Clean concrete from demolition, remodeling, landscaping and construction projects can often be recycled instead of disposed of as ordinary waste.
The historical WM Northern California/Nevada resource defined clean concrete as concrete that is free from contaminants and foreign materials such as soil, debris, organic matter and chemicals. It also identified recycling and reuse in applications such as road base, landscaping and aggregate as alternatives to landfill disposal.
Today, concrete remains an important part of the construction and demolition (C&D) recycling stream. CalRecycle identifies masonry—including concrete and brick—among common C&D materials that can potentially be reused or recycled.
The right disposal option depends on the condition of the concrete, the materials mixed with it, the amount generated and the requirements of the receiving facility.
What Is Clean Concrete?
For disposal and recycling purposes, clean concrete generally means concrete that has not been contaminated by waste, chemicals or materials that would interfere with its recovery or safe handling.
The archived clean-concrete page specifically distinguished clean concrete from concrete containing:
- Soil
- General debris
- Organic matter
- Chemicals
- Oil
- Heavy-metal contamination
- Other potentially hazardous substances
A concrete load that contains other demolition material may instead be classified as mixed concrete or general construction and demolition debris, depending on the facility.
That distinction matters because facilities may charge different rates, use different processing methods or reject contaminated loads.
Can Concrete Be Recycled?
Yes.
Concrete is one of the construction materials that can often be recovered through C&D recycling rather than being sent directly to landfill.
CalRecycle states that recycled aggregate is produced by crushing concrete and sometimes asphalt, with road base representing its primary market. Recycled aggregate can also help conserve natural aggregate resources and reduce the amount of construction material requiring disposal.
The basic recycling process can be understood as:
Concrete removal → source separation → inspection → crushing → sizing → recycled aggregate → new use
The exact processing method depends on the recycling facility and the quality of the incoming concrete.
What Is Recycled Concrete Aggregate?
When suitable concrete is processed, it can be crushed into smaller aggregate-sized material.
CalRecycle identifies recycled aggregate as material produced from crushed concrete and sometimes asphalt. Its uses can include road and construction applications, with road base being a major market.
Recovering aggregate from existing concrete can reduce demand for newly mined aggregate while keeping a heavy, reusable material out of the disposal stream.
Clean Concrete vs. Mixed Concrete
One of the most important distinctions for anyone disposing of concrete is whether the load is clean and source-separated or mixed with other demolition debris.
Clean Concrete
A clean concrete load is primarily concrete without unrelated trash, soil, organic material or chemical contamination.
Keeping concrete separate can make recycling easier because the receiving facility does not first need to separate significant amounts of unrelated material.
Mixed Concrete
Mixed concrete may be combined with materials such as:
- Wood
- Plastic
- Drywall
- Insulation
- Roofing debris
- General construction waste
- Other demolition materials
A mixed load may still qualify for a C&D recycling program, but it should not automatically be described as clean concrete.
CalRecycle identifies concrete, lumber, drywall, metals, carpet, plastics, pipes and cardboard as examples of materials found in construction and demolition waste streams.
Why Separate Concrete From Other Construction Waste?
Source separation can make material recovery more practical.
When concrete is kept separate from garbage and incompatible construction materials, it may be easier for a recycler to crush and process it into usable aggregate.
Separating materials at the jobsite can also help keep:
- Trash out of concrete loads
- Recyclable metals out of disposal
- Clean wood separate from mixed debris
- Hazardous material out of normal C&D waste
- Concrete suitable for aggregate recovery
California encourages reuse and recycling of C&D materials because many construction materials can be recovered rather than disposed of.
For contractors and project managers, the best approach is usually to identify material streams before demolition or cleanup begins.
What Can Make Concrete Unacceptable for Clean Recycling?
Not every concrete load qualifies as clean material.
Soil and Dirt
The archived resource specifically identified soil as a material that could prevent a concrete load from being considered clean.
A small amount of incidental dust is different from a load containing significant excavation soil, mud or mixed dirt.
Facilities determine their own acceptance standards, so ask before transporting mixed soil-and-concrete loads.
