USDA Rural Development services include:

• Helping rural residents buy or rent safe, affordable housing and making health and safety repairs to their homes.
• Loans, grants, and loan guarantees to help create jobs and support economic development and essential services such as housing; health care; first responder services and equipment; and water, electric, and communications infrastructure.
• Technical assistance and information to help agricultural producers and cooperatives get started and improve the effectiveness of their operations.

See a comprehensive list of of programs in the document called USDA Rural Development Summary of Programs.

The document has program information for:

• single family housing
• multifamily house
• community programs
• energy and electric programs
• telecommunications programs
• water and environmental programs
• business and cooperative programs

Web pages

• USDA Rural Development Summary of Programs - https://www.rd.usda.gov/sites/default/files/RD_ProgramMatrix.pdf
• Contact info - https://www.rd.usda.gov/contact-page/california-contacts