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Available in 40 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-40" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">40 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AC%D8%B2%D8%A1_%D9%81%D9%8A_%D8%A7%D9%84%D9%85%D9%84%D9%8A%D9%88%D9%86" title="جزء في المليون – Arabic" lang="ar" hreflang="ar" data-title="جزء في المليون" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Partes_per_mill%C3%B3n" title="Partes per millón – Asturian" lang="ast" hreflang="ast" data-title="Partes per millón" data-language-autonym="Asturianu" data-language-local-name="Asturian" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Ppm" title="Ppm – Minnan" lang="nan" hreflang="nan" data-title="Ppm" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="Minnan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Parts_per_million" title="Parts per million – Bosnian" lang="bs" hreflang="bs" data-title="Parts per million" data-language-autonym="Bosanski" data-language-local-name="Bosnian" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Part_per_mili%C3%B3" title="Part per milió – Catalan" lang="ca" hreflang="ca" data-title="Part per milió" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Parts_per_million" title="Parts per million – Czech" lang="cs" hreflang="cs" data-title="Parts per million" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Parts_per_million" title="Parts per million – Danish" lang="da" hreflang="da" data-title="Parts per million" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Parts_per_million" title="Parts per million – German" lang="de" hreflang="de" data-title="Parts per million" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Miljondikosa" title="Miljondikosa – Estonian" lang="et" hreflang="et" data-title="Miljondikosa" data-language-autonym="Eesti" data-language-local-name="Estonian" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/Parts_per_(%CF%80%CE%BF%CF%83%CE%BF%CF%83%CF%84%CE%B9%CE%B1%CE%AF%CE%B1_%CE%BC%CE%BF%CE%BD%CE%AC%CE%B4%CE%B1)" title="Parts per (ποσοστιαία μονάδα) – Greek" lang="el" hreflang="el" data-title="Parts per (ποσοστιαία μονάδα)" data-language-autonym="Ελληνικά" data-language-local-name="Greek" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en badge-Q70893996 mw-list-item" title=""><a href="https://en.wikipedia.org/wiki/Parts_per_million" title="Parts per million – English" lang="en" hreflang="en" data-title="Parts per million" data-language-autonym="English" data-language-local-name="English" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Partes_por_mill%C3%B3n" title="Partes por millón – Spanish" lang="es" hreflang="es" data-title="Partes por millón" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Milioiko_parte" title="Milioiko parte – Basque" lang="eu" hreflang="eu" data-title="Milioiko parte" data-language-autonym="Euskara" data-language-local-name="Basque" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Partie_par_million" title="Partie par million – French" lang="fr" hreflang="fr" data-title="Partie par million" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Partes_por_mill%C3%B3n" title="Partes por millón – Galician" lang="gl" hreflang="gl" data-title="Partes por millón" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/Ppm" title="Ppm – Korean" lang="ko" hreflang="ko" data-title="Ppm" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Parti_per_milione" title="Parti per milione – Italian" lang="it" hreflang="it" data-title="Parti per milione" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Parts_per_million" title="Parts per million – Swahili" lang="sw" hreflang="sw" data-title="Parts per million" data-language-autonym="Kiswahili" data-language-local-name="Swahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Ppm" title="Ppm – Lithuanian" lang="lt" hreflang="lt" data-title="Ppm" data-language-autonym="Lietuvių" data-language-local-name="Lithuanian" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-li mw-list-item"><a href="https://li.wikipedia.org/wiki/Ppm" title="Ppm – Limburgish" lang="li" hreflang="li" data-title="Ppm" data-language-autonym="Limburgs" data-language-local-name="Limburgish" class="interlanguage-link-target"><span>Limburgs</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Parts_per_million" title="Parts per million – Dutch" lang="nl" hreflang="nl" data-title="Parts per million" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/Ppm" title="Ppm – Japanese" lang="ja" hreflang="ja" data-title="Ppm" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-frr mw-list-item"><a href="https://frr.wikipedia.org/wiki/Ppm" title="Ppm – Northern Frisian" lang="frr" hreflang="frr" data-title="Ppm" data-language-autonym="Nordfriisk" data-language-local-name="Northern