Household or Construction Trash
Plastic bags, insulation, drywall, carpet, packaging and general garbage can turn a source-separated concrete load into mixed C&D debris.
Organic Material
Leaves, branches, grass and other organic materials should generally be kept out of clean concrete loads.
Oil and Chemicals
The archived page warned that concrete contaminated with oil, chemicals or heavy metals may require special handling rather than ordinary concrete recycling.
Concrete from industrial properties, vehicle-maintenance areas or sites with known spills may require additional evaluation.
Hazardous Contamination
If there is reason to believe concrete has been exposed to hazardous substances, do not assume that it can be taken to a normal recycling center, transfer station or landfill.
CalRecycle notes that hazardous and universal wastes generated during construction and demolition require different management from ordinary C&D material.
Concrete From Construction and Demolition Projects
Concrete waste commonly comes from projects such as:
- Driveway removal
- Sidewalk replacement
- Patio demolition
- Foundation work
- Building demolition
- Concrete slab removal
- Retaining-wall projects
- Commercial renovation
- Road and infrastructure work
- Landscaping projects
Concrete is part of the broader construction and demolition debris category.
CalRecycle defines C&D materials broadly to include materials generated during construction, remodeling, repair, cleanup and demolition, and specifically includes masonry such as concrete and brick among common recoverable materials.
Large projects should identify the appropriate recycling or disposal facility before loading trucks or containers.
Should Concrete Go in a Regular Trash Dumpster?
Not automatically.
Concrete is extremely dense compared with ordinary household or commercial trash. A container that is physically only partly full of concrete can become very heavy.
For renovation or demolition work, users should confirm:
- Whether concrete is permitted in the container
- Whether a dedicated heavy-material container is required
- Maximum weight limits
- Whether concrete must be source-separated
- Whether dirt, brick or asphalt can be included
- What materials are prohibited
A dedicated concrete or C&D disposal solution may be more appropriate than mixing concrete into general waste.
Concrete Recycling in California
California has established C&D diversion and recycling programs because construction projects generate significant quantities of recoverable material.
CalRecycle states that reuse and recycling of C&D materials can sometimes be more economical than disposal and can conserve natural resources. Concrete and other masonry materials are specifically identified among the common materials in this stream.
Local requirements can differ by jurisdiction.
Contractors working on permitted construction or demolition projects should therefore check:
- Local C&D ordinances
- Diversion requirements
- Approved processing facilities
- Weight tickets or documentation requirements
- CALGreen-related requirements
- Project-specific permit conditions
CalRecycle notes that jurisdictions implement CALGreen requirements or more stringent local C&D rules where applicable.
Concrete Recycling in Northern Nevada
Northern Nevada construction and demolition projects can also generate concrete from residential development, commercial construction, road projects, property cleanouts and renovation.
The archived clean-concrete page historically connected this material with several Northern Nevada facilities, including Lockwood Landfill, Fernley Transfer Station, Incline Village Transfer Station and Sage Street Transfer Station.
However, historical inclusion should not be interpreted as proof that each facility accepts clean concrete today.
Current facility profiles often categorize material more broadly as C&D debris, municipal solid waste or another waste stream. Facility-specific acceptance should always be confirmed before transporting a heavy concrete load.
Current Examples of Concrete Recycling Facilities
Some facilities currently confirm concrete recycling more explicitly than others.
Guadalupe Recycling & Disposal Facility
Guadalupe Recycling & Disposal Facility in San Jose currently identifies concrete and asphalt among materials it accepts for recycling.
Its current operations information also identifies:
- Yard trimmings
- Clean soil
- Construction and demolition debris
- Scrap metal and appliances
as recycling streams.
Kirby Canyon Recycling & Disposal Facility
Kirby Canyon in Morgan Hill also currently states that it accepts and recycles:
- Concrete and asphalt
- Yard trimmings
- Clean soil
The facility checks incoming loads and rejects unacceptable material, reinforcing why concrete should be inspected and separated before transport.
Davis Street Resource Recovery Complex
Davis Street in San Leandro currently operates a dedicated construction and demolition recycling program and identifies an “inerts” recycling stream within its broader material-recovery services.
