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Mt. Diablo Resource Recovery offers both residential and commercial accounts a chance to help us recycle. We produce some of the best compost around, as well as a variety of bark.  Bark and compost are available for purchase. Compost by bulk for those large projects, or the bag for smaller needs.

Compost for Sale

MDRR, Contra Costa Waste Services sells some of the best compost in the county! Mixing compost into soil will have many benefits, like providing nutrients that help plants grow and helping the soil hold onto moisture. It can even help slow down weed growth. Compost is also good for preparing soil for new lawns and can also be used as a top dressing or mulch.

  • Bags: (1.5 cubic feet – 42.5 liters)  / $10 per bag, plus tax
  • Bulk: (1 ton – 2.22 cubic yards – 2000 lbs.)  / $70 plus tax

If you or your business is interested in purchasing compost, please call us at 925.473.0180, email us at [email protected]. (allow 24 business hours for email response) or come by our recycling center.

Mt. Diablo Recycling Center & Transfer Station is located at 1300 Loveridge Road in Pittsburg, just north of the old Pittsburg-Antioch Highway.

HOURS: Monday – Sunday 7:00 a.m. to 6:00 p.m. We are closed annually on Christmas and New Year’s Day.

How compost will benefit any lawn and garden

Lawn or top dressing

  • Spread a layer 1/4 inch thick over the area and rake it into the soil. Provide good deep watering after spreading. Add to planter boxes or planter beds to add nutrients and organic matter to your soil and plants.

Mulch

  • If you are using the compost as moisture-holding mulch, do exactly what you would do with any mulch. Spread it around plants, trees, and shrubs – in your garden or lawn. Just make sure there is a good 2 to 3 inches of mulch on the surface.

Soil Amendment

  • Use compost as soil amendment. Just dig anywhere from 2 to 4 inches down while raking in the compost, and mix in with the rest of the soil at planting time.

Bark for sale

Contra Costa Waste Services also sells bark in bulk. We sell black bark and natural bark (no colored added).

  • Black bark: $250 per ton, plus tax
  • Natural bark (no colored added): $200 per ton, plus tax

If you or your business is interested in purchasing bark, please call us at 925.473.0180, email us at [email protected]. (allow 24 hours for email response) or come by our recycling center.

Mt. Diablo Recycling Center & Transfer Station is located at 1300 Loveridge Road in Pittsburg, just north of the old Pittsburg-Antioch Highway.

HOURS: Monday – Sunday 7:00 a.m. to 6:00 p.m. We are closed annually on Christmas and New Year’s Day.

Free Christmas Tree Recycling

There are 2 easy ways to recycle your Christmas tree:

At the Curb: Please place your Christmas tree at the curb on your yard waste day and we will pick it up for you at no additional charge. If your tree is 5 ft. or taller, please cut it into lengths of no longer than 3 ft. Our trucks cannot pick-up anything longer than 3 feet in length.

Take it to Contra Costa Waste Services: (also known as the Recycling Center or Transfer Station – RCTS)  located at 1300 Loveridge Road in Pittsburg.  RCTS is open Monday – Sunday from 7 am to 6 pm (closed annually on Christmas Day & New Year’s Day).

  • Christmas trees will be taken at no charge – limit one tree per vehicle.
  • Please remove all tinsel, ornaments and tree stand.
  • Flocked trees cannot be recycled. Please cut down to no more than 3 feet in length and place them on the curb, on your garbage day.