| Req ID | Category | Intent | Legal Status | Name | Subdomain(s) | Context | Conditions | Confidence |
|---|---|---|---|---|---|---|---|---|
| #Q001 | administrative | operational | recommended | Water Safety Plan Strategy | drinking water | a priority focus on drinking water process management, for example, through the implementation of a source-to-tap or water safety plan approach, is the recommended strategy for water utilities to manage potential risks. | high | |
| #Q002 | operational | reporting | recommended | Education and Outreach Programs | drinking water | Water utilities should also have education and outreach programs to make consumers aware of how water quality can deteriorate within residential and building plumbing systems. | high | |
| #Q003 | administrative | health | recommended | Building Water Management Plans | drinking water | Building water management plans are the recommended best practice for building owners/managers. | high | |
| #Q004 | operational | operational | recommended | Multi-parametric Risk Management | drinking water | water utilities and building owners/managers should have appropriate risk management strategies that utilize multiple parameters to assess the performance of drinking water treatment and/or distribution operations. | high | |
| #Q005 | monitoring | health | recommended | Source Water Assessment Scope | drinking water | Source water assessments should include: the identification of potential sources of microbiological contamination in the watershed/aquifer; potential pathways and/or events (low to high risk) by which microorganisms of concern can make their way into the source water and affect water quality; and conditions likely to lead to peak concentrations. | high | |
| #Q006 | monitoring | operational | recommended | Subsurface Source Assessments | drinking water | Assessments for subsurface sources should include, at a minimum, a hydrogeological assessment, an evaluation of well integrity and a survey of activities and physical features in the area | When evaluating subsurface drinking water sources | high |
| #Q007 | monitoring | health | guidance | Inclusion of Aerosol-generating Activities in Assessments | drinking water | It is important that risks from both land-based and aerosol-generating activities (e.g., spray irrigation, pressure washers) be considered in the source water assessment. | high | |
| #Q008 | monitoring | operational | recommended | Source Nutrient Characterization | drinking water | surface and subsurface sources should be characterized with regard to organic and inorganic nutrient concentrations | high | |
| #Q009 | treatment | health | recommended | Biological Stability Goal | drinking water | Water utilities should therefore aim to produce biologically stable water to minimize the potential for problems to occur in distribution and premise plumbing systems | high | |
| #Q010 | treatment | treatment | guidance | Optimize Treatment for Turbidity and NOM | drinking water | optimize treatment performance for turbidity and natural organic matter removal | high | |
| #Q011 | treatment | treatment | guidance | Apply Primary Disinfection | drinking water | properly apply primary disinfection technologies to meet appropriate CT (disinfectant concentration in mg/L x time in minutes) requirements when using chemical oxidants (i.e., free chlorine, ozone, chlorine dioxide) or IT (intensity measured in mW/cm2 or W/m 2x time measured in seconds resulting in a computed fluence in mJ/cm2) requirements when using ultraviolet (UV) disinfection | high | |
| #Q012 | treatment | treatment | guidance | Minimize Nutrient Concentrations | drinking water | minimize nutrient concentrations in treated water and have a good understanding of their concentrations in the distribution system | high | |
| #Q013 | treatment | treatment | guidance | Minimize Scaling and Corrosion | drinking water | optimize treatment to minimize the amount of scaling and/or corrosion in the distribution system | high | |
| #Q014 | treatment | treatment | guidance | Apply Secondary Disinfection | drinking water | properly apply secondary disinfection technologies (i.e., free chlorine or monochloramine) for residual maintenance in the distribution system | high | |
| #Q015 | monitoring | operational | guidance | Conduct Plant Performance Testing | drinking water | conduct performance testing using multiple parameters (e.g., disinfectant residual, microbiological indicators, pH, turbidity) | high | |
| #Q016 | operational | operational | guidance | Provide Operator Training | drinking water | provide operator training to assure the effectiveness of the water safety plan at all times | high | |
| #Q017 | prohibition | treatment | recommended | Monochloramine Application Restriction | drinking water | It is important to note that monochloramine is recommended only for secondary disinfection and residual maintenance in the distribution system | high | |
| #Q018 | treatment | health | guidance | Maintain Effective Disinfectant Residual | drinking water | Maintaining an effective disinfectant residual is essential to manage risks. | Within drinking water distribution systems | high |
| #Q019 | monitoring | operational | recommended | Multi-parametric Distribution Monitoring | drinking water | Comprehensive, multi-parametric monitoring programs (e.g., disinfectant residual paired with temperature and biofilm formation rate) are recommended to confirm system-specific requirements | high | |
| #Q020 | design | operational | guidance | Use Proper Construction Materials | drinking water | use proper construction materials | Distribution system operations | high |
