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Thus, we analyzed with parallel coordinate visualization (PCV) plots what features may influence the water\u2013rock interaction and promote high-radon concentrations in water intended for human consumption. The results show that in granitic areas composed by biotite granites (Group V), although there is a higher radon production in the rocks, the radon transfer to groundwater was not effective, mainly due to the physical and chemical properties of the water. The main conclusions show that in all springs sampled (n = 69) for the entire study area, there are only four springs that must have an immediate intervention, and 22 of them are above the limit imposed by the Portuguese legislation. These results are intended to promote a Portuguese Action Plan for Radon that can be framed in the guidelines on the management and protection of groundwater resources.<\/jats:p>","DOI":"10.3390\/w11040760","type":"journal-article","created":{"date-parts":[[2019,4,12]],"date-time":"2019-04-12T12:55:04Z","timestamp":1555073704000},"page":"760","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["A New Framework for the Management and Radiological Protection of Groundwater Resources: The Implementation of a Portuguese Action Plan for Radon in Drinking Water and Impacts on Human Health"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7140-9036","authenticated-orcid":false,"given":"Lisa","family":"Martins","sequence":"first","affiliation":[{"name":"Department of Geology, Centre for Research and Technology of Agro-Environment and Biological Science, University of Tr\u00e1s-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal"}]},{"given":"Alcides","family":"Pereira","sequence":"additional","affiliation":[{"name":"Department of Earth Sciences, Centre for Earth and Space Research of the University of Coimbra, Rua S\u00edlvio Lima, Polo II University of Coimbra, 3004-531 Coimbra, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2465-2698","authenticated-orcid":false,"given":"Alcino","family":"Oliveira","sequence":"additional","affiliation":[{"name":"Department of Geology, Geosciences Centre of the University of Coimbra, University of Tr\u00e1s-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9486-7160","authenticated-orcid":false,"given":"Lu\u00eds F.","family":"Sanches Fernandes","sequence":"additional","affiliation":[{"name":"Department of Civil Engineering, Centre for Research and Technology of Agro-Environment and Biological Science, University of Tr\u00e1s-os-Montes and Alto Douro, 5001-801 Vila Real, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2399-5261","authenticated-orcid":false,"given":"Fernando A.L.","family":"Pacheco","sequence":"additional","affiliation":[{"name":"Department of Geology, Chemistry Research Centre, University of Tr\u00e1s-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2019,4,12]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"129","DOI":"10.1023\/A:1021718929576","article-title":"Application of Correspondence Analysis in the Assessment of Groundwater Chemistry","volume":"30","author":"Pacheco","year":"1998","journal-title":"Math. 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