The Mexican Mosquito Fern is considered threatened on a provincial and national status. This status reflects both the few sites and their susceptibility to disturbance. The North Thompson localities are apparently no more secure than other Canadian localities. Potential threats include herbicides, accumulating salt from winter road de-icing programs, and leakage of diesel oil or gasoline in the event of an accident on the adjacent highway. Though little can be done to reduce the last of these threats, the North Thompson sites should be protected against salt and herbicides.
Drought conditions cause the ponds in which the ferns live to dry up much earlier than usual.
Past threats to the habitat required by the Mosquito Fern are from in-filling of suitable backwater sites at Sicamous for the development of housing and road construction. Ponds where the fern had been reported to be abundant at the beginning of the century have been damaged and destroyed. Today major travel corridors adjacent to the three best known sites are the main threats. If a railway tanker car containing toxic chemicals was to spill into the embayment at the Salmon Arm site, the plants could be eradicated. Similarly, a railway tanker car accident at or near the approach to the Sicamous Narrows Bridge could destroy the Sicamous station.