| Req ID | Category | Intent | Legal Status | Name | Subdomain(s) | Context | Conditions | Confidence |
|---|---|---|---|---|---|---|---|---|
| #Q001 | treatment | treatment | mandatory | Surface Water Dual Treatment Requirement | drinking water | Island Health requires all surface water supply systems to provide two types of treatment processes (VIHA, 2010). | Applies to surface water supply systems | high |
| #Q002 | administrative | unknown | recommended | Waterfront Development Guidelines Adherence | other | The OCP also indicates that developments on the waterfront should follow the Mill Bay Village Development Permit Area guidelines to protect Saanich Inlet (CVRD, 2011a). | Applies to developments on the waterfront | high |
| #Q003 | operational | operational | recommended | Riparian Area Protection | aquatic life | Therefore, efforts should be made to protect riparian areas to retain vegetative cover over streams and keep stream temperatures from increasing where land clearing from development occurs. | Where land clearing from development occurs | high |
| #Q004 | monitoring | operational | recommended | Summer Water Temperature Monitoring | aquatic life | In the future, water temperature should be measured in the tributaries throughout the summer months, prioritizing those with lower flows or less canopy cover and/or higher fisheries values, to determine if water temperature is a concern. | Throughout the summer months, prioritizing those with lower flows or less canopy cover and/or higher fisheries values | high |
| #Q005 | monitoring | operational | recommended | Dissolved Oxygen (DO) Monitoring | aquatic life | As there is potential for freshwater streams in the Mill Bay study area to experience very low flows, and since there are limited data for DO levels in the freshwater tributaries to Mil Bay, it is recommended to measure DO in future monitoring programs. | In future monitoring programs | high |
| #Q006 | monitoring | operational | recommended | Conductivity Collection for Tidal Assessment | other | Continued collection of conductivity is recommended to help interpret results and to rule out tidal influence at any freshwater sites. | At any freshwater sites | high |
| #Q007 | treatment | treatment | guidance | Raw Water Pre-Treatment for Turbidity | drinking water | An alternative to the average objective of 2 NTU would be to treat the raw water prior to chlorination to remove some of the turbidity and increase chlorine efficiency. | As an alternative to meeting the average objective of 2 NTU | high |
| #Q008 | monitoring | unknown | recommended | Nitrate Levels Assessment | aquatic life | However, because land uses occur that contribute to nutrient loading, there are high total phosphorus values observed (see next section), and to better understand nutrient dynamics in the Mill Bay study area, it would be prudent to assess nitrate levels in future monitoring of this area. | In future monitoring of the area | high |
| #Q009 | monitoring | unknown | recommended | Continued Total Phosphorus Monitoring | aquatic life | As maximum total phosphorus guidance values had the potential for exceedance (if levels observed during 5 in 30s were representative of the rest of the growing season) at almost all of the study sites, monitoring of total phosphorus should continue, including monthly May-September total phosphorus monitoring, with results compared to Vancouver Island Phosphorus Guidance values (BC ENV, 2014). | Monthly between May-September | high |
| #Q010 | monitoring | unknown | recommended | Chlorophyll a Monitoring | aquatic life, recreational water | However, given the observed total phosphorus levels and known land use activities in the study area, it is recommended that chlorophyll a monitoring be conducted in future sampling of freshwater tributaries. | In future sampling of freshwater tributaries | high |
| #Q011 | monitoring | health | recommended | Metals and Hardness Monitoring | aquatic life | However, to ensure that these were isolated incidents and do not reflect potential contamination, we recommended continued monitoring of metals and hardness in the tributaries to Mill Bay, with an emphasis on assessing arsenic, iron, manganese, copper and zinc levels, particularly on sites downstream of major roadways. | Particularly on sites downstream of major roadways | high |
