Analysis of the variation of milk quality in Colombia 2008-2019

Objective. This study aims to quantify changes by regions in the hygienic and compositional quality of milk collected formally in Colombia between 2008 and 2019 concerning the issuance and entry into force of regulations. Materials and methods. 144 monthly reports on the hygienic and compositional quality of the formally collected milk were used for each milk-producing region of Colombia consolidated by the USP-MADR (Milk Price Monitoring Unit of the Ministry of Agriculture and Rural Development in Colombia). With these reports, three study periods were identified, separated by the implementation of resolutions 017/2012 and 468/2015. The obtained data were analyzed under the quantile regression scheme. Results.Differences were found between the analyzed periods for hygienic quality and compositional quality in each region. Hygienic quality yielded the highest variation, which was most evident in region 2. Differences were present in the compositional quality of formally collected milk in Colombia between the periods associated with the entry into force of the regulations, mainly in region 1. Conclusions. The implementation of the regulations exerted influence on the hygienic and compositional quality of formally collected milk in Colombia.