California dairy farms are preventing the production of methane and using manure nutrients wisely.

  • The California Department of Food and Agriculture’s Alternative Manure Management Program (AMMP) provides financial assistance for California dairy farm families as they reduce methane emissions through a variety of  technologies and strategies.


  • A total of 114 AMMP projects have been awarded grants to date. Projects selected include mechanical solids-liquid separation with drying, conversion of flush systems to scrape with dry manure storage or composting, and compost pack barns. ​​

  • These projects prevent the production of methane by promoting drier handling and storage of manure nutrients. 

  • The AMMP follows the DDRDP as one of the most cost-effective programs (ranked 13th of 71 climate programs), providing one ton of GHG reduction (CO2e) for every $62 invested by the state.

  • AMMP projects promote dry handling of manure, which can be a significant first step in producing a valuable and exportable source of organic matter for building healthy soils.​

  • These projects are currently in various states of development throughout 13 California counties, including communities on the coast and in the San Joaquin Valley.​



​Learn more about the Alternative Manure Management Program in the Annual Report to the Legislature on California Climate Investments Using Cap-and-Trade Auction Proceeds. You can also download the following resources.

Explore the print-friendly map, and learn about the state's dairy methane reduction efforts, including the adoption of digesters.


What do AMMP projects look like?

Dairy digesters capture methane to produce renewable energy


Where pasture-based management is possible, manure is left to dry and decompose, to return to the soil.

California dairy farmer with methane digester


The AMMP can help finance compost enhancement projects, supporting the use of dairy manure as an organic soil amendment.

dairy digesters in California

Solid Separators

Separators remove solid particles after manure is flushed from barn floors, and before it enters a storage lagoon. The remaining solid fibers can be dried and used as organic compost and/or bedding.

Dairy digesters capture methane to produce renewable energy

Dry Manure Handling

Vacuum trucks, such as the one above, or other scrape (non-flush) manure management technologies help avoid adding water to the manure. This makes it easier to dry the manure and manage it as a source of organic nitrogen.


Research and Innovation

All across California, dairy families are leading the nation in adoption of technologies and practices like these, combined with other innovative practices such as dairy manure digesters. Already leading the world with the smallest carbon footprint per gallon of milk produced, our dairy families continue to innovate, creating new kinds of economic and environmental value from their farms, improving their environmental performance in the process. Dairy families work closely with their partners in government, academia, and the private sector to make sure California is recognized around the world as the leading source of sustainable, high-quality, safe and nutritious dairy products.

Dairy Cares