| #Q012 | monitoring | operational | recommended | Chloride/Specific Conductance Analysis | other | It would be prudent to include chloride and or specific conductance analysis with every sample to confidently rule out marine influences at any sample locations. | With every sample | high |
| #Q013 | treatment | health | mandatory | Disinfection Prior to Consumption | drinking water | The presence of domestic water licenses on the tributaries to Mill Bay emphasizes the need for consideration of exceedances of drinking water guidelines and the need for disinfection prior to consumption, where applicable. | Where applicable (domestic water licenses) | high |
| #Q014 | monitoring | health | recommended | Microbiological Parameters Monitoring | drinking water, aquatic life, recreational water | For all these reasons, it is recommended that microbiological parameters continue to be monitored in the Mill Bay tributaries, and that results should be compared to the E. coli objective existing for Cowichan and Koksilah Rivers of ≤ 10 CFU/100 mL. | In the Mill Bay tributaries | high |
| #Q015 | administrative | unknown | recommended | Periodic Review of Objectives | other | These recommended objectives should be periodically reviewed and revised to reflect any future improvements or technological advancements in water quality assessment and analysis. | high | |
| #Q016 | monitoring | unknown | recommended | Future Attainment Monitoring Frequency | other | It is recommended that future attainment monitoring occur once every three to five years based on staff and funding availability, and whether activities, such as agriculture or development, change significantly within the study area. | Once every three to five years based on staff and funding availability and significant changes in activities | high |
| #Q017 | monitoring | operational | recommended | Summer and Fall Frequency Monitoring | aquatic life, drinking water, recreational water | Monitoring consisting of at least five samples collected within a 30-day period should be conducted during the summer dry period (between August and September) and the fall freshet period (October and November) at all sites (freshwater and marine). | During the summer dry period and the fall freshet period at all sites | high |
| #Q018 | monitoring | operational | recommended | Winter Sampling with Rain Events | aquatic life, drinking water, recreational water | Samples collected during the winter months should coincide with rain events whenever possible. | During the winter months | high |
| #Q019 | monitoring | operational | guidance | Spring Manure Spreading Monitoring | aquatic life | An additional 5 in 30 monitoring period during spring manure spreading (March/April) in the tributaries only may provide useful information on nutrient sources to the streams. | During spring manure spreading (March/April) in the tributaries only | high |
| #Q020 | monitoring | unknown | recommended | Analysis Parameters for Water Samples | aquatic life, drinking water, recreational water | These samples should be analyzed for total and dissolved metals and hardness, nutrients, conventional parameters, and E. coli. | For samples collected during monitoring periods | high |
| #Q021 | monitoring | operational | recommended | Growing Season Freshwater Field Sampling | aquatic life | Monthly field sampling should occur during the growing season at the freshwater sites to measure total phosphorous and chlorophyll a. | Monthly during the growing season at freshwater sites | high |
| #Q022 | monitoring | operational | recommended | Chlorophyll a Measurement Method | aquatic life | Chlorophyll a should be measured as the biomass of naturally growing periphytic algae, which will allow direct comparison to BC Water Quality Guidelines. | high | |
| #Q023 | monitoring | health | recommended | Marine Areas Microbiological Analysis | aquatic life, recreational water | The samples collected in the marine areas should be analyzed for microbiological parameters (enterococci and fecal coliforms). | Samples collected in the marine areas | high |