The historical clean-concrete page also specifically listed Davis Street among facilities associated with clean concrete.
Historically Listed Clean Concrete Facilities
The archived version of this page connected Concrete – Clean with 13 facilities across Northern California and Northern Nevada.
These relationships should be preserved for historical and semantic relevance, but the list should not be presented as a guarantee of current acceptance.
Facility services, addresses, fees and material classifications can change.
Bay Area
Redwood Landfill & Recycling Center
Novato, California
The archived clean-concrete page associated Redwood Landfill with clean concrete disposal or recycling.
Current facility information broadly lists construction and demolition debris among accepted non-hazardous materials, but it does not separately identify clean concrete on its standard WMSolutions material list.
Altamont Landfill & Resource Recovery Facility
Livermore, California
Altamont appeared in the historical clean-concrete facility directory.
Current facility information identifies construction and demolition debris among accepted non-hazardous materials. Concrete-specific requirements should be confirmed before delivery.
Davis Street Resource Recovery Complex
San Leandro, California
Davis Street was historically listed for clean concrete and currently maintains a C&D recycling program with an inerts material stream.
Guadalupe Recycling & Disposal Facility
San Jose, California
Guadalupe was historically associated with this material and currently explicitly identifies concrete and asphalt among its recycling streams.
Kirby Canyon Recycling & Disposal Facility
Morgan Hill, California
Kirby Canyon also maintains a strong historical and current concrete relationship. Its present operations information specifically says the facility recycles concrete and asphalt.
Sacramento Valley
Sacramento Recycling & Transfer Station
Sacramento, California
The historical clean-concrete page listed the Sacramento Recycling & Transfer Station among facilities associated with clean concrete.
Current WMSolutions information identifies construction and demolition debris as an accepted non-hazardous material at the facility, though its standard online list does not separately identify clean concrete.
Concrete-specific acceptance and rates should therefore be confirmed before drop-off.
San Joaquin Valley
Lodi Recycling Recovery & Transfer Station
Lodi, California
The original page historically identified the Lodi facility as a clean-concrete location.
Because current facility classifications have changed and may not explicitly identify concrete as a routine material, confirm acceptance before transporting a load.
Cal Sierra
Cal Sierra Transfer Station
Sonora, California
Cal Sierra Transfer Station appeared in the archived clean-concrete facility directory at 19309 Industrial Drive, Sonora.
Treat this as a historical facility relationship unless current concrete acceptance has been independently confirmed.
Shasta Cascades
Alturas Disposal Transfer Station
Alturas, California
The archived page listed Alturas Disposal Transfer Station among locations historically associated with clean concrete.
Current material requirements should be checked before transporting concrete.
Northern Nevada
Lockwood Regional Landfill
Sparks, Nevada
Lockwood Regional Landfill was historically listed on the clean-concrete page.
Current WMSolutions information identifies construction and demolition debris and clean soil among accepted non-hazardous categories, although concrete is not separately identified in the current online list.
Fernley Transfer Station
Fernley, Nevada
Fernley Transfer Station was historically associated with clean concrete on this page.
The archived address should not automatically be reused as current facility information because facility locations and receiving rules can change.
Incline Village Transfer Station
Incline Village, Nevada
The archived clean-concrete directory also included Incline Village Transfer Station.
Users should verify current concrete acceptance before making a self-haul trip.
Internal Link: [Incline Village Transfer Station]
Sage Street Transfer Station
Reno, Nevada
Sage Street Transfer Station in Reno was another facility historically connected with clean concrete on the old page.
Because current Sage/Commercial Row facility information does not necessarily mirror the historical accepted-material directory, concrete acceptance should be confirmed before transport.
How to Prepare Clean Concrete for Recycling
Proper preparation can increase the likelihood that a load can enter a concrete or inert-material recycling stream.
Keep Trash Out
Remove household waste, packaging, drywall, insulation and other unrelated debris.
Separate Soil Where Possible
Large amounts of soil or mud can change the classification of a concrete load.
If a demolition project generates both soil and concrete, keeping separate piles or containers can make disposal easier.
