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Document ID ca-walefl-2026-03-09 Title Water Level and Flow URL https://wateroffice.ec.gc.ca/ Jurisdiction /ca Subdomain(s) none Language Status completed Analyzed at 2026-05-12 03:38:10.085046+00:00 Relevance inventory_targeted_fetch

Q Qualitative Requirements (0)

No qualitative requirements.

P Quantitative Requirements (0)

No quantitative requirements.

D Definitions (103)

Req ID Category Name Context Confidence
#D001CaSRCanadian Surface Reanalysishigh
#D002NLSnoxious liquid substanceshigh
#D003IBC CodeInternational Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulkhigh
#D004BCH CodeCode for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulkhigh
#D005Annex IIRegulations for the Control of Pollution by Noxious Liquid Substances in Bulkhigh
#D006Division 2Noxious Liquid Substances and Dangerous Chemicalshigh
#D007Pollution ConventionInternational Maritime Organization's Pollution Conventionhigh
#D008ActFisheries Acthigh
#D009actual depositthe aggregate quantity, measured in pounds per day, of a deleterious substance prescribed in paragraph 4(a), (b), (c), (d) or (e) that is contained in all liquid effluent and once-through cooling water and that is actually deposited in any one day by a refineryhigh
#D010ammonia nitrogenthe nitrogen in ammonia that results from the operation of a refinery, that is contained in liquid effluent or once-through cooling water from that refinery and that is determined to be present therein by the test method referred to in item 4 of the table to Schedule IVhigh
#D011authorized depositthe aggregate quantity, measured in pounds per day, of a deleterious substance prescribed in paragraph 4(a), (b), (c), (d) or (e) that is contained in all liquid effluent and once-through cooling water and that may be deposited in any one day by a refinery under the authority of these Regulationshigh
#D012ballast waterwater, carried in a vessel for stability and seaworthiness, that is discharged from the vessel to a refinery prior to loading the vessel and includes water used for cargo or ballast tank cleaninghigh
#D013crude oilvirgin or naturally occurring unrefined petroleum and any hydrocarbons or mixture of hydrocarbons similar in composition to petroleum brought into a refinery for processing, but does not include hydrocarbons and residual fuels brought into a refinery primarily to meet the fuel requirements of that refinery or primarily for direct blending into finished productshigh
#D014daya period of 24 consecutive hourshigh
#D015depositto deposit or permit the deposit in water frequented by fishhigh
#D016liquid effluentsubject to subsection (3), waste water and includes process water, cooling tower blow-down, tank draining, ballast water, storm water, wastes from water treatment facilities and run-off from land used for the disposition of waste water and sludges associated with the operation of a refineryhigh
#D017Ministerthe Minister of the Environmenthigh
#D018oil and greasethe oil and grease that results from the operation of a refinery, that is contained in liquid effluent or once-through cooling water from that refinery and that is determined to be present therein by the test method referred to in item 1 of the table to Schedule IVhigh
#D019once-through cooling watersubject to subsection (3), water that has been circulated once through heat exchangers, either singly or in series, for the purpose of removing heat from process streams and that is not intended to come into contact with the process streamshigh
#D020ownerthe owner or operator of a refinery or his authorized representativehigh
#D021phenolsthe hydroxy derivatives of benzene and its condensed nuclei that result from the operation of a refinery, that are contained in liquid effluent or once-through cooling water from that refinery and that are determined to be present therein by the test method referred to in item 2 of the table to Schedule IVhigh
#D022process waterwater that is intended to come into contact with hydrocarbons or treating chemicals at a refineryhigh
#D023reference crude ratethe quantity of crude oil, expressed in thousand barrels per day, that, in accordance with section 6, has been declared by the owner of a refinery to be the reference crude rate of the refineryhigh
#D024refineryfacilities intended primarily for the separation and conversion of crude oil into products, including liquified petroleum gas, gasolines, naphthas, heating oils, fuel oils, asphalts, lubricating oils and greases, benzene, toluene, xylene, hydrogen, sulphur and coke, and includes blending, shipping and packaging facilities located on the refinery property and all properties developed for the operation of those facilities, but does not include facilities associated with the processing of natural gas or the production of synthetic petroleum originating from coal or bituminous sandshigh
#D025storm watersubject to subsection (2), water run-off that results from precipitation of any kind that falls on a refinery and includes water run-off originating from outside the refinery that passes over or through the refineryhigh
#D026stream day crude ratethe rate, in barrels per day, at which crude oil is processed in a refineryhigh
#D027sulfidedissolved sulfide that results from the operation of a refinery that is contained in liquid effluent or once-through water from that refinery and that is determined to be present therein by the test method referred to in item 3 of the table to Schedule IVhigh