| #Q024 | monitoring | unknown | recommended | Sediment Sampling in Key Sites | aquatic life | It is recommended that some limited sediment sampling be included during future attainment monitoring sampling at key sites such as the 'Unnamed creek at Kilmalu Rd' site, Shawnigan Creek inflow and outflow sites, and key marine sites (e.g., 'EC site SA090' near the Mill Bay Nature Park, and 'EC site PA2' at the Mill Bay marina). | During future attainment monitoring sampling at key sites | high |
| #Q025 | monitoring | health | recommended | Microbial Source Tracking (MST) | aquatic life, drinking water, recreational water | It is recommended that microbial source tracking (MST) sampling occur during future attainment monitoring, to identify sources of microbiological contaminants. | During future attainment monitoring | high |
| #Q026 | operational | operational | mandatory | Mill Bay Waterworks District Responsibility | drinking water | There is a community water system, operated by the Mill Bay Waterworks District (MBWD), which is the largest purveyor of water services in the area and is responsible for ensuring that water quality meets the Canadian Drinking Water Guidelines. | Applies to the MBWD community water system | high |
| #Q027 | prohibition | health | mandatory | Vessel Sewage Disposal Responsibility | other | Vessels are responsible for disposing of their sewage in accordance with the Canada Shipping Act Regulations for the Prevention of Pollution from Ships and for Dangerous Chemicals. | Applies to vessels in Mill Bay marine waters | high |
| #Q028 | administrative | unknown | mandatory | Mining Impact Assessment Requirement | aquatic life | The likelihood of these sites being developed for mining activities is not known, but any activities would have to undergo impact assessments to ensure that water quality is not impacted. | Applies to any mining development activities in the watershed | high |
| #Q029 | administrative | aesthetic | mandatory | Waterfront Rezoning Public Access Condition | other | all applications for rezoning a parcel of land along the Mill Bay shoreline will be conditional on the provision of public access to the waterfront, to accommodate the construction of a public walkway along the shoreline | Applies to applications for rezoning land along the Mill Bay shoreline | high |
| #Q030 | monitoring | reporting | mandatory | QA/QC Duplicate Sample Acceptability | other | The maximum acceptable percentage difference between duplicate samples is 25% (RISC, 1997). | Only holds true if the results are at least 10 times the detection limits for a given parameter | high |
| #Q031 | monitoring | reporting | mandatory | Statistical Calculation Basis | drinking water, aquatic life, recreational water | All statistics are to be calculated based on five samples in 30 days. | Applies to the calculation of water quality objective compliance statistics | high |
| #Q032 | administrative | operational | mandatory | Groundwater Licensing Requirement | drinking water, agricultural water, other | Under the Water Sustainability Act a water license is required for groundwater use for any non-domestic purpose (e.g., irrigation, industrial use, waterworks, etc) | Applies to groundwater use for non-domestic purposes | high |
| #Q033 | monitoring | operational | guideline | Unfiltered Surface Water Performance Goal | drinking water | VIHA's goal for surface source drinking water quality for systems that do not receive filtration, such as domestic use licenses, is that they demonstrate 1 NTU turbidity or less (95% of days) and not above 5 NTU on more than 2 days in a 12 month period (min. four hour frequency of monitoring) when sampled immediately before disinfection (BC ENV, 2012; BC ENV, 2013; VIHA, 2010). | Applies to surface source drinking water systems that do not receive filtration | high |
| #Q034 | operational | treatment | mandatory | Treatment and Disinfection Determination Authority | drinking water | Island Health (previously called the Vancouver Island Health Authority; VIHA) determines the level of treatment and disinfection required based on both the source and end-of-tap water quality. | Applies to determining the required level of treatment/disinfection | high |
| #Q035 | operational | operational | guidance | Environmental Flow Endorsement | aquatic life | For waterways modified by flow control structures, the BC ENV endorses a 20% Mean Annual Discharge (MAD) to protect healthy fish habitat. | Applies to waterways modified by flow control structures | high |