Keep Hazardous Contamination Out
Concrete exposed to oil, chemicals or other potentially hazardous substances should not be mixed with ordinary clean concrete. The archived resource specifically warned that contaminated concrete may require special handling.
Separate Other C&D Materials
Wood, cardboard, metals and other construction materials may have their own recycling streams.
CalRecycle specifically encourages reuse and recycling of multiple C&D materials, including concrete, lumber, drywall, metals and cardboard.
Ask About Reinforcement
Concrete from slabs, foundations and structural work may contain reinforcement or other embedded material.
Facility requirements vary, so confirm whether reinforced concrete is acceptable and whether size restrictions apply before loading.
Break Down Oversized Pieces When Required
Some recycling facilities may have maximum dimensions for concrete chunks.
Never assume that an intact slab or extremely large concrete section can be accepted without advance confirmation.
Concrete With Rebar
Concrete containing reinforcing steel is common in foundations, slabs and structural demolition.
Whether it qualifies for a particular clean-concrete recycling rate depends on the receiving facility.
Some processors can recover steel during concrete processing, while others may have specific restrictions on the amount, length or type of reinforcement.
For this reason, users should describe the load accurately as concrete with rebar when contacting a facility.
Do not represent reinforced concrete as completely clean or reinforcement-free unless it actually is.
Concrete Mixed With Asphalt
Concrete and asphalt are both common inert construction materials, but whether they may be delivered together depends on the facility.
For example, Guadalupe and Kirby Canyon currently describe concrete and asphalt together among their recycling streams.
That does not mean every facility accepts mixed concrete-and-asphalt loads.
Confirm requirements for your chosen destination.
Concrete Mixed With Brick or Masonry
Brick, block, tile and other masonry products may be generated alongside concrete during demolition.
CalRecycle groups brick and concrete within the broader masonry category of C&D material.
A facility may allow them in the same inert-material stream or require separation.
Ask before combining these materials.
What About Contaminated Concrete?
Concrete that has been affected by substances such as:
- Petroleum products
- Industrial chemicals
- Heavy metals
- Hazardous coatings
- Unknown contamination
should not automatically be delivered as clean concrete.
The archived page specifically warned that concrete contaminated by oil, chemicals or heavy metals could require hazardous-waste handling.
The correct management method depends on the contaminant, its concentration and applicable regulations.
When contamination is suspected, contact the receiving facility or an appropriate environmental-waste professional before moving the material.
Clean Concrete From Residential Projects
Homeowners can generate concrete during relatively common improvement projects such as:
- Replacing a driveway
- Removing a patio
- Repairing a walkway
- Removing garden curbing
- Demolishing a small slab
- Replacing concrete steps
- Landscape renovation
Before beginning a project, estimate the amount of concrete and determine where it will go.
Small quantities may be suitable for self-haul where permitted. Large quantities may require a dedicated container or hauling service because concrete becomes very heavy quickly.
Clean Concrete From Commercial Projects
Commercial demolition and construction projects typically need more planning because loads can be larger and diversion documentation may be required.
Project teams should consider:
- Source separation
- Container placement
- Concrete recycling
- C&D diversion requirements
- Weight documentation
- Approved facilities
- Load contamination
- Hauling frequency
CalRecycle notes that local jurisdictions may maintain their own construction and demolition diversion requirements and facility information.
Is Recycling Concrete Better Than Landfill Disposal?
When concrete is suitable for recycling and a recycling option is reasonably available, recovery can provide several advantages.
CalRecycle identifies benefits of recycled aggregate that include conserving natural aggregate resources, potential cost savings and energy savings when material can be recycled on site.
Concrete is also heavy and occupies disposal capacity despite being composed largely of material that can potentially be processed again.
The practical hierarchy is therefore:
Reuse when practical → Recycle into aggregate → Dispose when recycling is unavailable or unsuitable
The correct option still depends on contamination, facility availability and project requirements.
Before Taking Concrete to a Facility
Never rely solely on an old accepted-material directory.
Before loading concrete for transport:
- Identify whether the load is clean concrete, reinforced concrete, mixed concrete or general C&D debris.
