Passage Data · Cited limits by place

Cyanide limits and guidelines in Québec (CA-QC)

22 numeric limits and guidelines for cyanide held for Québec and the place above it, from 6 instruments, each cited to its instrument, edition, section or page and quoted text. The register was built from 247 instruments. Everything held for Québec

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Québec (CA-QC): 11 rows

ParameterValueUnitStatisticGovernsApplies whenCite
Cyanure (sels solubles en CN)50µg/m³ambient air · guidelineMELCCFP — Normes et critères québécois de qualité de l'atmosphère (version 11)
Cyanure (sels solubles en CN)0µg/m³ambient air · printed referenceMELCCFP — Normes et critères québécois de qualité de l'atmosphère (version 11)
Cyanure (sels solubles en CN)0.16µg/m³ambient air · guidelineMELCCFP — Normes et critères québécois de qualité de l'atmosphère (version 11)
Cyanure (sels solubles en CN)0µg/m³ambient air · printed referenceMELCCFP — Normes et critères québécois de qualité de l'atmosphère (version 11)
cyanures libres0,044mg/L CNsurface water · guidelinereceiving water: freshwater
à l'effluent, sans dilution		Critères de qualité de l'eau de surface (MELCCFP)
fiche S0138 (cyanures libres) — valeur aiguë finale à l'effluent (VAFe)
0,044 (U.S.EPA, 1985h; U.S.EPA, 2002)
cyanures libres0,002mg/L CNsurface water · guidelinereceiving water: marine
à l'effluent, sans dilution		Critères de qualité de l'eau de surface (MELCCFP)
fiche S0138 (cyanures libres) — valeur aiguë finale à l'effluent (VAFe)
0,002 (U.S.EPA, 1985h; U.S.EPA, 2002) Cette concentration s'applique aux eaux saumâtres et salées.
cyanures libres0,022mg/L CNsurface water · guidelinereceiving water: freshwaterCritères de qualité de l'eau de surface (MELCCFP)
fiche S0138 (cyanures libres) — critère de vie aquatique aigu (CVAA)
0,022 (NYSDEC, 1988; MDEQ, 2008; U.S.EPA, 2006a)
cyanures libres0,001mg/L CNsurface water · guidelinereceiving water: marineCritères de qualité de l'eau de surface (MELCCFP)
fiche S0138 (cyanures libres) — critère de vie aquatique aigu (CVAA)
0,001 (NYSDEC, 1991; U.S.EPA, 2006a) Cette concentration s'applique aux eaux saumâtres et salées.
cyanures libres0,005mg/L CNsurface water · guidelinereceiving water: freshwaterCritères de qualité de l'eau de surface (MELCCFP)
fiche S0138 (cyanures libres) — critère de vie aquatique chronique (CVAC)
0,005 (U.S.EPA, 1976b; CCMRE, 1987; CCME, 2002)
cyanures libres0,001mg/L CNsurface water · guidelinereceiving water: marineCritères de qualité de l'eau de surface (MELCCFP)
fiche S0138 (cyanures libres) — critère de vie aquatique chronique (CVAC)
0,001 (U.S.EPA, 2006a) Cette concentration s'applique aux eaux saumâtres et salées.
Cyanures0,20mg/Ldrinking water · limitRèglement sur la qualité de l'eau potable (chapitre Q-2, r. 40), Annexe 1
Annexe 1, 2. Paramètres concernant les substances inorganiques — Substances inorganiques Concentration maximale (mg/L)
Cyanures 0,20