| #Q036 | monitoring | operational | mandatory | Laboratory QA/QC Procedure Requirement | other | analytical laboratories prepared and analyzed a variety of Quality Assurance/Quality Control (QA/QC) samples (e.g., matrix spike, spiked blank, method blank) and all QC data were reviewed and validated prior to delivery to the BC ENV. | During sample analysis for the monitoring program | high |
| #Q037 | monitoring | operational | recommended | E. coli Indicator Recommendation | drinking water, aquatic life, recreational water | we recommend using E. coli as the microbiological indicator for freshwater in the Mill Bay study area. | For freshwater microbiological quality assessment | high |
| #Q038 | monitoring | operational | recommended | Water Quality Contaminant Source Investigation | drinking water, aquatic life, recreational water | Further investigation should occur to better identify specific sources of water quality contaminants. | high | |
| #Q039 | treatment | health | mandatory | Drinking Water Disinfection and Potability Requirements | drinking water | The BC Drinking Water Protection Act (BC Gov, 2001) (administered by the Ministry of Health and implemented by Regional Health Authorities) sets minimum disinfection requirements for all surface supplies as well as requiring drinking water to be potable. | Applies to all surface water supplies | high |
| #Q040 | treatment | treatment | mandatory | CVRD Water Treatment Step Upgrade | drinking water | Island Health continues to allow the Cowichan Valley Regional District (CVRD) to provide drinking water treated by disinfection (chlorination) only, with the understanding that the CVRD is working towards implementing a second step of treatment | Applies to Cowichan Valley Regional District (CVRD) water supply systems | high |
| #Q041 | prohibition | health | mandatory | Mill Bay Bivalve Shellfish Harvesting Closure | aquatic life | A sanitary closure to bivalve shellfish harvesting in Mill Bay is currently in place (Fisheries and Oceans Canada, 2021). | Applies to bivalve shellfish harvesting in Mill Bay | high |
| #Q042 | monitoring | reporting | recommended | Field Duplicate Sampling Requirement | other | Field duplicate samples were collected in accordance with BC ENV standards that specify a minimum of 10% of samples should be collected in duplicate on each sampling date. | Required for monitoring programs following BC ENV standards | high |
| Req ID | Category | Intent | Legal Status | Name | Subdomain(s) | Limit Type | Limit Value | Context | Conditions | Confidence |
|---|---|---|---|---|---|---|---|---|---|---|
| #P001 | microbiological | health | recommended | Enterococci | aquatic life, recreational water | requirement | <= 4 CFU/100 mL | Marine water WQO for Mill Bay | Calculated based on five samples in 30 days | high |
| #P002 | microbiological | health | recommended | Fecal coliforms | aquatic life, recreational water | requirement | <= 14 CFU/100 mL | Marine water WQO for Mill Bay | Calculated based on five samples in 30 days | high |
| #P003 | physical | health | guideline | Dissolved Oxygen | aquatic life | requirement | >= 5 mg/L | BC WQG for protection of aquatic life in freshwater | Minimum instantaneous concentration | high |
| #P004 | physical | health | guideline | Dissolved Oxygen | aquatic life | requirement | >= 8 mg/L | BC WQG for protection of aquatic life in freshwater | 30-day mean | high |
| #P005 | physical | unknown | recommended | Turbidity | aquatic life, drinking water | MAC | <= 5 NTU | Cowichan/Koksilah River Water Quality Objectives applied to Mill Bay tributaries | Oct to Apr (turbid flows) | high |
| #P006 | physical | unknown | recommended | Turbidity | aquatic life, drinking water | MAC | <= 2 NTU | Cowichan/Koksilah River Water Quality Objectives applied to Mill Bay tributaries | May to Sept (clear flow periods) | high |
| #P007 | physical | unknown | recommended | Total Suspended Solids | aquatic life | requirement | <= 7 mg/L | Cowichan/Koksilah River Water Quality Objectives | high | |
| #P008 | chemical | health | guidance | Total Phosphorus | aquatic life | requirement | <= 5 μg/L | Vancouver Island Phosphorus Guidance document | May to Sept | high |
| #P009 | chemical | health | guidance | Total Phosphorus | aquatic life | MAC | <= 10 μg/L | Vancouver Island Phosphorus Guidance document | May to Sept | high |
