At Sea: When offshore and/or outside of the legal limits of the United States, the solids can be taken to the edge of the boat and dumped overboard. However, dumping naturally produced matter in US inland lakes and coastal areas is illegal and environmentally unsound due to potential high concentrations of waste, which can lead to elevated algae growth and harm to oxygen-breathing aquatic species. The Air Head Composting Toilet allows cruisers to fill up while at anchor and dump during passages, avoiding contamination of the beautiful, clear tropical waters. The solid tank should hold about a month’s worth of everyday use for a couple.On Land: For regular use at home, solids from your Air Head should be emptied into a dedicated compost pile or bin, where they will further decompose into usable compost for non-edible plants. When away from home, the solids can be placed in a plastic bag and disposed of in a trash receptacle. For two people using the Air Head Composting Toilet every weekend, the solid tank can be emptied once a season, provided it has sufficient time to dry or break down. After a season’s worth of use, the contents of the solid tank will be dry or slightly moist, with a slight musty smell. It’s best to empty the tank the following spring during commissioning.