Canada (CA): 11 rows

ParameterValueUnitStatisticGovernsApplies whenCite
Cyanide0.9mg/kgsoil · guidelineConcentration (mg/kg dry weight) AgriculturalCCME — Soil Quality Guidelines for the Protection of Environmental and Human Health (Summary Table,…
Cyanide0.9mg/kgsoil · guidelineConcentration (mg/kg dry weight) Residential/ parklandCCME — Soil Quality Guidelines for the Protection of Environmental and Human Health (Summary Table,…
Cyanide8mg/kgsoil · guidelineConcentration (mg/kg dry weight) CommercialCCME — Soil Quality Guidelines for the Protection of Environmental and Human Health (Summary Table,…
Cyanide8mg/kgsoil · guidelineConcentration (mg/kg dry weight) IndustrialCCME — Soil Quality Guidelines for the Protection of Environmental and Human Health (Summary Table,…
Cyanide5 (as free CN)µg/Lsurface water · guidelinereceiving water: freshwater
long-term exposure: CCME's long-term guideline		CCME Canadian Water Quality Guidelines for the Protection of Aquatic Life
Cyanide0.50 mg/Lmg/Lmonthly averageeffluent · limitcites: MDMER
route: direct
a metal mine (or, since June 1, 2018, a diamond mine) whose final discharge points deposit more than 50 m3 of effluent per day (s. 2(1))
a mine to which the Regulations apply for the first time on or after June 1, 2021, or a recognized closed mine that returns to commercial operation on or after that day (s. 4(1)(a)(i))		Metal and Diamond Mining Effluent Regulations (SOR/2002-222)
Schedule 4, Table 1 — Column 2: maximum authorized monthly mean concentration
2 Copper 0.10 mg/L 0.15 mg/L 0.20 mg/L 3 Cyanide 0.50 mg/L 0.75 mg/L 1.00 mg/L
Cyanide0.75 mg/Lmg/Lcomposite sampleeffluent · limitcites: MDMER
route: direct
a metal mine (or, since June 1, 2018, a diamond mine) whose final discharge points deposit more than 50 m3 of effluent per day (s. 2(1))
a mine to which the Regulations apply for the first time on or after June 1, 2021, or a recognized closed mine that returns to commercial operation on or after that day (s. 4(1)(a)(i))		Metal and Diamond Mining Effluent Regulations (SOR/2002-222)
Schedule 4, Table 1 — Column 3: maximum authorized concentration in a composite sample
2 Copper 0.10 mg/L 0.15 mg/L 0.20 mg/L 3 Cyanide 0.50 mg/L 0.75 mg/L 1.00 mg/L
Cyanide1.00 mg/Lmg/Linstantaneouseffluent · limitcites: MDMER
route: direct
a metal mine (or, since June 1, 2018, a diamond mine) whose final discharge points deposit more than 50 m3 of effluent per day (s. 2(1))
a mine to which the Regulations apply for the first time on or after June 1, 2021, or a recognized closed mine that returns to commercial operation on or after that day (s. 4(1)(a)(i))		Metal and Diamond Mining Effluent Regulations (SOR/2002-222)
Schedule 4, Table 1 — Column 4: maximum authorized concentration in a grab sample
2 Copper 0.10 mg/L 0.15 mg/L 0.20 mg/L 3 Cyanide 0.50 mg/L 0.75 mg/L 1.00 mg/L
Cyanide0.50 mg/Lmg/Lmonthly averageeffluent · limitcites: MDMER
route: direct
a metal mine (or, since June 1, 2018, a diamond mine) whose final discharge points deposit more than 50 m3 of effluent per day (s. 2(1))
any other mine (s. 4(1)(a)(ii))		Metal and Diamond Mining Effluent Regulations (SOR/2002-222)
Schedule 4, Table 2 — Column 2: maximum authorized monthly mean concentration
2 Copper 0.30 mg/L 0.45 mg/L 0.60 mg/L 3 Cyanide 0.50 mg/L 0.75 mg/L 1.00 mg/L
Cyanide0.75 mg/Lmg/Lcomposite sampleeffluent · limitcites: MDMER
route: direct
a metal mine (or, since June 1, 2018, a diamond mine) whose final discharge points deposit more than 50 m3 of effluent per day (s. 2(1))
any other mine (s. 4(1)(a)(ii))		Metal and Diamond Mining Effluent Regulations (SOR/2002-222)
Schedule 4, Table 2 — Column 3: maximum authorized concentration in a composite sample
2 Copper 0.30 mg/L 0.45 mg/L 0.60 mg/L 3 Cyanide 0.50 mg/L 0.75 mg/L 1.00 mg/L
Cyanide1.00 mg/Lmg/Linstantaneouseffluent · limitcites: MDMER
route: direct
a metal mine (or, since June 1, 2018, a diamond mine) whose final discharge points deposit more than 50 m3 of effluent per day (s. 2(1))
any other mine (s. 4(1)(a)(ii))		Metal and Diamond Mining Effluent Regulations (SOR/2002-222)
Schedule 4, Table 2 — Column 4: maximum authorized concentration in a grab sample
2 Copper 0.30 mg/L 0.45 mg/L 0.60 mg/L 3 Cyanide 0.50 mg/L 0.75 mg/L 1.00 mg/L

What was searched

Every instrument we hold for Québec (CA-QC) and the place above it, Canada (CA): 23 instruments, for every parameter name matching “cyanide”: cyanide, cyanide a, cyanide free, zinc cyanide, cyanide total, ethyl cyanide, copper cyanide, methyl cyanide, silver cyanide, sodium cyanide, calcium cyanide, copper i cyanide, and 14 more (in the JSON).