| #Q021 | corrective_action | health | guidance | Preventive Action for Low Residuals | drinking water | maintain an effective disinfectant residual and take preventive/corrective actions when low disinfectant residuals occur, particularly during warm water temperature conditions when biofilm growth accelerates | high | |
| #Q022 | operational | operational | guidance | Manage Water Age and Temperature | drinking water | manage water age and the effects of temperature | high | |
| #Q023 | operational | health | guidance | Minimize Contaminant Entry Potential | drinking water | minimize the potential for contaminant entry from external sources (e.g., maintain positive pressure, implement cross-connection/backflow control programs, practice strict hygiene during mains constructions and repairs) | high | |
| #Q024 | operational | operational | guidance | Clean Distribution System | drinking water | keep the distribution system clean by removing biofilm, loose deposits and sediment from watermains and storage facilities (e.g., use of appropriate flushing and cleaning techniques) | high | |
| #Q025 | reporting | reporting | recommended | Customer Premise Plumbing Education | drinking water | water utilities should educate their customers of the potential for water quality deterioration in premise plumbing. | high | |
| #Q026 | operational | health | mandatory | Building Owner Responsibility | drinking water | Building owners/managers are responsible for managing water quality within their buildings and therefore should be aware of practices that reduce the risk of microorganism growth. | high | |
| #Q027 | design | operational | guidance | Limit Nutrient Levels in Plumbing | drinking water | limiting nutrient levels through an emphasis on system design and materials | high | |
| #Q028 | design | operational | guidance | Minimize Stagnation Areas | drinking water | minimizing areas of low flow/stagnation | high | |
| #Q029 | operational | operational | guidance | Manage Plumbing Temperatures | drinking water | keeping temperatures of cold and hot water systems outside of the ideal range for microorganism growth (e.g., cold water less than 20C, hot water tank temperature greater than 60C; hot water lines at distal points ideally greater than 55C) | high | |
| #Q030 | operational | health | guidance | Reduce Contaminated Aerosols | drinking water | reducing the formation and transmission of contaminated aerosols from system components such as cooling towers, showers, faucets, hot tubs and humidifiers. | high | |
| #Q031 | administrative | reporting | recommended | Confirm Jurisdiction Requirements | drinking water | In addition, building owners/managers should contact the responsible authority in the affected jurisdiction to confirm if specific requirements will apply to their system (e.g., cooling tower registry). | high | |
| #Q032 | administrative | operational | recommended | Consult Climate Forecasts | drinking water | The responsible authority should be consulted to discuss relevant forecast scenarios. | high | |
| #Q033 | administrative | operational | recommended | Integrate Climate Change Risks | drinking water | Thus, water utilities and building owners/managers should integrate the risks associated with climate change into their management strategies to maximize the reliability, robustness and resilience of their water systems. | high | |
| #Q034 | monitoring | health | guidance | Residential Well Inspection and Testing | drinking water | For residential-scale systems and private wells, regular physical inspection to identify deficiencies and testing of the water system (e.g., for Escherichia coli and total coliforms) to confirm the microbiological quality of the water are important. | high | |
| #Q035 | design | treatment | recommended | Use of Certified Treatment Devices | drinking water | Where treatment is necessary, Health Canada recommends that consumers use devices certified by an accredited certification body as meeting the appropriate NSF International (NSF)/American National Standards Institute (ANSI) drinking water treatment unit standards | high | |
| #Q036 | prohibition | treatment | recommended | Monochloramine Prohibition for Primary Disinfection | drinking water | Monochloramine should not be used for primary disinfection due to its low oxidation potential; monochloramine is recommended only for secondary disinfection | high | |
| #Q037 | administrative | operational | recommended | Obtain Local Guidance | drinking water | Specific guidance on construction, operation, maintenance and testing should be obtained from the responsible drinking water authority in the affected jurisdiction. | high | |
| #Q038 | monitoring | health | recommended | Facility Environmental Monitoring | drinking water | environmental monitoring at individual facilities should be informed by a site-specific risk assessment as part of a Water Management Plan | high | |
| #Q039 | operational | treatment | recommended | Consult Professional for Supplemental Disinfection | drinking water | A water treatment professional should be consulted before applying any supplemental disinfection. | high | |
| #Q040 | administrative | health | recommended | Pseudomonas Management Plans | drinking water | Water management/water safety plans are recommended for the management of Pseudomonas aeruginosa in building water systems | high | |
| #Q041 | operational | health | recommended | Contact Lens Safety Guidance | drinking water | Individuals in the home who wear contact lenses should also follow guidance from their eye care providers on proper lens handling, cleaning and wear | high | |
