Onsite Wastewater Treatment System (OWTS), or septic system, permits are required for any building creating wastewater flow in the six counties under NCHD's jurisdiction that are not connected to a city sewer system. Any new system or repair of an existing system requires a permit from the health department. In addition, there are also times when property is sold that lenders may ask us to do an inspection of the property to ensure the OWTS is working properly. In all of these cases we inspect the system to ensure compliance with the regulations approved by the Northeast Colorado Board of Health.