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Document ID ca-on-dwtc-2021-06-24 Title Drinking water threats and circumstances URL https://www.ontario.ca/page/tables-drinking-water-threats Jurisdiction /ca/on Subdomain(s) none Language Status completed Analyzed at 2026-05-12 04:18:37.405464+00:00 Relevance inventory_targeted_fetch

Q Qualitative Requirements (9)

Req ID Category Intent Legal Status Name Subdomain(s) Context Conditions Confidence
#R001monitoringhealthmandatoryMethyl naphthalene summation ruleotherFor all tables, the methyl naphthalene soil standard is applicable to both 1-methyl naphthalene and 2 –methyl naphthalene, with the provision that if both are detected the sum of the two concentrations cannot exceed the standard.If both 1-methyl naphthalene and 2-methyl naphthalene are detectedhigh
#R002administrativeoperationalmandatoryQP site condition verificationotherThe QP must ascertain that the site conditions are appropriate for use of the generic standards such that he/she can be comfortable with signing the certifications on the RSC.When using generic standards for Record of Site Condition (RSC) filinghigh
#R003monitoringhealthmandatoryMethyl mercury analysis triggerotherAnalysis for methyl mercury only applies when mercury (total) standard is exceededWhen mercury (total) standard is exceededhigh
#R004monitoringunknownguidanceAquatic protection value estimationaquatic lifeIn such cases, the QP may need to consider whether a site-specific estimate of hardness and pH resulting from mixing of groundwater and surface water is needed to estimate an appropriate aquatic protection value for this site.If there is a surface water body that could be affected and total hardness is < 70mg/L and/or pH is < 6.7high
#R005operationaloperationalmandatoryShallow soil table selectionotherTables 6 and 7 are to be used in situations where there is less than 2 m of overburden above bedrock.When there is less than 2 m of overburden above bedrockhigh
#R006operationaloperationalmandatoryWater body proximity table selectionotherTables 8 and 9 are to be used where all or part of a property lies within 30 m of a surface water body.When all or part of a property lies within 30 m of a surface water bodyhigh
#R007monitoringoperationalguidanceBoron parameter selectionotherThe HWS boron can be used by itself for all surface soils, as plants are the most sensitive receptor for boron. For subsurface soils the total boron standard can be used by itself, since plant protection for soils below the root zone is not a significant concern.Selection between Hot Water Soluble and Total Boron based on soil depthhigh
#R008operationaloperationalrecommendedQP assessment of interrelated factorsotherThe QP should consider these types of factors in assessing the appropriateness of the use of the generic standards.When evaluating the validity of generic site condition standardshigh
#R009reportingreportingguidanceBTEX subtraction optionotherF1 fraction does not include BTEX; however, the proponent has the choice as to whether or not to subtract BTEX from the analytical result.When measuring Petroleum Hydrocarbons F1high

P Quantitative Requirements (45)

Req ID Category Intent Legal Status Name Subdomain(s) Limit Type Limit Value Context Conditions Confidence
#R010chemicalhealthmandatoryLead (Residential/Parkland/Institutional/Industrial/Commercial/Community Property Use)otherMAC120 µg/gFull Depth Background Site Condition Standard for Soil (other than sediment)high
#R011chemicalhealthmandatoryArsenic (Agricultural or Other Property Use)agricultural water, otherMAC11 µg/gFull Depth Background Site Condition Standard for Soil (other than sediment)high
#R012chemicalhealthmandatoryBenzene (Ground Water)drinking water, otherMAC0.5 µg/LFull Depth Background Site Condition Standard for Ground WaterAll Types of Property Useshigh
