Parameter Viewer

Document ID ca-bc-lwqg-1987 Title Lead Water Quality Guidelines - Marine, Wildlife, Livestock, and Irrigation URL https://www2.gov.bc.ca/assets/gov/environment/air-land-water/water/waterquality/water-quality-guidelines/approved-wqgs/lead/lead_water_quality_guidelines_marine_agriculture_wildlife_1987-reformatted.pdf Jurisdiction /ca/bc Subdomain(s) Agricultural water, Wastewater Language en Status completed Analyzed at 2026-03-15 05:56:02.812652+00:00 Relevance Sets numeric lead limits for irrigation, livestock, and marine water uses.
7 Qualitative 7 Quantitative 47 Definitions

Q Qualitative Requirements (7)

Req ID Category Intent Legal Status Name Subdomain(s) Context Conditions Confidence
#Q001corrective_actionunknownguidanceAdditional Investigation for ExceedancesotherAn exceedance of the WQGs presented in this document, however, does not imply that unacceptable risks are present, but that the potential for adverse effects is increased and additional investigation and monitoring may be warranted.When there is an exceedance of the Water Quality Guidelines (WQGs).high
#Q002monitoringoperationalrecommendedOngoing Ecological MonitoringotherTo that end, ongoing ecological monitoring is encouraged to ensure the WQG is indeed protective under field conditions.high
#Q003operationalhealthrecommendedLead Reduction in Oyster Growing Areasaquatic lifeSpecial efforts should be made to reduce lead levels even further in oyster growing areasApplicable in oyster growing areas (as cited from U.S. EPA 1972 criteria)medium
#Q004monitoringreportingrecommended30-Day Average Sampling Frequencyaquatic life(a) The average concentration of total lead in water over a 30-day period (based on a minimum of 5 weekly samples) should not exceed 2 µg/L at any time.When calculating the 30-day average concentration of total lead.high
#Q005administrativeoperationalrecommendedSite-Specific Allowance for High Natural Leadaquatic life(c) If natural levels exceed (a) or (b) above, then the increase in total lead to be allowed, if any, should be based on site-specific conditions.If natural levels exceed the recommended 30-day average or maximum criteria for total lead.high
#Q006monitoringoperationalrecommended30-Day Average Sampling Frequencyaquatic lifeThe average concentration of total lead in water over a 30-day period (based on a minimum of 5 weekly samples) should not exceed 2 µg/L at any time.When assessing compliance with the 30-day average guideline for marine aquatic life.high
#Q007monitoringoperationalrecommendedMarine Aquatic Life 30-Day Average and Sample Distributionaquatic lifeThe average concentration of total lead in water over a 30-day period (based on a minimum of 5 weekly samples) should not exceed 2 µg/L at any time. Not more than 20% (e.g., 1 in 5) of the values in a 30-day period should exceed 3 µg/L.Applicable when assessing compliance with marine aquatic life guidelines.high

P Quantitative Requirements (7)

Req ID Category Intent Legal Status Name Subdomain(s) Limit Type Limit Value Context Conditions Confidence
#P001chemicalhealthrecommendedLeadaquatic lifeMAC<= 2 µg/LMarine Aquatic LifeAverage concentration over a 30-day periodhigh
#P002chemicalhealthrecommendedLeadaquatic lifeMAC<= 3 µg/LMarine Aquatic LifeNot more than 20% (e.g., 1 in 5) of the values in a 30-day period should exceed this concentrationhigh
#P003chemicalhealthrecommendedLeadaquatic lifeMAC<= 140 µg/LMarine Aquatic LifeMaximum concentration at any timehigh
#P004chemicalhealthrecommendedLeadotherMAC<= 100 µg/LWildlife Water SupplyMaximum concentration at any timehigh
#P005chemicalhealthrecommendedLeadagricultural waterMAC<= 100 µg/LLivestock Water SupplyMaximum concentration at any timehigh
#P006chemicalhealthrecommendedLeadagricultural waterMAC<= 400 µg/LIrrigation Water SupplyNeutral and alkaline fine textured soils; maximum concentration at any timehigh
#P007chemicalhealthrecommendedLeadagricultural waterMAC<= 200 µg/LIrrigation Water SupplyContinuous use on all other soils; maximum concentration at any timehigh

D Definitions (47)

Req ID Category Name Context Confidence
#D001WQGa scientifically derived numerical concentration or narrative statement considered to be protective of designated values in ambient conditionshigh
#D002Pbleadhigh
#D003Ehoxidationreduction potentialhigh
#D004ALA-Dδ-aminolevulinic acid dehydratasehigh
#D005b.w.body weighthigh
#D006d.m.dry matterhigh
#D007CECcation exchange capacityhigh
#D008WLRSBritish Columbia Ministry of Water, Land, and Resource Stewardshiphigh
#D009EC5050% reduction in growth rate and maximum yield of the organismshigh
#D010δ-ALAδ-aminolevulinic acidhigh
#D011IWDInland Waters Directoratehigh
#D012criteriaambient water quality guidelineshigh
#D013B.C.British Columbiahigh
#D014chronic valuethe geometric mean of the lower and upper limitshigh
#D015PbSGalena or lead glancehigh
#D016mysidMysidopsis bahiahigh
#D017coontailCeratophyllum demersumhigh
#D018Interim WQGsWQGs developed when the available toxicological data are insufficienthigh
#D019no-effect concentrationan estimate where no effects are expected if exposure concentrations are below the WQGhigh
#D020CCMECanadian Council of Ministers of the Environmenthigh
#D021sheepshead minnowCyprinodon variegatushigh
#D022mummichogFundulus heteroclitushigh
#D023inland silversideMenidia beryllinahigh
#D024Atlantic silversideMenidia menidiahigh
#D025soft-shell clamMya arenariahigh
#D026blue musselMytilus edulishigh
#D027pacific oysterCrassostrea gigashigh
#D028eastern oysterCrassostrea virginicahigh
#D029quahog clamMercenaria mercenariahigh
#D030Dungeness crabCancer magisterhigh
#D031gadwallAnas streperahigh
#D032redheadAythya americanahigh
#D033canvas backAythya valisneriahigh
#D034ringnecked ducksAythya collarishigh
#D035suckersCatostomidaehigh
#D036tealAmus sp.high
#D037shovelerSpatula clypeatahigh
#D038CopepodAcartia claustihigh
#D039lesser scaupa species of duckhigh
#D040saltwater algaChampia parvulahigh
#D041saltwater algaDunaliella tertiolectahigh
#D042saltwater diatomDitylurn brightwellihigh
#D043saltwater diatomAstrionella japonicahigh
#D044ENVBritish Columbia Ministry of Environment and Climate Change Strategyhigh
#D045U.S. EPAU.S. Environmental Protection Agencyhigh
#D046CCREMCanadian Council of Resource and Environment Ministershigh
#D047mallardsAnarsplaty hyrchashigh