| #P010 | chemical | aesthetic | guideline | Chlorophyll a | recreational water | MAC | <= 50 mg/m2 | Recreational guideline in streams | high | |
| #P011 | chemical | health | guideline | Chlorophyll a | aquatic life | MAC | <= 100 mg/m2 | Aquatic life guideline in streams | high | |
| #P012 | chemical | health | recommended | Total Copper | aquatic life | requirement | <= 2 μg/L | Cowichan/Koksilah River Water Quality Objectives | Based on lowest observed water hardness of 20 mg/L | high |
| #P013 | microbiological | health | guideline | Escherichia coli | drinking water | requirement | <= 10 CFU/100 mL | Drinking Water Sources | high | |
| #P014 | physical | aesthetic | guideline | pH | drinking water | AO | 6.5-8.5 pH units | Aesthetic objective for drinking water | high | |
| #P015 | physical | health | guideline | pH | aquatic life | requirement | 6.5-9.0 pH units | Aquatic life guideline | high | |
| #P016 | chemical | health | guideline | Nitrate | drinking water | MAC | <= 10 mg/L | BC guideline for nitrate as nitrogen in drinking water | high | |
| #P017 | chemical | health | guideline | Nitrite | drinking water | MAC | <= 1 mg/L | BC guideline for nitrite as nitrogen in drinking water | high | |
| #P018 | physical | unknown | recommended | Non-filterable Residue/Total Suspended Solids (TSS) | aquatic life | requirement | <= 27 mg/L | Freshwater objective applied to Mill Bay tributaries | Maximum value | high |
| #P019 | chemical | health | recommended | Total Copper | aquatic life | requirement | <= 4 μg/L | Freshwater objective applied to Mill Bay tributaries | Maximum value | high |
| #P020 | chemical | health | guideline | Total Arsenic | aquatic life | requirement | <= 5 μg/L | Freshwater guideline for Mill Bay tributaries | Maximum value | high |
| #P021 | chemical | health | guideline | Total Iron | aquatic life | requirement | <= 1000 μg/L | Freshwater guideline for Mill Bay tributaries | Maximum value | high |
| #P022 | chemical | health | guideline | Total Manganese | aquatic life | requirement | <= 800 μg/L | Freshwater guideline for Mill Bay tributaries | Maximum value | high |
| #P023 | chemical | health | recommended | Total Zinc | aquatic life | requirement | <= 7.5 μg/L | Freshwater objective applied to Mill Bay tributaries | Mean value | high |
| #P024 | chemical | health | recommended | Total Zinc | aquatic life | requirement | <= 33 μg/L | Freshwater objective applied to Mill Bay tributaries | Maximum value | high |
| #P025 | chemical | health | recommended | Ammonia (Oct to Apr) | aquatic life | requirement | <= 1.31 mg/L | Cowichan/Koksilah River Objectives | October to April (mean) | high |
| #P026 | chemical | health | recommended | Ammonia (May to Sept) | aquatic life | requirement | <= 0.49 mg/L | Cowichan/Koksilah River Objectives | May to September (mean) | high |
| #P027 | chemical | health | recommended | Total Lead | aquatic life | requirement | <= 4 μg/L | Cowichan/Koksilah River Objectives | Mean value | high |
| #P028 | chemical | health | recommended | Total Lead | aquatic life | requirement | <= 11 μg/L | Cowichan/Koksilah River Objectives | Maximum value | high |
| #P029 | physical | health | recommended | Temperature | aquatic life | requirement | <= 17 °C | Cowichan/Koksilah River Objectives for trout and juvenile salmonids | Weekly mean at any location | high |
| #P030 | physical | health | recommended | Dissolved Oxygen (Oct to May) | aquatic life | requirement | >= 11.2 mg/L | Cowichan/Koksilah River Objectives for eyed or hatched fish eggs | October to May | high |
| #P031 | physical | health | recommended | Dissolved Oxygen (June to Sept) | aquatic life | requirement | >= 8 mg/L | Cowichan/Koksilah River Objectives for alevins and juvenile fish | June to September | high |
| #P032 | microbiological | health | guideline | Enterococci (Shellfish Harvesting) | aquatic life | requirement | <= 11 CFU/100 mL | BC ENV Approved Water Quality Guideline | 90th percentile of at least five samples in 30 days | high |
| #P033 | microbiological | health | guideline | Enterococci (Recreation) | recreational water | requirement | <= 35 CFU/100 mL | BC ENV Approved Water Quality Guideline | Geometric mean of at least five samples in 30 days | high |
