile Cleaning
- Vehicle and Equipment Washing
- Carpet and Upholstery Cleaning
- Mobile Fueling
- Mobile Graffiti Removal
Get Local Support
Need help with disposal requirements? Contact your local wastewater treatment plant or city stormwater inspector.
Share resources with your team—training materials and fact sheets are available in Spanish for Spanish-speaking workers.

Our local creeks and San Francisco Bay depend on daily decisions by mobile service providers and the people who hire them. Following these practices helps you deliver excellent service and protect water quality.
Learn more at Mobile Cleaners & Businesses or explore the Flows to Bay website.



