- Remove unrelated trash and organic material.
- Check for oil, chemicals or other contamination.
- Ask whether rebar is allowed.
- Confirm maximum piece sizes.
- Verify whether brick, asphalt or dirt may be mixed into the load.
- Check current facility hours.
- Ask about minimum charges and per-ton rates.
- Confirm payment methods.
- Secure the load during transportation.
CalRecycle specifically recommends checking with the receiving facility before taking C&D material because disposal and recycling options vary.
Clean Concrete Recycling FAQs
What is considered clean concrete?
The historical WM Northern California/Nevada definition described clean concrete as material free from contaminants or foreign material such as soil, debris, organic matter and chemicals.
Individual recycling facilities may apply more specific acceptance standards.
Can old concrete be recycled?
Yes. Suitable concrete can be crushed and processed into recycled aggregate. CalRecycle identifies road base as a primary market for recycled aggregate.
What can recycled concrete be used for?
Recycled concrete aggregate can be used in applications such as road-base and other aggregate uses. The historical page also referenced landscaping and aggregate reuse.
Is clean concrete considered construction debris?
Concrete commonly forms part of the construction and demolition material stream, although a source-separated clean-concrete load may be handled separately from mixed C&D debris. CalRecycle specifically includes concrete among common C&D materials.
Can concrete with dirt be recycled?
Possibly, but it may no longer qualify for a facility’s clean-concrete category.
The historical page specifically identified soil as a material that should not be present in clean concrete.
Ask the receiving facility whether it accepts mixed concrete and soil.
Can concrete with rebar be recycled?
Some concrete-processing operations can handle reinforced concrete, but facility requirements differ.
Always tell the receiving facility that the load contains rebar and ask about size or reinforcement restrictions before delivery.
Can contaminated concrete go into a clean concrete pile?
No. Concrete suspected of chemical, oil, heavy-metal or hazardous contamination should not be intentionally mixed with uncontaminated concrete.
The archived resource specifically warned that contaminated concrete may require special handling or disposal.
Where can I recycle concrete in the Bay Area?
Current WM facility information explicitly identifies Guadalupe Recycling & Disposal Facility in San Jose and Kirby Canyon in Morgan Hill as recycling concrete and asphalt. Davis Street in San Leandro also maintains an active C&D and inerts recycling program.
Where can I dispose of concrete in Northern Nevada?
The historical clean-concrete page listed Lockwood Landfill, Fernley Transfer Station, Incline Village Transfer Station and Sage Street Transfer Station as Northern Nevada facilities associated with the material.
Because current acceptance can differ from historical listings, confirm concrete requirements with the individual facility before visiting.
Does Sacramento Recycling & Transfer Station accept concrete?
The historical page listed Sacramento Recycling & Transfer Station as a clean-concrete facility. Its current WMSolutions profile confirms construction and demolition debris, but does not separately identify clean concrete in the standard online list.
Confirm concrete-specific acceptance before drop-off.
Does Lodi Transfer Station accept clean concrete?
Lodi Recycling Recovery & Transfer Station appeared on the historical clean-concrete facility list.
Current acceptance should be verified directly rather than assuming the historical concrete policy remains unchanged.
Find a Clean Concrete Recycling or Disposal Option
Concrete does not always need to become landfill waste.
When a load is uncontaminated and appropriately separated, concrete can potentially be processed into recycled aggregate and used again in construction-related applications.
The key is to correctly identify the material before choosing a destination:
Clean concrete → look for concrete/inert recycling
Mixed construction debris → use an appropriate C&D facility
Concrete with suspected contamination → obtain specialized disposal guidance
Large project quantities → consider a dedicated construction container or hauling solution
Always confirm the facility’s current material specifications, hours, rates and load requirements before transporting concrete.
Explore Related Resources
[Accepted Materials] · [Mixed Concrete] · [Construction & Demolition Debris] · [Bay Area Waste & Recycling Services] · [Northern Nevada Waste & Recycling Services] · [Davis Street Transfer Station] · [Sacramento Recycling Center] · [Lodi Transfer Station]