| #P034 | microbiological | health | guideline | Enterococci (Recreation Single Sample) | recreational water | requirement | <= 70 CFU/100 mL | BC ENV Approved Water Quality Guideline | Single sample | high |
| #P035 | microbiological | health | guideline | Fecal coliforms (Shellfish Harvesting) | aquatic life | requirement | <= 43 CFU/100 mL | BC ENV Approved Water Quality Guideline | 90th percentile of at least five samples in 30 days | high |
| #P036 | microbiological | health | guideline | E. coli (Shellfish Harvesting) | aquatic life | requirement | <= 14 CFU/100 mL | BC ENV Approved Water Quality Guideline | Median of at least five samples in 30 days | high |
| #P037 | microbiological | health | guideline | E. coli (Shellfish Harvesting) | aquatic life | requirement | <= 43 CFU/100 mL | BC ENV Approved Water Quality Guideline | 90th percentile of at least five samples in 30 days | high |
| #P038 | microbiological | health | guideline | E. coli (Recreation) | recreational water | requirement | <= 200 CFU/100 mL | BC ENV Approved Water Quality Guideline | Geometric mean of at least five samples in 30 days | high |
| #P039 | microbiological | health | guideline | E. coli (Recreation Single Sample) | recreational water | requirement | <= 400 CFU/100 mL | BC ENV Approved Water Quality Guideline | Single sample | high |
| #P040 | chemical | health | guideline | Total Selenium (Alert) | aquatic life | requirement | <= 1 μg/L | BC ENV approved guideline alert concentration | high | |
| #P041 | chemical | health | guideline | Total Mercury (Drinking Water) | drinking water | MAC | <= 1 μg/L | BC ENV approved guideline | Maximum value | high |
| #P042 | chemical | health | guideline | Total Mercury (Aquatic Life) | aquatic life | requirement | <= 0.00125 μg/L | BC ENV approved guideline | Average value | high |
| #P043 | chemical | health | guideline | Nitrate (as Nitrogen) | aquatic life | MAC | <= 32.8 mg/L | BC aquatic life guideline for nitrate | high | |
| #P044 | chemical | health | guideline | Nitrate (as Nitrogen) | aquatic life | requirement | <= 3 mg/L | BC aquatic life guideline for nitrate | high | |
| #P045 | chemical | health | guideline | Nitrite (as Nitrogen) | aquatic life | MAC | <= 0.06 mg/L | BC aquatic life guideline for nitrite in low chloride waters (< 2 mg/L) | Low chloride waters | high |
| #P046 | chemical | health | guideline | Nitrite (as Nitrogen) | aquatic life | requirement | <= 0.02 mg/L | BC aquatic life guideline for nitrite in low chloride waters (< 2 mg/L) | Low chloride waters | high |
| #P047 | chemical | health | guideline | Total Boron | aquatic life | requirement | <= 1200 μg/L | Approved guideline for protection of FW aquatic life | Maximum value | high |
| #P048 | chemical | health | guideline | Total Manganese | aquatic life | requirement | <= 700 μg/L | Approved guideline for protection of FW aquatic life | Average value | high |
| #P049 | chemical | health | guideline | Total Molybdenum | aquatic life | requirement | <= 1000 μg/L | Approved guideline for protection of FW aquatic life | Average value | high |
| #P050 | chemical | health | guideline | Total Molybdenum | aquatic life | requirement | <= 50 μg/L | Approved guideline for protection of wildlife | Maximum value | high |
| #P051 | physical | treatment | guidance | Turbidity | drinking water | treatment_goal | <= 1 NTU | VIHA goal for unfiltered surface source drinking water | 95% of days; sampled immediately before disinfection | high |
| #P052 | microbiological | health | guideline | Enterococci | drinking water | requirement | <= 3 CFU/100 mL | Drinking Water Sources benchmark | high | |
| #P053 | chemical | health | recommended | Chlorophyll a | aquatic life | requirement | <= 5.0 μg/m2 | Revised Objectives (2011) for periphytic algae | Applicable downstream of PE-247 and PE-1497 | high |
| #P054 | chemical | health | guideline | Nitrate and Nitrite (Combined) | drinking water | MAC | <= 10 mg/L | BC guideline for drinking water when both nitrate and nitrite are present | high | |
| #P055 | physical | treatment | guideline | Induced Turbidity (Background < 5 NTU) | drinking water | requirement | 1 NTU | BC guideline for drinking water sources not receiving treatment to remove turbidity | Induced turbidity over background when background is less than 5 NTU | high |