#D028total suspended matterthe non-filterable residue that results from the operation of a refinery, that is contained in liquid effluent or once-through cooling water from that refinery and that is determined to be present therein by the test method referred to in item 5 of the table to Schedule IVhigh
#D029reference crude ratethe maximum design stream day crude rate of the refinery, divided by 1,000.high
#D030revised reference crude ratethe arithmetic mean of stream day crude rates sustained in commercial operation for at least seven consecutive days, divided by 1,000.high
#D031revised reference crude ratethe arithmetic mean of stream day crude rates sustained in commercial operation for at least 14 consecutive days, divided by 1,000.high
#D032ActAct means the Fisheries Act. (Loi)high
#D033acutely lethalacutely lethal, in relation to effluent, means that the effluent at 100% concentration kills, during a 96-hour period, more than 50% of the rainbow trout subjected to it. (létalité aiguë)high
#D034authorization officerauthorization officer, in respect of a province set out in column 1 of Schedule 1 and for each type of owner set out in column 2 of a wastewater system located in the province, means the holder of the position set out in column 3. (agent d’autorisation)high
#D035authorized representativeauthorized representative means (a) in respect of an owner or operator who is an individual, that individual or another individual or an entity that is authorized to act on their behalf; (b) in respect of an owner or operator that is a corporation, an employee of the corporation, or another individual or an entity that is authorized to act on behalf of the corporation; and (c) in respect of an owner or operator that is an entity other than a corporation, an individual or entity that is authorized to act on its behalf. (représentant autorisé)high
#D036blackwaterblackwater means used water from sanitary appliances that contains human fecal matter or human urine. (eaux-vannes)high
#D037bypassbypass, in relation to wastewater, means (a) the diversion of wastewater to an overflow point; or (b) the circumvention or the removal of one or more treatment steps normally applied to the wastewater before it is deposited as effluent, in any water or place referred to in subsection 36(3) of the Act, via a final discharge point. (dérivation)high
#D038carbonaceous biochemical oxygen demanding mattercarbonaceous biochemical oxygen demanding matter or CBOD matter means carbonaceous matter that consumes, by biochemical oxidation, oxygen dissolved in water. (matières exerçant une demande biochimique en oxygène de la partie carbonée ou matière exerçant une DBOC)high
#D039CBOD mattercarbonaceous biochemical oxygen demanding matter or CBOD matter means carbonaceous matter that consumes, by biochemical oxidation, oxygen dissolved in water. (matières exerçant une demande biochimique en oxygène de la partie carbonée ou matière exerçant une DBOC)high
#D040combined sewercombined sewer means a sewer that is designed to collect surface runoff and stormwater in such a manner that it mixes with wastewater referred to in any of paragraphs (a) to (c) of the definition wastewater or any combination of wastewater referred to in those paragraphs. (égout unitaire)high
#D041composite samplecomposite sample means (a) a composite sample as defined by the government of the province where the wastewater system is located, or under an Act of Parliament, if the definition applies to the wastewater system; (b) a quantity of effluent consisting of not less than three equal volumes or three volumes proportionate to the rate of flow that have been collected at approximately equal time intervals over (i) the period during which effluent is deposited, if effluent is deposited only during part of the day, or (ii) a sampling period of not less than seven hours and not more than 24 hours, if effluent is deposited throughout the day; or (c) a quantity of effluent collected continuously at a constant rate or at a rate proportionate to the rate of flow of the effluent over (i) the period during which effluent is deposited, if effluent is deposited only during part of the day, or (ii) a sampling period of not less than seven hours and not more than 24 hours, if effluent is deposited throughout the day. (échantillon composite)high
#D042effluenteffluent means wastewater that is deposited from a wastewater system. (effluent)high
#D043final discharge pointfinal discharge point means any point of a wastewater system, other than an overflow point, beyond which the owner or operator of the system no longer exercises control over the quality of the wastewater before it is deposited as effluent in water or a place. (point de rejet final)high
#D044greywatergreywater means used water, other than blackwater, from sanitary appliances or from other appliances in a kitchen or laundry. (eaux grises)high
#D045hydraulic retention timehydraulic retention time, in relation to a wastewater system, means the average period during which wastewater is retained for treatment and storage prior to release from that system. (temps de rétention hydraulique)high
#D046influentinfluent means wastewater entering a wastewater system. (affluent)high
