Environment Canada:
the literal translation would be "Umwelt Kanada", but the reference to the Environment Protection Act indicates that this is in fact the name of the "Behörde" or "Amt". I would think that "Ministerium" is not the appropriate term, as the context indicates some involvement on a hands-on, practical level, which is not usually the responsibility of a Ministerium.

Domestic Substances List:
The context suggests a potential for harm to human health /the environment arising from these substances.
"Haushaltsprodukte" is being used with this meaning.

See for example:
Webpage Sozialministerium Mecklenburg-Vorpommern, Gemeinsames Giftinformationszentrum: "Akute Vergiftungen mit Arzneimitteln, Haushaltsprodukten und Chemikalien sowie Giftwirkung von Pflanzen und Tieren."

Webpage Deutscher Schädlingsbekämpfer Verband:
"Wer ruft an? Name, Wohnort, Rufnummer
Wer hat sich vergiftet? Alter, Geschlecht, Gewicht
Wodurch erfolgte die Vergiftung? Medikament, Chemikalie, Lebensmittel, Haushaltsprodukt, Tier, Pflanze .. "