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      <marc:subfield code="a">Canadian environmental sustainability indicators : </marc:subfield>
      <marc:subfield code="b">municipal wastewater treatment.</marc:subfield>
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      <marc:subfield code="a">Municipal wastewater treatment</marc:subfield>
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      <marc:subfield code="a">Gatineau QC : </marc:subfield>
      <marc:subfield code="b">Environment and Climate Change Canada = Environnement et changement climatique Canada, </marc:subfield>
      <marc:subfield code="c">August 2023.</marc:subfield>
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      <marc:subfield code="c">©2023</marc:subfield>
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      <marc:subfield code="a">Issued also in French under title: Indicateurs canadiens de durabilité de l'environnement : traitement des eaux usées municipales.</marc:subfield>
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      <marc:subfield code="a">"Project code: EC23015."</marc:subfield>
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      <marc:subfield code="a">Includes bibliographical references.</marc:subfield>
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      <marc:subfield code="a">"Every day, millions of cubic metres (m3) of wastewater are discharged from homes, businesses, institutions, and industries into city sewer systems. Municipal wastewater is one of the largest sources of pollution to surface water in Canada. Before being released to the environment, wastewater needs to be treated. A higher level of wastewater treatment leads to a cleaner effluent and a smaller impact on the environment. The indicators show the level of wastewater treatment provided to the Canadian population and present the proportion of wastewater systems meeting the effluent quality national standards"--Page 5.</marc:subfield>
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      <marc:subfield code="t">Indicateurs canadiens de durabilité de l'environnement : </marc:subfield>
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      <marc:subfield code="t">Canadian environmental sustainability indicators : </marc:subfield>
      <marc:subfield code="w">(CaOODSP)9.894545</marc:subfield>
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      <marc:subfield code="q">PDF</marc:subfield>
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      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2024/eccc/en4/En4-144-8-2023-eng.pdf</marc:subfield>
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      <marc:subfield code="u">https://www.canada.ca/en/environment-climate-change/services/environmental-indicators/municipal-wastewater-treatment.html</marc:subfield>
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