#D047licensed professionallicensed professional means a licensed member of an engineering or scientific professional organization who has technical expertise in the field in question. (professionnel agréé)high
#D048overflow pointoverflow point means a point of a wastewater system via which excess wastewater may be deposited in water or a place and beyond which its owner or operator no longer exercises control over the quality of wastewater before it is deposited as effluent. (point de débordement)high
#D049point of entrypoint of entry, in relation to the final discharge point or an overflow point of a wastewater system, means (a) the point where effluent is deposited in water frequented by fish via the final discharge point or the overflow point, as the case may be; or (b) any point where the effluent enters that water from the place where it was deposited via the final discharge point or the overflow point, as the case may be. (point d’entrée)high
#D050previous calendar yearprevious calendar year, in respect of a given period and a wastewater system, means the most recent calendar year during which effluent was deposited via the system’s final discharge point that ended before the given period. (année civile précédente)high
#D051previous monthprevious month, in respect of a given period and a wastewater system, means the most recent month during which effluent was deposited via the system’s final discharge point that ended before the given period. (mois précédent)high
#D052previous quarterprevious quarter, in respect of a given period and a wastewater system, means the most recent quarter during which effluent was deposited via the system’s final discharge point that ended before the given period. (trimestre précédent)high
#D053Procedure for pH Stabilization EPS 1/RM/50Procedure for pH Stabilization EPS 1/RM/50 means the Procedure for pH Stabilization During the Testing of Acute Lethality of Wastewater Effluent to Rainbow Trout (EPS 1/RM/50), March 2008, published by the Department of the Environment, as amended from time to time. (Procédure de stabilisation du pH SPE 1/RM/50)high
#D054protected aquatic speciesprotected aquatic species means an aquatic species as defined in subsection 2(1) of the Species at Risk Act that is (a) a species at risk as defined in that subsection or a species that is listed in Schedule 1 to that Act; or (b) a species that is protected — or classified as an endangered species or threatened species as defined in that subsection — under the laws of a province. (espèce aquatique protégée)high
#D055quarterquarter, in respect of a year, means a period of three months that begins on the first day of January, April, July or October. (trimestre)high
#D056Reference Method EPS 1/RM/13Reference Method EPS 1/RM/13 means the Biological Test Method: Reference Method for Determining Acute Lethality of Effluents to Rainbow Trout (EPS 1/RM/13 Second Edition), December 2000 with May 2007 amendments, published by the Department of the Environment, as amended from time to time. (Méthode de Référence SPE 1/RM/13)high
#D057sanitary sewersanitary sewer means a sewer that is designed to collect wastewater referred to in any of paragraphs (a) to (c) of the definition wastewater or any combination of wastewater referred to in those paragraphs. (égout sanitaire)high
#D058suspended solidssuspended solids or SS means any solid matter contained in effluent that is retained on a filter that has a nominal pore size of 1.5 micrometres or smaller. (matières en suspension ou MES)high
#D059SSsuspended solids or SS means any solid matter contained in effluent that is retained on a filter that has a nominal pore size of 1.5 micrometres or smaller. (matières en suspension ou MES)high
#D060total residual chlorinetotal residual chlorine means the sum of free chlorine and combined chlorine, including inorganic chloramines. (chlore résiduel total)high
#D061wastewaterwastewater means (a) blackwater; (b) greywater that is mixed with blackwater; (c) used water — other than blackwater and greywater — from an industrial, commercial or institutional facility that is mixed with blackwater; or (d) surface runoff and stormwater that is mixed with blackwater. (eaux usées)high
#D062wastewater systemwastewater system means any work or undertaking, at least part of which is located on land, that is used for the collection and deposit of wastewater, whether or not the wastewater is treated, and includes a site that contains a wastewater lagoon. (système d’assainissement)high
#D063intermittent wastewater systemnamely, one with a hydraulic retention time of at least 90 days that deposits effluent via its final discharge point during at most four periods per calendar year, each of which is separated from every other period by at least seven clear days during which no deposit occurshigh
#D064continuous wastewater systemnamely, any wastewater system other than an intermittent wastewater system.high
#D065depositFor the purposes of sections 24 to 49, deposit, in relation to effluent, includes to permit the deposit of the effluent.high
#D066total ammoniathe concentration of total ammonia determined in accordance with subsection (2), expressed in mg/L as nitrogen (N)high
#D067pHthe pH of the effluent adjusted to 15°C ± 1°C and determined in accordance with subsection (3)high