| #P056 | physical | treatment | guideline | Induced Turbidity (Turbid Periods) | drinking water | requirement | 5 NTU | BC guideline for drinking water sources not receiving treatment to remove turbidity | Maximum change from background during turbid flow periods | high |
| #P057 | chemical | health | guideline | Total Lead | aquatic life | requirement | <= 3 μg/L | BC ENV hardness-adjusted guideline (Table 21) | Based on lowest observed hardness of 23 mg/L | high |
| #P058 | chemical | health | recommended | Ammonia (Oct to Apr) Max | aquatic life | requirement | <= 6.83 mg/L | Cowichan/Koksilah River Objectives | October to April | high |
| #P059 | chemical | health | recommended | Ammonia (May to Sept) Max | aquatic life | requirement | <= 3.61 mg/L | Cowichan/Koksilah River Objectives | May to September | high |
| #P060 | physical | treatment | guidance | Turbidity (VIHA Limit) | drinking water | requirement | <= 5 NTU | VIHA goal for unfiltered surface source drinking water | Maximum value for surface source water | high |
| #P061 | chemical | health | guideline | Total Antimony | aquatic life | requirement | <= 9 μg/L | BC working water quality guideline | Average value | high |
| #P062 | chemical | health | guideline | Total Barium | aquatic life | requirement | <= 1000 μg/L | BC working water quality guideline | Average value | high |
| #P063 | chemical | health | guideline | Total Beryllium | aquatic life | requirement | <= 0.13 μg/L | BC working water quality guideline | Average value | high |
| #P064 | chemical | health | guideline | Total Chromium | aquatic life | requirement | <= 8.9 μg/L | BC working water quality guideline | Average value | high |
| #P065 | chemical | health | guideline | Total Cobalt Max | aquatic life | requirement | <= 110 μg/L | BC approved water quality guideline | Maximum value | high |
| #P066 | chemical | health | guideline | Total Cobalt Average | aquatic life | requirement | <= 4 μg/L | BC approved water quality guideline | Average value | high |
| #P067 | chemical | health | guideline | Total Nickel | aquatic life | requirement | <= 25 μg/L | BC working water quality guideline | Average value | high |
| #P068 | chemical | health | guideline | Total Silver Max | aquatic life | requirement | <= 0.1 μg/L | BC approved water quality guideline | Maximum value | high |
| #P069 | chemical | health | guideline | Total Silver Average | aquatic life | requirement | <= 0.05 μg/L | BC approved water quality guideline | Average value | high |
| #P070 | chemical | health | guideline | Total Thallium | aquatic life | requirement | <= 0.8 μg/L | BC working water quality guideline | Average value | high |
| #P071 | chemical | health | guideline | Total Uranium | aquatic life | requirement | <= 8.5 μg/L | BC working water quality guideline | Average value | high |
| #P072 | chemical | health | recommended | Total Phosphorus (Table 7) | aquatic life | requirement | <= 7 μg/L | Cowichan/Koksilah River Objectives | May to Sept | high |
| #P073 | physical | health | guidance | Mean Annual Discharge (MAD) | aquatic life | requirement | 20 % | BC ENV endorsement for waterways modified by flow control structures | To protect healthy fish habitat | high |
| #P074 | physical | aesthetic | guideline | Temperature (Aesthetic Objective) | drinking water | AO | < 15 °C | Drinking water supply recommendation | high | |
| #P075 | physical | health | guideline | Induced Total Suspended Solids (Short-term) | aquatic life | requirement | 25 mg/L | BC guideline for protection of aquatic life (clear flows) | Maximum induced concentration over background; background <= 25 mg/L | high |
| #P076 | physical | health | guideline | Induced Total Suspended Solids (Long-term) | aquatic life | requirement | 5 mg/L | BC guideline for protection of aquatic life (clear flows) | Induced concentration over background | high |
| Req ID | Category | Name | Context | Confidence |
|---|---|---|---|---|
| #D001 | BC | British Columbia | high | |
| #D002 | ENV | Ministry of Environment and Climate Change Strategy | high | |
| #D003 | MBWD | Mill Bay Waterworks District | high | |
| #D004 | CVRD | Cowichan Valley Regional District | high | |
| #D005 | FRPA | Forest and Range Practices Act | high | |
| #D006 | CDFb | Coastal Douglas Fir biogeoclimatic zone (wet) | high | |
| #D007 | NAL | Nanaimo Lowland | high | |
| #D008 | SWE | snow water equivalent | high | |
