Free Green Materials Drop-off Dates 2019

5575 Nicasio Valley Rd., Nicasio, CA 94946.
415 662 9849

The 2019 free yard debris drop off dates are :

June 8th and 9th
July 6th and 7th

9:00 am to 3:30 pm

This is your opportunity for free and safe disposal of yard debris such as branches, grass and brush. No building materials, general debris or garbage and no palm trees please.  Marin residents only!  Proof of residency may be required.

The program is set up to remove vegetation/debris to create defensible space and increase the chances of their homes surviving a wildfire. Learn more.

Location:  5575 Nicasio Valley Rd., Nicasio.  Across from the  Nicasio Corporation Yard. See map

Sponsored by:
Marin County Board of Supervisors,
Marin County Fire Department & West Marin Compost

For more information call:  415-473-6717

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West Marin Compost Drop-Off site

West Marin Compost is now open to help you prepare your yard and garden for spring!!

5575 Nicasio Valley Road, Nicasio (across from the County corporation yard). See map.
Open Monday through Saturday from 7:00 am – 3:30 pm.
Tipping fee is $20.00 per cubic yard.

We now also have a line of soil amendments that suit your every need. See the Products page.

We are Accepting Clean Green Material only.
Not accepted – noxious weeds or animal waste, food scraps, compostable plastics and other non-green materials.
For manure hauling services cal 415 662 9849

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Seasonal Specials

Seasonal Sale!
From time to time we may offer seasonal products on sale. Check here for what may be available.
Fall Special: There are currently no sales
Note however that we have started a 20+ cubic yard discount on Tree Mulch, Ultra-Light Mulch and Path Mulch.  

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Grant will reduce methane emissions by 80%, while making a better compost

West Marin Compost is very pleased to announce that a proposal they wrote on behalf of the Lafranchi Dairy was awarded a $744,000.00 grant to convert the dairy from a wet flush manure collection system to a dry scrape system.  Under the current system, water flushes manure out of the barns.  The slurry enters a manure separator and the liquid runs into a manure pond. This liquid is like a manure tea, rich in nutrients and carbon.  As a result, as the manure tea sits in the pond, methane is produced.  The dry scrape system will eliminate the flushing.  The nutrients will remain in the manure and very little manure water will enter the pond.  What does enter the pond can be used to bring the compost to optimum moisture levels.  The now more nutrient rich manure will enhance the compost produced.  This is a win-win-win scenario for the dairy, the compost operation and the environment.


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Bioremediation for Fire Affected Sonoma County

West Marin Compost is constructing free wattles (for fire relief), which have been inoculated with mycelium to provide bioremediation for the fire affected lands in Sonoma County.  The wattles, long 8″ diameter socks that are filled with straw, compost and mulch, will be placed in areas where the risk of run-off of water contaminated with oil, gas, pesticides, leaded paints, chemicals, etc. is a risk to the environment, particularly our water resources.

The Lafranchi Family have donated all of the straw bales from the Nicasio Pumpkin Patch.  Chip StrawGourmet Mushroom, Inc. is providing the fungi.  Clean River Alliance transports the fungi substrate to our facility. Many volunteers are chipping in providing labor to put the whole package together with West Marin Compost providing compost, mulch, wattle socks, equipment, labor, coordination and transportation.

Volunteering is on hold.  Stay tuned


How does it work?  The wattles will provide erosion control by slowing down the water, allowing sediment to settle out and reducing the energy of the water.  Compost in the wattles has the ability to immobilize heavy metals, thereby removing them from the environment.  The microbes in the wattles see hydrocarbons (gas, oil, many pesticides) as a food source and will break them down.  The added fungi are vey good in filtering out heavy metals, chemicals and hydrocarbons.  We are building bioreactors, where nature can do its work to clean up.

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What about noxious weeds?

Does West Marin Compost accept noxious weeds, and what happens to weeds in the composting process?

WMC does accept almost all “weeds.”  Except for Tim.

In all seriousness, most weeds and weed seeds are destroyed by the high

temperatures of the thermophilic composting process.  One notable exception is

the seeds of common garden morning glory (Convolvulus arvensis), which have

 been shown to survive temperatures of up to 180 F.  Consequently, we do not

accept this material at the drop off site.   

Most other plant material is accepted.


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Donate your old Pitchforks!

Donate an old pitchfork and receive a 10% discount on your tipping fee! Old pitchforks will be used in the creation of the new welded gate at the drop-off site!! Call Nancy at 415 662 9849.


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How is the compost made?


Dairy manure separator solids are combined with approximately equal volumes of green and equestrian materials, formed into windrows on the composting pad and watered as needed. Any runoff from the compost area flows to the dairy’s liquid waste storage ponds. Windrows are managed in accordance with CAL Recycle (and Nicasio Blend under the USDA National Organic Program (NOP)) guidelines to reduce pathogens and weed viability to negligible levels.  A mechanical screen is used to separate coarse from fine material at the end of the process.



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