These data contain ammonia concentration measurements using line-integrated miniDOAS instruments and emission calculations using an inverse dispersion method applying the bLS model at an experimental dairy housing operated by Agroscope in Tänikon, Switzerland during several months from September to December 2018. The data are described in a manuscript titled "Ammonia emissions from a dairy housing and wastewater treatment plant quantified with an inverse dispersion method accounting for deposition loss" submitted to the Journal of Air & Waste Management in 2023. These measurements were funded by the Swiss Federal Office for the Environment (Contract 00.5082.P2I R254-0652).