| #D009 | WSC | Water Survey Canada | high | |
| #D010 | OCP | Official Community Plan | high | |
| #D011 | Vulnerability | the potential for an aquifer to be degraded by contaminants, based on the aquifer's hydrogeological characteristics. | high | |
| #D012 | Designated water uses | those identified for protection in a specific watershed or waterbody. | high | |
| #D013 | LWMP | Liquid Waste Management Plan | high | |
| #D014 | MAD | Mean Annual Discharge | high | |
| #D015 | ECCC | Environment and Climate Change Canada | high | |
| #D016 | DO | dissolved oxygen | high | |
| #D017 | TSS | Total suspended solids | high | |
| #D018 | RISC | Resource Inventory Standards Committee | high | |
| #D019 | DL | detection limit | high | |
| #D020 | QA/QC | Quality Assurance/Quality Control | high | |
| #D021 | NTU | nephelometric turbidity units | high | |
| #D022 | Total suspended solids (TSS) | include all the undissolved particulate matter in a sample. | high | |
| #D023 | Primary contact | direct contact with water over most of the body's surface, to the point of complete submergence, or where there is substantial risk of ingestion or intimate contact with eyes, ears, nose, mouth or groin, such as swimming and scuba diving. | high | |
| #D024 | Secondary contact | an activity where a person would have very limited direct contact with the water, usually only the feet and hands, and little risk of complete immersion, such as boating, kayaking, canoeing, and fishing. | high | |
| #D025 | VIHA | Vancouver Island Health Authority | high | |
| #D026 | 5-in-30 sampling | Five weekly samples were collected over 30 days | high | |
| #D027 | NFR | non-filterable residue | high | |
| #D028 | E. coli | Escherichia coli | high | |
| #D029 | Escherichia coli | a thermotolerant coliform considered to be specifically of fecal origin | high | |
| #D030 | fecol coliforms | a subgroup of the total coliforms more appropriately termed thermotolerant coliforms as they can grow at elevated temperatures | high | |
| #D031 | enterococcus | a subgroup of the fecal streptococci, normally found in the gastrointestical tract of warm-blooded animals | high | |
| #D032 | MST | microbial source tracking | high | |
| #D033 | community watershed | the drainage area above the downstream point of diversion and which are licensed under the Water Act for waterworks purposes | high | |
| #D034 | pH | measures the concentration of hydrogen ions (H+ ) in water. | high | |
| #D035 | Conductivity | refers to the ability of a substance to conduct an electric current. | high | |
| #D036 | Turbidity | a measure of the clarity or cloudiness of water and is measured by the amount of light scattered by the particles in the water as nephelometric turbidity units (NTU). | high | |
| #D037 | Chlorophyll a | the green pigment in algae and is indicative of algal productivity. | high | |
| #D038 | fecal coliforms | a subgroup of the total coliforms more appropriately termed thermotolerant coliforms as they can grow at elevated temperatures | high | |
| #D039 | thermotolerant coliforms | a subgroup of the total coliforms (fecal coliforms) as they can grow at elevated temperatures | high | |
| #D040 | fecal coliforms | a subgroup of the total coliforms more appropriately termed thermotolerant coliforms as they can grow at elevated temperatures | high | |
| #D041 | biota | plant and animal life | high | |
| #D042 | turnover | vertical mixing of the water column | high | |
| #D043 | giardiasis | beaver fever | high | |
| #D044 | fall freshet period | October and November | high | |
| #D045 | summer dry period | between August and September | high | |
| #D046 | ecoregion | terrestrial ecoregions, based on similar climate, geology, soils and hydrology | high | |
| #D047 | specific conductivity | conductivity is normalized to 25 ⁰ C | high | |
| #D048 | cryptosporidiosis | gastrointestinal disease | high | |
| #D049 | Island Health | Vancouver Island Health Authority | high | |
| #D050 | fall flush | October-November | high | |
| #D051 | clear-flow period | May through September | high | |
| #D052 | turbid-flow period | October through April | high | |
| #D053 | Water quality objectives | goals that need to be met to ensure protection of designated water uses. | high | |
| #D054 | ALR | Agricultural Land Reserve | high |