Only three subpopulations of N. suratensis are known to be extant; a fourth subpopulation at Tha Chana has apparently been wiped out. The only subpopulation to be accurately surveyed consists of around 250 mature plants and is likely to be the largest; the other two are known only from anecdotal reports and are probably "much smaller". None of the subpopulations grow within protected areas and the species is not subject to any conservation measures. Extensive field work in the region has established the species's present range "with a high degree of confidence" and a wider distribution across Thailand is therefore unlikely. Nepenthes suratensis is listed as Critically Endangered on the IUCN Red List of Threatened Species on account of the surveyed subpopulation's predicted decline of ≥80% over the next three years as a result of planned urban development.
