In Oregon, off grid waste management is subject to state regulations regarding septic systems. A permit is required for the installation of a septic system, and the regulations vary depending on the county and zone classification. Typically, a permit is required for properties that will be occupied for more than 21 days in a six-month period. It is important to note that composting toilets and outhouse latrines are legal in Oregon, but they must meet specific requirements. As such, those planning to live off-grid in Oregon should research and comply with the state's septic regulations to ensure that their waste management system is in compliance with the law.