#R013chemicalaestheticmandatoryChloride (Ground Water)otherMAC790000 µg/LFull Depth Background Site Condition Standard for Ground WaterAll Types of Property Useshigh
#R014chemicalhealthmandatoryAcenaphthene (Agricultural or Other Property Use - Coarse Soil)agricultural water, otherMAC7.9 µg/gFull Depth Generic Site Condition Standards in a Potable Ground Water ConditionCoarse textured soilhigh
#R015chemicalhealthmandatoryAcenaphthene (Agricultural or Other Property Use - Medium/Fine Soil)agricultural water, otherMAC29 µg/gFull Depth Generic Site Condition Standards in a Potable Ground Water ConditionMedium and fine textured soilshigh
#R016chemicalhealthmandatoryAnthracene (Agricultural or Other Property Use)agricultural water, otherMAC0.05 µg/gFull Depth Background Site Condition Standard for Soil (other than sediment)high
#R017chemicalhealthmandatoryAnthracene (Residential/Parkland/Institutional/Industrial/Commercial/Community Property Use)otherMAC0.16 µg/gFull Depth Background Site Condition Standard for Soil (other than sediment)high
#R018chemicalhealthmandatoryAnthracene (Ground Water)drinking water, otherMAC0.1 µg/LFull Depth Background Site Condition Standard for Ground WaterAll Types of Property Useshigh
#R019chemicalhealthmandatoryAnthracene (Sediment)aquatic lifeMAC0.22 µg/gFull Depth Background Site Condition Standard for SedimentAll Types of Property Useshigh
#R020chemicalhealthmandatoryArsenic (Sediment)aquatic lifeMAC6 µg/gFull Depth Background Site Condition Standard for SedimentAll Types of Property Useshigh
#R021chemicalhealthmandatoryBarium (Ground Water)drinking water, otherMAC610 µg/LFull Depth Background Site Condition Standard for Ground WaterAll Types of Property Useshigh
#R022chemicalhealthmandatoryBoron (total) (Agricultural or Other Property Use)agricultural waterMAC36 µg/gFor subsurface soils the total boron standard can be used by itself.Subsurface soilshigh
#R023chemicalhealthmandatoryCadmium (Sediment)aquatic lifeMAC0.6 µg/gFull Depth Background Site Condition Standard for SedimentAll Types of Property Useshigh
#R024chemicalhealthmandatoryAcenaphthylene (Non-potable ground water)otherMAC1.8 µg/LFull Depth Generic Site Condition Standards in a Non-Potable Ground Water ConditionAll Types of Property Usehigh
#R025chemicalhealthmandatoryArsenic (Non-potable ground water)otherMAC1900 µg/LFull Depth Generic Site Condition Standards in a Non-Potable Ground Water ConditionAll Types of Property Usehigh
#R026chemicalhealthmandatoryAcenaphthylene (Agricultural or Other Property Use)agricultural water, otherMAC0.093 µg/gFull Depth Background Site Condition Standard for Soil (other than sediment)high
#R027chemicalhealthmandatoryAcenaphthylene (Ground Water)otherMAC1 µg/LFull Depth Background Site Condition Standard for Ground WaterAll Types of Property Useshigh
#R028chemicalhealthmandatoryAcetone (Ground Water)otherMAC2700 µg/LFull Depth Background Site Condition Standard for Ground WaterAll Types of Property Useshigh
#R029chemicalhealthmandatoryAntimony (Agricultural or Other Property Use)agricultural water, otherMAC1 µg/gFull Depth Background Site Condition Standard for Soil (other than sediment)high
#R030chemicalhealthmandatoryAntimony (Ground Water)otherMAC1.5 µg/LFull Depth Background Site Condition Standard for Ground WaterAll Types of Property Useshigh
#R031chemicalhealthmandatoryArsenic (Ground Water)otherMAC13 µg/LFull Depth Background Site Condition Standard for Ground WaterAll Types of Property Useshigh
#R032chemicalhealthmandatoryBenzene (Agricultural or Other Property Use)agricultural water, otherMAC0.02 µg/gFull Depth Background Site Condition Standard for Soil (other than sediment)high
#R033chemicalhealthmandatoryBarium (Agricultural or Other Property Use)agricultural water, otherMAC210 µg/gFull Depth Background Site Condition Standard for Soil (other than sediment)high
