{"entity":{"iso2":"PT","iso3":"PRT","name":"Portugal","slug":"portugal"},"indicator":{"licence":"CC BY 4.0 (Our World in Data)","slug":"average-nitrate-concentration-in-freshwater","source":"European Environment Agency (2023) \u2013 with minor processing by Our World in Data","source_url":"https://ourworldindata.org/grapher/average-nitrate-concentration-in-freshwater","title":"Average nitrate concentration in freshwater","unit":"milligrams per litre"},"observations":[{"date":"1992-01-01","value":21.4483},{"date":"1993-01-01","value":21.4483},{"date":"1994-01-01","value":25.0244},{"date":"1995-01-01","value":25.0244},{"date":"1996-01-01","value":58.7733},{"date":"1997-01-01","value":55.7265},{"date":"1998-01-01","value":36.6675},{"date":"1999-01-01","value":21.3251},{"date":"2000-01-01","value":19.3968},{"date":"2001-01-01","value":27.5679},{"date":"2002-01-01","value":27.1968},{"date":"2003-01-01","value":24.5629},{"date":"2004-01-01","value":26.2154},{"date":"2005-01-01","value":17.3144},{"date":"2006-01-01","value":18.6989},{"date":"2007-01-01","value":18.1228},{"date":"2008-01-01","value":17.2535},{"date":"2009-01-01","value":16.2542},{"date":"2010-01-01","value":16.9826},{"date":"2011-01-01","value":16.2816},{"date":"2012-01-01","value":16.5603},{"date":"2013-01-01","value":14.6976},{"date":"2014-01-01","value":13.5258},{"date":"2015-01-01","value":14.7747},{"date":"2016-01-01","value":14.8817},{"date":"2017-01-01","value":15.812},{"date":"2018-01-01","value":15.7564},{"date":"2019-01-01","value":15.1273},{"date":"2020-01-01","value":15.4003},{"date":"2021-01-01","value":16.122}],"summary":{"latest_period":"2021-01-01","latest_value":16.122,"max":58.7733,"mean":22.1315,"min":13.5258,"of":34,"rank":17,"trend":"falling"}}