Frisian" class="interlanguage-link-target"><span>Nordfriisk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Andeler_per_million" title="Andeler per million – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Andeler per million" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Parts_per_million" title="Parts per million – Norwegian Nynorsk" lang="nn" hreflang="nn" data-title="Parts per million" data-language-autonym="Norsk nynorsk" data-language-local-name="Norwegian Nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Parts_per_million" title="Parts per million – Low German" lang="nds" hreflang="nds" data-title="Parts per million" data-language-autonym="Plattdüütsch" data-language-local-name="Low German" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Parte_por_milh%C3%A3o" title="Parte por milhão – Portuguese" lang="pt" hreflang="pt" data-title="Parte por milhão" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Ppm" title="Ppm – Romanian" lang="ro" hreflang="ro" data-title="Ppm" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9C%D0%B8%D0%BB%D0%BB%D0%B8%D0%BE%D0%BD%D0%BD%D0%B0%D1%8F_%D0%B4%D0%BE%D0%BB%D1%8F" title="Миллионная доля – Russian" lang="ru" hreflang="ru" data-title="Миллионная доля" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Parts_per_million" title="Parts per million – Slovak" lang="sk" hreflang="sk" data-title="Parts per million" data-language-autonym="Slovenčina" data-language-local-name="Slovak" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/%C5%A0tevilo_delcev_na_milijon" title="Število delcev na milijon – Slovenian" lang="sl" hreflang="sl" data-title="Število delcev na milijon" data-language-autonym="Slovenščina" data-language-local-name="Slovenian" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/Ppm" title="Ppm – Serbian" lang="sr" hreflang="sr" data-title="Ppm" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Ppm" title="Ppm – Serbo-Croatian" lang="sh" hreflang="sh" data-title="Ppm" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Serbo-Croatian" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Ppm" title="Ppm – Finnish" lang="fi" hreflang="fi" data-title="Ppm" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Parts_per_million" title="Parts per million – Swedish" lang="sv" hreflang="sv" data-title="Parts per million" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Ppm" title="Ppm – Turkish" lang="tr" hreflang="tr" data-title="Ppm" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9C%D1%96%D0%BB%D1%8C%D0%B9%D0%BE%D0%BD%D0%BD%D0%B0_%D1%87%D0%B0%D1%81%D1%82%D0%BA%D0%B0" title="Мільйонна частка – Ukrainian" lang="uk" hreflang="uk" data-title="Мільйонна частка" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi badge-Q70893996 mw-list-item" title=""><a href="https://vi.wikipedia.org/wiki/Ppm_(m%E1%BA%ADt_%C4%91%E1%BB%99)" title="Ppm (mật độ) – Vietnamese" lang="vi" hreflang="vi" data-title="Ppm (mật độ)" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamese" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E7%99%BE%E8%90%AC%E5%88%86%E6%AF%94" title="百萬分比 – Cantonese" lang="yue" hreflang="yue" data-title="百萬分比" data-language-autonym="粵語" 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Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><p><b>Parts per million</b> is a <a href="/wiki/Unit_of_measurement" title="Unit of measurement">unit</a> which expresses a small <a href="/wiki/Quantity" title="Quantity">amount</a> of dimensionless quantities. Proportionally, parts per million represents one thousandth of a <a href="/wiki/Litre" title="Litre">millilitre</a> of something per <a href="/wiki/Litre" title="Litre">litre</a> of <a href="/wiki/Water" title="Water">water</a>, or one <a href="/wiki/Gram" title="Gram">milligram</a> of something per <a href="/wiki/Kilogram" title="Kilogram">kilogram</a> of <a href="/wiki/Soil" title="Soil">soil</a>. Just as per cent means out of a hundred, so parts per million or ppm means out of a million. Usually describes the concentration of something in water or soil. One ppm is equivalent to 1 milli-litre of something per litre of water (ml/l) or 1 milli-gram of something per kilogram soil (mg/kg). </p> <div class="boilerplate metadata plainlinks" id="stub"><span typeof="mw:File"><a href="/wiki/File:Wiki_letter_w.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/6c/Wiki_letter_w.svg/30px-Wiki_letter_w.svg.png" decoding="async" width="30" height="30" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/6c/Wiki_letter_w.svg/45px-Wiki_letter_w.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/6c/Wiki_letter_w.svg/60px-Wiki_letter_w.svg.png 2x" data-file-width="44" data-file-height="44" /></a></span> <i>This <a href="/wiki/Wikipedia:Stub" title="Wikipedia:Stub">short article</a> can be made longer. 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