#R034chemicalhealthmandatoryBoron (total) (Ground Water)otherMAC1700 µg/LFull Depth Background Site Condition Standard for Ground WaterAll Types of Property Useshigh
#R035chemicalhealthmandatoryArsenic (Potable Ground Water)drinking waterMAC25 µg/LFull Depth Generic Site Condition Standards in a Potable Ground Water ConditionAll Types of Property Usehigh
#R036physicaloperationalmandatorySodium Adsorption Ratio (Residential/Parkland/Institutional/Industrial/Commercial/Community)otherrequirement2.4 ratioFull Depth Background Site Condition Standard for SoilNon-agricultural property useshigh
#R037physicaloperationalmandatoryElectrical Conductivity (Agricultural or Other Property Use)agricultural waterrequirement0.47 mS/cmFull Depth Background Site Condition Standard for SoilAgricultural or other property usehigh
#R038chemicalaestheticmandatorySodium (Ground Water)otherrequirement490000 µg/LFull Depth Background Site Condition Standard for Ground WaterAll Types of Property Useshigh
#R039chemicalhealthmandatoryAcenaphthene (Ground Water - Shallow Soils)drinking waterMAC4.1 µg/LGeneric Site Condition Standards for Shallow Soils in a Potable Ground Water ConditionSituations where there is less than 2 m of overburden above bedrockhigh
#R040chemicalhealthmandatoryArsenic (Sediment - Near Water Body)aquatic lifeMAC6 µg/gGeneric Site Condition Standards for Use within 30 m of a Water BodyProperty lies within 30 m of a surface water bodyhigh
#R041chemicalhealthmandatoryBenzene (Ground Water - Near Water Body, Non-Potable)aquatic lifeMAC44 µg/LGeneric Site Condition Standards for Use within 30 m of a Water Body in a Non-Potable Groundwater ConditionProperty lies within 30 m of a surface water bodyhigh
#R042operationalhealthmandatoryDistance to water body thresholdaquatic liferequirement<= 30 mTables 8 and 9 are to be used where all or part of a property lies within this distance of a surface water body.Situations requiring site condition standards near water bodieshigh
#R043physicaloperationalmandatoryOverburden thickness thresholdotherrequirement< 2 mTables 6 and 7 are to be used in situations where there is less than this amount of overburden above bedrock.Shallow soil assessmenthigh
#R044chemicalhealthmandatoryChlordane (Agricultural or Other Property Use)agricultural water, otherMAC0.05 µg/gFull Depth Background Site Condition Standard for Soil (other than sediment)high
#R045chemicalhealthmandatoryChlordane (Residential/Parkland/Institutional/Industrial/Commercial/Community Property Use)otherMAC0.05 µg/gFull Depth Background Site Condition Standard for Soil (other than sediment)high
#R046chemicalhealthmandatoryChlordane (Ground Water)drinking water, otherMAC0.06 µg/LFull Depth Background Site Condition Standard for Ground WaterAll Types of Property Useshigh
#R047chemicalhealthmandatoryChlordane (Sediment)aquatic lifeMAC0.007 µg/gFull Depth Background Site Condition Standard for SedimentAll Types of Property Useshigh
#R048chemicalhealthmandatoryDDT (Agricultural or Other Property Use)agricultural water, otherMAC0.078 µg/gFull Depth Background Site Condition Standard for Soil (other than sediment)high
#R049chemicalhealthmandatoryDDT (Residential/Parkland/Institutional/Industrial/Commercial/Community Property Use)otherMAC1.4 µg/gFull Depth Background Site Condition Standard for Soil (other than sediment)high
#R050chemicalhealthmandatoryDDT (Ground Water)drinking water, otherMAC0.05 µg/LFull Depth Background Site Condition Standard for Ground WaterAll Types of Property Useshigh
#R051chemicalhealthmandatoryDDT (Sediment)aquatic lifeMAC0.007 µg/gFull Depth Background Site Condition Standard for SedimentAll Types of Property Useshigh
#R052chemicalhealthmandatoryLead (Agricultural or Other Property Use)agricultural water, otherMAC45 µg/gFull Depth Background Site Condition Standard for Soil (other than sediment)high
#R053chemicalhealthmandatoryLead (Ground Water)drinking water, otherMAC1.9 µg/LFull Depth Background Site Condition Standard for Ground WaterAll Types of Property Useshigh
