{"entity":{"iso2":"ES","iso3":"ESP","name":"Spain","slug":"spain"},"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":"1993-01-01","value":9.88912},{"date":"1994-01-01","value":9.88912},{"date":"1995-01-01","value":9.37869},{"date":"1996-01-01","value":12.573},{"date":"1997-01-01","value":12.573},{"date":"1999-01-01","value":4.00201},{"date":"2000-01-01","value":6.07263},{"date":"2001-01-01","value":8.37183},{"date":"2002-01-01","value":26.9537},{"date":"2003-01-01","value":26.717},{"date":"2004-01-01","value":34.7554},{"date":"2005-01-01","value":38.3501},{"date":"2006-01-01","value":38.605},{"date":"2015-01-01","value":33.7974},{"date":"2016-01-01","value":27.6515},{"date":"2017-01-01","value":35.5062},{"date":"2018-01-01","value":39.2222},{"date":"2019-01-01","value":38.09},{"date":"2020-01-01","value":36.6978},{"date":"2021-01-01","value":36.9262}],"summary":{"latest_period":"2021-01-01","latest_value":36.9262,"max":39.2222,"mean":24.3011,"min":4.00201,"of":34,"rank":2,"trend":"volatile"}}