Trash Can and Dumpster Wash Water Rules: What Cities Require

Short answer: in most US cities, wash water from trash cans and dumpsters cannot go into a storm drain. It has to be contained, captured and sent to the sanitary sewer (often with a permit or pretreatment) or another approved disposal point. Fines can reach thousands of dollars a day, so a bin or dumpster washing business needs a way to catch every gallon it sprays.

Why is trash can wash water treated as a pollutant?

Bin and dumpster wash water carries food waste, grease, bacteria, leachate and detergent. Storm drains are not connected to the sewer treatment plant, so anything that enters them flows untreated to creeks, rivers and the ocean. The City of San Diego fact sheet on trash cans and dumpsters puts it plainly: everything that enters storm drains flows untreated directly into local creeks.

What do cities actually require? Examples from California and Texas

Rules are local, but they follow the same pattern: no discharge to the street or storm drain, capture the water, and dispose of it the approved way.

• San Diego, CA: it is illegal to discharge pollutants from trash cans and dumpsters, and all wash water must be contained, captured and disposed of appropriately. Penalties can reach $10,000 per day per incident (San Diego).

• Contra Costa County, CA: wash water from mobile surface cleaning must never enter the storm drain, and it must be pretreated and permitted before going to the sanitary sewer. Dumpster enclosures at food service sites are named as surfaces mobile cleaners work on (Contra Costa County).

• Fort Worth, TX: mobile power washers must register with the city and capture wash water, with fines up to $2,000 a day (Fort Worth).

• Lubbock, TX: mobile washers need a permit carried on the unit, and wash water must be collected with a vacuum, sump pump, berm or absorbent mats so it never reaches a street or storm drain (Lubbock).

Before you launch or expand a route, call your city's stormwater office and the local sewer district. Ask whether you need a mobile wash permit, where you may discharge, and whether pretreatment is required.

Who is responsible if wash water reaches a storm drain?

Usually both the washer and the customer. Contra Costa County, for example, says the businesses and residents who hire a cleaner are ultimately responsible for discharges from their contractor. That is why property managers and haulers increasingly ask can-cleaning companies how they handle water before they sign.

How do bin and dumpster washing businesses stay compliant?

• Contain the work area: wash on a rack or pad, and block or cover nearby storm drain inlets.

• Capture every gallon: use a wash system with a recovery vacuum or an enclosed wash chamber that drains to a holding tank.

• Separate and filter: remove solids and grease before the water is stored, reused or discharged.

• Recycle where allowed: filtering and reusing wash water cuts fill-ups and the volume you must dispose of.

• Dispose and document: send wastewater to an approved sewer connection or hauler and keep records of where it went.

Why hot water matters for cans and dumpsters

Grease, food residue and the biofilm that causes odor break down faster with heat. Hot water cleans with less detergent and fewer passes, which means less wash water to capture. For dumpster pads and enclosures, hot water also lifts the grease film that cold water tends to spread around.

Where to go from here

If you are pricing equipment, see the bin washing systems on Hot And Mighty Direct, our buying-stage site: trash bin cleaning equipment, stationary and mobile, and how to add wash water recovery to an existing pressure washer.

Hot And Mighty has built custom hot water wash, recovery and recycling systems for more than 50 years, delivered nationwide. Tap "Text us" on this page or call 800-897-7515, Monday to Friday 9 to 5 EST, and tell us what you wash and where.

Frequently asked questions

Can I wash trash cans in the street if I use biodegradable soap?

No. Biodegradable does not mean non-polluting, and the water still carries food waste, grease and bacteria. Most cities ban any wash water from reaching the street or storm drain.

Can trash can wash water go on grass or landscaping?

Sometimes, for small amounts. San Diego and Lubbock allow wash water on landscaped or grassy areas in some cases, but rules vary and a commercial route usually produces too much water for that. Check with your city first.

Do I need a permit to run a mobile bin cleaning business?

Often, yes. Cities such as Fort Worth and Lubbock require mobile washers to register or carry a permit, and sewer districts may require a discharge permit and pretreatment.

What is the best way to handle wash water on a bin cleaning truck or trailer?

Capture it at the source with an enclosed wash chamber or a recovery vacuum, hold it in a tank, filter out solids and grease, then reuse or dispose of it at an approved point.

Is cleaning dumpster pads different from cleaning residential cans?

Yes. Pads and enclosures cover more area and carry heavier grease, so they need higher flow, hot water and a way to vacuum up water from the pavement.