  1. Metal and Diamond Mining Effluent Regulations (SOR/2002-222) — Schedule 4, maximum authorized concentrations · Government of Canada (Fisheries Act; Environment and Climate Change Canada) · Justice Laws Website, current to 2026-09-21 · source sha256 2c6e0151d3776378f73df4868ca98052882ee81faf9738bbeba6f5d544b648fe — 6 rows here
  2. Critères de qualité de l'eau de surface (MELCCFP) — vie aquatique : VAFe, CVAA et CVAC, eau douce et eau salée, toutes les fiches · Ministère de l'Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs (MELCCFP) · répertoire en ligne du MELCCFP, chaque fiche telle que servie le 2026-10-09 (each row names its fiche, its URL and its sha256) · source sha256 8808aa0b6ab877cc6c07ac7b3eed26ad6967cf19ea161430cd515d9c92e4bd75 — 6 rows here
  3. CCME — Soil Quality Guidelines for the Protection of Environmental and Human Health (Summary Table, as served 2026-09-24) · Canadian Council of Ministers of the Environment (CCME) · Summary Table · source sha256 f484a5f2a2dfcb5a4257763c853fc8dc810788cec54c75355b30ec194e2f7499 — 4 rows here
  4. MELCCFP — Normes et critères québécois de qualité de l'atmosphère (version 11) · Version 11 · source — 4 rows here
  5. CCME Canadian Water Quality Guidelines for the Protection of Aquatic Life — freshwater and marine, short and long term · Canadian Council of Ministers of the Environment (CCME) · Summary Table (as served 2026-09-24; each guideline carries its own year) · source sha256 f484a5f2a2dfcb5a4257763c853fc8dc810788cec54c75355b30ec194e2f7499 — 1 row here
  6. Règlement sur la qualité de l'eau potable (chapitre Q-2, r. 40), Annexe 1 — normes de qualité de l'eau potable: substances inorganiques, organiques et radioactives · Gouvernement du Québec (Loi sur la qualité de l'environnement, chapitre Q-2) · À jour au 1er mai 2026 · source sha256 b068f0bb04185246f572828cc43edce2fa774edd1adb4a04deb175cc235a9a9e — 1 row here
17 instruments searched with no row for it
  1. Canadian Ambient Air Quality Standards (CAAQS), environmental quality objectives under CEPA 1999 ss. 54(1) and 55(1): Objectives for Ambient PM2.5 and Ozone, Annex paras 1-4 and footnotes 1-2, Canada Gazette Part I, Vol. 147, No. 21, May 25, 2013 · Canada Gazette, Part I, Volume 147, Number 21: GOVERNMENT NOTICES May 25, 2013 · source — no row here
  2. Fisheries Act (R.S.C. 1985, c. F-14), s. 36(3) — no deposit of a deleterious substance in water frequented by fish; no value printed · Government of Canada (Fisheries Act; Environment and Climate Change Canada administers s. 36) · Justice Laws Website, current to 2026-09-21, last amended 2024-11-27 · source sha256 db95b0a149728b0f0b1e1b1314d87ecdf46a91e1edfec4a7006fc3cbe0080bd6 — no row here
  3. Health Canada, Objective for Canadian drinking water quality — per- and polyfluoroalkyl substances (published 2024-08-09) · Health Canada · Objective value · source sha256 32a42a0d382cdd90729dd9750f47889782bd00d4af8dfd34f2b9aaf6f2678c6c — no row here
  4. Meat and Poultry Products Plant Liquid Effluent Regulations (C.R.C., c. 818) — Schedule I authorized deposits · Government of Canada (Fisheries Act; Environment and Climate Change Canada) · Justice Laws Website, current to 2026-09-21 · source sha256 c60e2a2dfa9a10c2ddd314b391bf66215ad599732f38b4c5a15fe793d8c28841 — no row here
  5. Potato Processing Plant Liquid Effluent Regulations (C.R.C., c. 829) — Schedule I authorized deposits · Government of Canada (Fisheries Act; Environment and Climate Change Canada) · Justice Laws Website, current to 2026-09-21 · source sha256 691ca3953a6dd6ae66b4c72737944caa68ed76710447df642a16716dd25027a3 — no row here