#R054chemicalhealthmandatoryLead (Sediment)aquatic lifeMAC31 µg/gFull Depth Background Site Condition Standard for SedimentAll Types of Property Useshigh

D Definitions (51)

Req ID Category Name Context Confidence
#D001aquiculture facility“aquiculture facility’ means a facility that primarily engages in farm-raising cultured fishhigh
#D002BTEX“BTEX” means benzene, toluene, ethylbenzene and xylenehigh
#D003DNAPL“DNAPL” means dense non-aqueous phase liquidhigh
#D004discharge“discharge”, when used as a verb, includes add, deposit, leak or emit and when used as a noun, includes addition, deposit, emission or leakhigh
#D005grade“grade” means the average level of the soil surface in the area surrounding the facility or structurehigh
#D006livestock density map“livestock density map” means a map contained in the most recent assessment report for the applicable source protection area and prepared in accordance with sub-rule 16 (10)high
#D007managed land map“managed land map” means a map contained in the most recent assessment report for the applicable source protection area and prepared in accordance with sub-rule 16 (9) of the Technical Ruleshigh
#D008managed land percentage“managed land percentage” means the percentage of managed land for the area as set out on the managed land maphigh
#D009meat plant“meat plant” has the same meaning as in section 1 of O. Reg. 31/05 (Meat) made under the Food Safety Quality Act, 2001high
#D010National airport“National airport” means an airport that serves the national capital region or the Greater Toronto Area, or an airport with annual passenger traffic of 200,000 persons or morehigh
#D011non-agricultural managed land“non-agricultural managed land” means managed land that is not agricultural managed lands including lawns, sport fields and golf courseshigh
#D012NPRI Notice“NPRI Notice” means the notice published in Volume 142, No. 7 of the Canada Gazette date February 16, 2008 pursuant to subsection 46(1) of the Canadian Environmental Protection Act, 1999 (Canada)high
#D013pathogen“pathogen” means a microscopic organism capable of producing infection or infectious disease in humanshigh
#D014PCB waste“PCB waste” has the same meaning as in regulations 362 (Waste Management – PCBs), R.R.O. 1990, made under the Environmental Protection Acthigh
#D015regional airport“regional airport” means an airport with an annual passenger traffic that is less than 200,000 persons and that is not a remote airport or a small airporthigh
#D016remote airport“remote airport” means an airport that serves a community where air transportation is the only reliable method of year round transportation between the community and other population centreshigh
#D017sanitary sewage“sanitary sewage” means sewage within or from a sanitary sewerhigh
#D018small airport“small airport” means an airport that does not have regular scheduled service to other airports and is not a remote airporthigh
#D019spill“spill” has the same meaning as in subsection 91 (1) of the Environmental Protection acthigh
#D020system“system” includes part of a systemmedium
#D021Technical Rules“Technical Rules” means the Ministry of the Environment and Climate Change document titled “Technical Rules: Assessment Report” as amended from time to time, and made under section 107 of the Clean Water Act, 2006high
#D022total impervious surface area map“total impervious surface area map” means a map contained in the most recent assessment report for the applicable source protection area and prepared in accordance with sub-rule 16 (11)high
#D023hauled sewagehas the same meaning as in Regulation 347 (General – Waste Management), R.R.O. 1990, made under the Environmental Protection Act: “hauled sewage”, where the phrase is used in relation to the application of hauled sewage to landhigh
