Substances Valid None Data Dictionary Vocabularies Eionet Data Dictionary Volume of wastewater Valid Data Dictionary Vocabularies Eionet Data Dictionary Substances Volume Valid Data Dictionary Vocabularies Eionet Data Dictionary Substances Biochemical oxygen demand (BOD) Valid Data Dictionary Vocabularies Eionet Data Dictionary Substances Chemical oxygen demand (COD) Valid Data Dictionary Vocabularies Eionet Data Dictionary Substances Suspended solids Valid Data Dictionary Vocabularies Eionet Data Dictionary Substances Nitrogen (N-tot) Valid Data Dictionary Vocabularies Eionet Data Dictionary Substances Phosphorus (P-tot) Valid Data Dictionary Vocabularies Eionet Data Dictionary Substances Population equivalent (p.e.) Valid Data Dictionary Vocabularies Eionet Data Dictionary Substances Cadmium (Cd) Valid Data Dictionary Vocabularies Eionet Data Dictionary Substances Chromium (Cr) Valid Data Dictionary Vocabularies Eionet Data Dictionary Substances Copper (Cu) Valid Data Dictionary Vocabularies Eionet Data Dictionary Substances Nickel (Ni) Valid Data Dictionary Vocabularies Eionet Data Dictionary Substances Lead (Pb) Valid Data Dictionary Vocabularies Eionet Data Dictionary Substances Zinc (Zn) Valid Data Dictionary Vocabularies Eionet Data Dictionary Substances Arsenic (As) Valid Data Dictionary Vocabularies Eionet Data Dictionary Substances