Abstract: ObjectiveTo explore the feasibility and applicability of modified integrated index model (MIIM) for evaluation of hygienic detection results of newly-built rail transit stations.MethodsIndexes and criteria for evaluation were determined according to GB 9672-1996 and WS 394-2012. MIIM described in WS/T 199-2001 was used to comprehensively evaluate detection results (including temperature, carbon monoxide, carbon dioxide, inhalable particulate matter ［PM］ in the air, total bacterial count ［TBC］ in the air, TBC in the supply air, total fungal count ［TFC］ in the supply air in the supply air, environmental cleanliness, and cleanliness of fresh-air inlet, filters, cooling tower, return air opening, air outlet, and machine room) of four newly-built high-speed railway and inter-city stations in a city of Guangdong Province. ResultsAmong the four stations, the TFC in the supply air of the central air conditioning system in Station B, and TBC in the air of Station C and in the supply air of central air conditioning system in Station C were unqualified. Field hygiene survey results showed that the average score was 50 points for the environmental cleanliness, fresh-air inlet, filters, and machine room in C station. The analysis results of MIIM showed that the comprehensive indices of four stations, A, B, C, and D were 1.00, 1.58, 1.94, and 1.19, respectively. The hygiene rating was qualified for Station A as Grade II, but not qualified for the other three as Grade III.ConclusionMIIM achieved the overall rating and classification sorting and can be used to evaluate the hygiene status of rail transit stations.