{"entity":{"iso2":"PL","iso3":"POL","name":"Poland","slug":"poland"},"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":"2003-01-01","value":8.56553},{"date":"2004-01-01","value":7.93976},{"date":"2005-01-01","value":7.7},{"date":"2006-01-01","value":9.09305},{"date":"2007-01-01","value":8.01129},{"date":"2008-01-01","value":8.48128},{"date":"2009-01-01","value":11.257},{"date":"2010-01-01","value":12.1556},{"date":"2011-01-01","value":8.789},{"date":"2012-01-01","value":8.73804},{"date":"2013-01-01","value":9.26519},{"date":"2014-01-01","value":12.361},{"date":"2015-01-01","value":11.8129},{"date":"2016-01-01","value":11.9134},{"date":"2017-01-01","value":12.3453},{"date":"2018-01-01","value":9.03478},{"date":"2019-01-01","value":9.12601},{"date":"2020-01-01","value":8.58584},{"date":"2021-01-01","value":8.61825}],"summary":{"latest_period":"2021-01-01","latest_value":8.61825,"max":12.361,"mean":9.67332,"min":7.7,"of":34,"rank":25,"trend":"rising"}}