#D068physical or biological treatmentFor the purposes of sections 43.2 and 43.3, physical or biological treatment means any treatment process, other than preliminary treatment, applied to wastewater for the purpose of removing suspended solids or CBOD matter, or both, from the influent.high
#D069precipitation eventFor the purposes of this section, precipitation event means an accumulation of precipitation, other than from melting snow or ice, that causes a temporary surcharge in the wastewater system because of a reduced capacity due to the construction work, the maintenance of the system or the response referred to in paragraph 43(2)(a) and results in a deposit of untreated wastewater mixed with surface runoff and stormwater.high
#D070bulk flow ratiobulk flow ratio means the ratio of the average rate of flow of a watercourse during a year to the average rate of flow of effluent that is deposited in that watercourse during that year. (coefficient de débit brut)high
#D071marine port watersmarine port waters means well-flushed marine waters, such as a sea port or harbour. (eaux d’un port maritime)high
#D072open marine watersopen marine waters, in relation to a final discharge point, means salt waters in an area defined by an arc of 135° extending 20 km from the point of entry in relation to the final discharge point, if there is no land within that area. (eaux libres en milieu marin)high
#D073pKapKa is 0.09018 + 2729.92/T, where T is the ambient water temperature in kelvinhigh
#D074ActAct means the Fisheries Act. (Loi)high
#D075acutely lethalacutely lethal, in respect of an effluent, means that the effluent at 100% concentration kills (a) more than 50% of the rainbow trout subjected to it for a period of 96 hours, when tested in accordance with the acute lethality test set out in section 14.1; (b) more than 50% of the threespine stickleback subjected to it for a period of 96 hours, when tested in accordance with the acute lethality test set out in section 14.2; (c) more than 50% of the Daphnia magna subjected to it for a period of 48 hours, when tested in accordance with the acute lethality test set out in section 14.3; or (d) more than 50% of the Acartia tonsa subjected to it for a period of 48 hours, when tested in accordance with the acute lethality test set out in section 14.4. (létalité aiguë)high
#D076commercial operationcommercial operation, in respect of a mine, means an average rate of production equal to or greater than 10% of the design-rated capacity of the mine over a period of 90 consecutive days. (exploitation commerciale)high
#D077composite samplecomposite sample means (a) a quantity of effluent consisting of not less than three equal volumes or three volumes proportionate to flow that have been collected at approximately equal time intervals over a sampling period of not less than seven hours and not more than 24 hours; or (b) a quantity of effluent collected continuously at a constant rate or at a rate proportionate to the rate of flow of the effluent over a sampling period of not less than seven hours and not more than 24 hours. (échantillon composite)high
#D078diamond minediamond mine means any work or undertaking that is designed or is used, or has been used, in connection with a mining or milling activity to produce a diamond or an ore from which a diamond may be produced. It includes any cleared or disturbed area that is adjacent to such a work or undertaking. (mine de diamants)high
#D079effluenteffluent means any of the following: (a) hydrometallurgical facility effluent, milling facility effluent, mine water effluent, tailings impoundment area effluent, treatment pond effluent or treatment facility effluent other than effluent from a sewage treatment facility; or (b) any seepage or surface runoff containing any deleterious substance that flows over, through or out of the site of a mine. (effluent)high
#D080final discharge pointfinal discharge point, in respect of an effluent, means an identifiable discharge point of a mine beyond which the operator of the mine no longer exercises control over the quality of the effluent. (point de rejet final)high
#D081hydrometallurgical facility effluenthydrometallurgical facility effluent means effluent from the acidic leaching, solution concentration and recovery of metals by means of aqueous chemical methods, tailings slurries, and all other effluents deposited from a hydrometallurgical facility. (effluent d’installations d’hydrométallurgie)high
#D082hydrometallurgyhydrometallurgy means the production of a metal by means of aqueous chemical methods for acidic leaching, solution concentration and recovery of metals from metal-bearing minerals other than metal-bearing minerals that have been thermally pre-treated or blended with metal-bearing minerals that have been thermally pre-treated. (hydrométallurgie)high
#D083metal minemetal mine means any work or undertaking that is designed or is used, or has been used, in connection with a mining, milling or hydrometallurgical activity to produce a metal or a metal concentrate or an ore from which a metal or a metal concentrate may be produced, as well as any cleared or disturbed area that is adjacent to such a work or undertaking. It includes any work or undertaking, such as a smelter, pelletizing plant, sintering plant, refinery or acid plant, if its effluent is combined with the effluent from a mining, milling or hydrometallurgical activity whose purpose is to produce a metal or a metal concentrate or an ore from which a metal or a metal concentrate may be produced. (mine de métaux)high
