The species faces no known major widespread threats. However, its population seem to be declining and, due to its small area of occupancy, it is close to meet a threatened category under criteria B2. It is therefore listed as Near Threatened.

This species is found in Europe, North and central Africa, temperate Asia, North and Central America.

In North Africa it is restricted to Egypt and Algeria. Also recorded from Ethiopia and Sudan. It has a small area of occupancy, under 500 km² in North Africa in total.

There is no information available on the population numbers or trends.

This species occurs in large water bodies, deep lakes and reservoirs, rivers, streams, canals. It is frequent in mesotrophic and eutrophic waters and occasionally found in oligotrophic lakes. P. perfoliatus tolerates intermediate water sulphates and hydrosoil potassium concentrations.

There are no major threats to this species.

No specific measures are in place or needed.