Back to blog
Article

Capacity of Collection Tanks in Mobile Toilets

Admin October 02, 2026

The capacity of collection tanks in mobile toilets varies depending on the type, number of toilet stalls, and usage scenarios, as detailed below:

Small single-unit mobile public toilets:

  • The capacity of conventional sewage collection tanks is 50-100 liters, suitable for parks or temporary events.
  • For some small single-unit toilets designed for an average daily usage of 50-100 people, the capacity of the sewage storage tank can reach 200-300 liters.
  • The small-sized model of single-unit air-water flushing mobile toilets has a fecal storage tank capacity of 500-800 liters, suitable for small construction sites, temporary inspection stations, and other scenarios with a relatively low daily usage (about 50-100 people), allowing for 2-3 days of use before cleaning.

Medium-sized mobile public toilets:

  • Medium-sized mobile public toilets with 2-3 toilet stalls have a sewage collection tank capacity of approximately 100-300 liters.
  • The capacity of medium-sized trailer-mounted toilets (used on construction sites or for long-term outdoor operations) is 400-600 liters, supporting 3-5 days without sewage removal.
  • The medium-sized fecal storage tank of single-unit air-water flushing mobile toilets has a capacity of 800-1200 liters, suitable for medium-scale events such as outdoor exhibitions and small music festivals, serving 100-200 people per day and typically maintaining a 1-2 day usage cycle.

Large mobile public toilets:

  • Large mobile public toilets with 4-6 or more toilet stalls have a sewage collection tank capacity of approximately 300-800 liters, with some large public toilets equipped with large-capacity collection tanks of over 1000 liters.
  • Large container toilets (commonly seen at large events such as music festivals) can have a capacity of 800-1000 liters, with some models equipped with dual sewage storage tanks.
  • The large-capacity fecal storage tank of single-unit air-water flushing mobile toilets can reach 1200-1500 liters, mainly used for high-traffic scenarios such as sports events and large gatherings, serving 200-300 people per day and reducing the frequency of cleaning.

The design of collection tank capacities for different types of mobile toilets should comprehensively consider usage scenarios, foot traffic, and cleaning cycles to ensure hygiene and practicality.