  6. Pulp and Paper Effluent Regulations (SOR/92-269) — s. 14 maximum BOD and suspended solids · Government of Canada (Fisheries Act; Environment and Climate Change Canada) · Justice Laws Website, current to 2026-09-21 · source sha256 cc8432e6a4dd1834ff4dd43d5b5fb98f09b1f7af7952e36154febcc649504eb4 — no row here
  7. Petroleum Refinery Liquid Effluent Regulations (C.R.C., c. 828) — Schedule I authorized deposits · Government of Canada (Fisheries Act; Environment and Climate Change Canada) · Justice Laws Website, current to 2026-09-21 · source sha256 30e528bdc3a3546afb3defff4dae9b1dacb362e192680e127bd788d7f97c8ce8 — no row here
  8. Critères de qualité de l'eau de surface — Chlorures (S0118) · MELCCFP, critères de qualité de l'eau de surface (fetched 2026-09-25) · source sha256 cc9f05c98cd60864044dc20259964da0017ac28d2ea3b2ad983d21d186a7507c — no row here
  9. Critères de qualité de l'eau de surface — Fluorures, annexe 19 (valeurs selon la dureté) · MELCCFP, critères de qualité de l'eau de surface, annexe 19 (fetched 2026-09-25) · source sha256 23c2576d19cf4fa3ef19b76e92cd0eb024b0afe6a44f37f275277894cad43d48 — no row here
  10. Critères de qualité de l'eau de surface — Sulfates (S0424) · MELCCFP, critères de qualité de l'eau de surface (fetched 2026-09-25) · source sha256 afda6eb0e6dece76f720844fa93ee68e62b1c58569991e458081dca7b2a0b589 — no row here
  11. Directive 019 sur l'industrie minière (février 2025) — tableau 3.1, exigences au point de rejet de l'effluent final · Ministère de l'Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs (MELCCFP) · février 2025 · source sha256 3e46363df79aa14b684f360dc9b7f6172537079907e7bee50d0555abcbebe743 — no row here
  12. Guide d'intervention — Annexe 7 : Grille des critères de qualité des eaux souterraines · Ministère de l'Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs (MELCCFP) · mai 2021 · source sha256 524eb58a8fbb45fb67a028b495f8c546614d9afe041986e4b4fe302ea6700761 — no row here
  13. Calcul et interprétation des objectifs environnementaux de rejet (OER) — méthode · MELCCFP 2022 (PDF, fetched 2026-09-25) · source sha256 6554c84e7205021b00613201785fb1c6f4e03f4ab7823dffc905deb8413d144e — no row here
  14. Règlement sur les fabriques de pâtes et papiers (RLRQ, c. Q-2, r. 27) — normes sur les effluents (a. 10-45), aires de stockage (a. 53) et eaux de lixiviation (a. 104) · Gouvernement du Québec (Éditeur officiel du Québec) · LégisQuébec, à jour au 1er juin 2026 · source sha256 1516758981ed96c4cfff4f4b649cf154e20c298b1861bcc0633f6f2e49693677 — no row here
  15. Règlement sur les ouvrages municipaux d'assainissement des eaux usées (RLRQ, c. Q-2, r. 34.1) — a. 6 normes de rejet · Gouvernement du Québec (Éditeur officiel du Québec) · LégisQuébec, à jour au 1er juin 2026 · source sha256 cb2f552594d35b608b8af53e3dee9620e5b09ee80cfd8bccdd393a4bcf37cd9a — no row here
  16. Guide d'intervention — Annexe 2 : Grille des critères génériques pour les sols · Ministère de l'Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs (MELCCFP) · the register's own · source sha256 40961710c7d5f0b3e2c9f5d367595e0084ffa779f0d89dce765484b635422bab — no row here
  17. Wastewater Systems Effluent Regulations (SOR/2012-139) — s. 6 effluent quality · Government of Canada (Fisheries Act; Environment and Climate Change Canada) · Justice Laws Website, current to 2026-09-21, last amended 2026-06-04 · source sha256 0a60e10f783f7aca672792303dffcca1525133eb34eb32711543cb3cf4bbb955 — no row here

Read from public law and public agency files. A row missing here is missing from our sources, not from the law of the place. Check the cited source before relying on a value.