#D024hazardous wastehas the same meaning as in Regulation 347 (General – Waste Management), R.R.O. 1990, made under the Environmental Protection Act: “hazardous waste”high
#D025liquid industrial wastehas the same meaning as in Regulation 347 (General – Waste Management), R.R.O. 1990, made under the Environmental Protection Act: “liquid industrial waste”high
#D026municipal wastehas the same meaning as in Regulation 347 (General – Waste Management), R.R.O. 1990, made under the Environmental Protection Act: “municipal waste”high
#D027petroleum refining wastehas the same meaning as in Regulation 347 (General – Waste Management), R.R.O. 1990, made under the Environmental Protection Act: “petroleum refining waste”high
#D028combined sewerhas the same meaning as in section 1 of O. Reg. 528/98 (Approval Exemptions) made under the Ontario Water Resources Act: “combined sewer”high
#D029sanitary sewerhas the same meaning as in section 1 of O. Reg. 528/98 (Approval Exemptions) made under the Ontario Water Resources Act: “sanitary sewer”high
#D030storm water management facilityhas the same meaning as in section 1 of O. Reg. 528/98 (Approval Exemptions) made under the Ontario Water Resources Act: “storm water management facility”high
#D031wastewater collection facilityhas the same meaning as in section 1 of O. Reg. 129/04 (Licensing of Sewage Works Operators) made under the Ontario Water Resources Act: “wastewater collection facility”high
#D032wastewater treatment facilityhas the same meaning as in section 1 of O. Reg. 129/04 (Licensing of Sewage Works Operators) made under the Ontario Water Resources Act: “wastewater treatment facility”high
#D033earth pit privyhas the same meaning as in O. Reg. 350/06 (Building Code) made under the Building Code Act, 1992: “earth pit privy”high
#D034greywaterhas the same meaning as in O. Reg. 350/06 (Building Code) made under the Building Code Act, 1992: “greywater”high
#D035hauled sewagehas the same meaning as in O. Reg. 350/06 (Building Code) made under the Building Code Act, 1992: “hauled sewage”/ where the phrase is used in relation to a system requiring or using a holding tankhigh
#D036hauled sewage systemhas the same meaning as in O. Reg. 350/06 (Building Code) made under the Building Code Act, 1992: “hauled sewage system”high
#D037holding tankhas the same meaning as in O. Reg. 350/06 (Building Code) made under the Building Code Act, 1992: “holding tank”high
#D038leaching bedhas the same meaning as in O. Reg. 350/06 (Building Code) made under the Building Code Act, 1992: “leaching bed”high
#D039privy vaulthas the same meaning as in O. Reg. 350/06 (Building Code) made under the Building Code Act, 1992: “privy vault”high
#D040treatment unithas the same meaning as in O. Reg. 350/06 (Building Code) made under the Building Code Act, 1992: “treatment unit”high
#D041agricultural operationhas the same meaning as in section 2 of the Nutrient management Act, 2002: “agricultural operation”high
#D042farm animalhas the same meaning as in section 2 of the Nutrient management Act, 2002: “farm animal”high
#D043permanent nutrient storage facilityhas the same meaning as in section 1 of O. Reg. 267/03 (General) made under the Nutrient management Act, 2002: “permanent nutrient storage facility”high
#D044runoffhas the same meaning as in section 1 of O. Reg. 267/03 (General) made under the Nutrient management Act, 2002: “runoff”, where used in relation to agricultural source material, fertilizer or non-agricultural source materialhigh
#D045temporary field nutrient storage sitehas the same meaning as in section 1 of O. Reg. 267/03 (General) made under the Nutrient management Act, 2002: “temporary field nutrient storage site”high
#D046O. Reg.Ontario Regulationhigh
#D047R.R.O.Revised Regulation of Ontariohigh
#D048NPRINational Pollutant Report Inventoryhigh
#D049No.numberhigh
#D050PCBpolychlorinated biphenylhigh
#D051PCBspolychlorinated biphenylshigh