#D084millingmilling means any of the following activities for the purpose of producing a diamond, metal or metal concentrate: (a) the crushing or grinding of ore or kimberlite; (b) the processing of uranium ore or uranium enriched solution; or (c) the processing of tailings. (préparation du minerai)high
#D085milling facility effluentmilling facility effluent means tailing slurries, heap leaching effluent, solution mining effluent and all other effluent deposited from a milling facility. (effluent d’installations de préparation du minerai)high
#D086mine water effluentmine water effluent means, in respect of mining activities, water that is pumped from or flows out of any underground works, solution chambers or open pits. (effluent d’eau de mine)high
#D087monthly mean concentrationmonthly mean concentration means the average value of the concentrations measured in all composite or grab samples collected from each final discharge point during each month when a deleterious substance is deposited. (concentration moyenne mensuelle)high
#D088operatoroperator means any person who operates, has control or custody of or is in charge of a mine. (exploitant)high
#D089placer miningplacer mining means a mining operation that extracts minerals or metals from stream sediments by gravity or magnetic separation. (exploitation des placers)high
#D090Reference Method EPS 1/RM/10Reference Method EPS 1/RM/10 means Biological Test Method: Reference Method for Determining Acute Lethality Using Threespine Stickleback, published in December 2017 by the Department of the Environment, as amended from time to time. (méthode de référence SPE 1/RM/10)high
#D091Reference Method EPS 1/RM/13Reference Method EPS 1/RM/13 means Biological Test Method: Reference Method for Determining Acute Lethality of Effluents to Rainbow Trout (Reference Method EPS 1/RM/13), July 1990, published by the Department of the Environment, as amended in December 2000, and as may be further amended from time to time. (méthode de référence SPE 1/RM/13)high
#D092Reference Method EPS 1/RM/14Reference Method EPS 1/RM/14 means Biological Test Method: Reference Method for Determining Acute Lethality of Effluents to Daphnia magna (Reference Method EPS 1/RM/14), July 1990, published by the Department of the Environment, as amended in December 2000, and as may be further amended from time to time. (méthode de référence SPE 1/RM/14)high
#D093Reference Method STB 1/RM/60Reference Method STB 1/RM/60 means Biological Test Method: Reference Method for Determining Acute Lethality Using Acartia tonsa, published in June 2019 by the Department of the Environment, as amended from time to time. (méthode de référence DGST 1/RM/60)high
#D094suspended solidssuspended solids means any solid matter contained in an effluent that is retained on a 1.5 micron pore filter paper when the effluent is tested in compliance with the analytical requirements set out in Table 1 of Schedule 3. (matières en suspension)high
#D095treatment facility effluenttreatment facility effluent means water from a polishing pond, treatment pond, settling pond or water treatment plant or from any mine effluent treatment facility. (effluent d’installations de traitement)high
#D096biological monitoring studybiological monitoring study means a study referred to in section 9. (étude de suivi biologique)high
#D097effect on fish tissue from mercuryeffect on fish tissue from mercury means a concentration of total mercury that exceeds 0.5 μg/g wet weight in fish tissue that is taken in an exposure area and that is statistically different from and higher than the concentration of total mercury in fish tissue that is taken in a reference area. (effet du mercure sur les tissus de poissons)high
#D098effect on the benthic invertebrate communityeffect on the benthic invertebrate community means a statistical difference between data referred to in subparagraph 12(1)(e)(ii) and paragraph 12(1)(f) from a study respecting the benthic invertebrate community conducted in (a) an exposure area and a reference area; or (b) sampling areas within an exposure area where there are gradually decreasing effluent concentrations. (effet sur la communauté d’invertébrés benthiques)high
#D099effect on the fish populationeffect on the fish population means a statistical difference between data relating to the indicators referred to in subparagraph 12(1)(e)(i) from a study respecting fish population conducted in (a) an exposure area and a reference area; or (b) sampling areas within an exposure area where there are gradually decreasing effluent concentrations. (effet sur la population de poissons)high
#D100exposure areaexposure area means all fish habitat and waters frequented by fish that are exposed to effluent. (zone exposée)high
#D101fishfish has the same meaning as in section 2 of the Act but does not include parts of fish, parts of shellfish, parts of crustaceans or parts of marine animals. (poisson)high
#D102reference areareference area means water frequented by fish that is not exposed to effluent and that has fish habitat that, as far as practicable, is most similar to that of the exposure area. (zone de référence)high
#D103sampling areasampling area means the area within an exposure or reference area where representative samples are collected. (zone d’échantillonnage)high