| #Q042 | treatment | health | recommended | Naegleria Control with Free Chlorine | drinking water | Maintaining a minimum free chlorine residual of 0.5 mg/L throughout the distribution system is recommended for the control of N. fowleri in vulnerable drinking water systems | In vulnerable drinking water systems | high |
| #Q043 | operational | health | recommended | Nasal Rinse Safety | drinking water | individuals should ensure that they conduct nasal rinses using water that has been boiled and cooled, or distilled water. | high | |
| #Q044 | administrative | operational | mandatory | FWQMS Program Conformity | other | The Freshwater Quality Monitoring and Surveillance (FWQMS) program activities are accomplished in collaboration with provincial and territorial governments, and in conformity with the Canada Water Act. | high | |
| #Q045 | monitoring | operational | mandatory | Risk-Based Monitoring Conduct | other | ECCC conducts the monitoring and surveillance activities based on the level of risk to water quality in a watershed. | high | |
| #Q046 | monitoring | operational | mandatory | Monitoring Jurisdictional Scope | aquatic life, other | Environment and Climate change Canada (ECCC) monitors freshwater quality on: federal lands, transboundary watersheds, inland waters | high | |
| #Q047 | monitoring | operational | mandatory | Risk Assessment Methodology | other | The risk is assessed regarding the stress determined by: the nature, the probability, the frequency, the severity | high | |
| #Q048 | monitoring | operational | mandatory | CEPA Surveillance Mandate | other | Surveillance studies under the Canadian Environmental Protection Act, including the Chemicals Management Plan | high | |
| #Q049 | reporting | reporting | mandatory | FSDS Indicator Reporting | aquatic life, other | Reports on national and ecosystem-based indicators under the Federal Sustainable Development Strategy | high | |
| #Q050 | monitoring | operational | mandatory | Priority Ecosystem Monitoring and Assessment | aquatic life, other | Monitoring and assessment of Government of Canada priority ecosystems and programs, like the Great Lakes, St. Lawrence River Basin, Lake Winnipeg, and northeastern British Columbia, and through participation in initiatives such as the Canada-Alberta Joint Oil Sands Monitoring Program | high | |
| #Q051 | reporting | reporting | mandatory | Freshwater Quality Indicator Development | aquatic life, other | Development of the freshwater quality indicator (WQI) for the Canadian Environmental Sustainability Indicators (CESI). | high |
| Req ID | Category | Intent | Legal Status | Name | Subdomain(s) | Limit Type | Limit Value | Context | Conditions | Confidence |
|---|---|---|---|---|---|---|---|---|---|---|
| #P001 | operational | treatment | recommended | Minimum disinfectant residual concentration | drinking water | requirement | > 0.2 mg/L | Required to control microbiological (re)growth in the distribution system. | Drinking water distribution systems. | high |
| #P002 | operational | treatment | recommended | Free chlorine residual for controlling biofilm formation | drinking water | OG | 1.0 mg/L | For systems that chlorinate, to control biofilm formation. | Drinking water distribution systems. | high |
| #P003 | operational | treatment | recommended | Total chlorine residual for controlling biofilm formation | drinking water | OG | 1.8 mg/L | For systems that chloraminate, to control biofilm formation. | Drinking water distribution systems. | high |
| #P004 | physical | operational | recommended | Cold water system temperature | drinking water | OG | < 20 °C | Keeping temperatures of cold water systems outside of the ideal range for microorganism growth. | Premise plumbing systems. | high |
| #P005 | physical | operational | recommended | Hot water tank temperature | drinking water | OG | > 60 °C | Keeping temperatures of hot water systems outside of the ideal range for microorganism growth. | Premise plumbing systems. | high |
| #P006 | physical | operational | recommended | Hot water lines at distal points temperature | drinking water | OG | > 55 °C | Ideally greater than 55°C to prevent microorganism growth. | Premise plumbing systems at distal points. | medium |
| #P007 | microbiological | health | guidance | Legionella action level | drinking water, other | requirement | 50,000 CFU/L | A concentration that warrants concern and should be considered an action level to trigger remedial activities. | Routine sampling programs at various water systems (cooling towers, wastewater, etc.). | high |
| #P008 | physical | operational | recommended | Water outlet temperature for showerheads and bathtubs | drinking water | OG | <= 49 °C | Specified by the National Plumbing Code (NPC) to reduce the risk of scalding. | Water valves supplying showerheads and bathtubs. | high |
| #P009 | operational | treatment | recommended | Minimum free chlorine residual for control of N. fowleri | drinking water | OG | 0.5 mg/L | Recommended for the control of N. fowleri in vulnerable drinking water systems. | Vulnerable drinking water distribution systems. | high |
| #P010 | operational | treatment | recommended | Chloramine residual for N. fowleri control | drinking water | OG | > 1.5 mg/L | Suggested best practice throughout the distribution system, sufficient for N. fowleri control. | Drinking water distribution systems. | high |
| #P011 | operational | treatment | guidance | Cryptosporidium oocysts UV dose (4 log inactivation) | drinking water | treatment_goal | 22 mJ/cm2 | Relative UV dose requirements for 4 log inactivation. | high | |
| #P012 | operational | treatment | guidance | Giardia cysts UV dose (4 log inactivation) | drinking water | treatment_goal | 22 mJ/cm2 | Relative UV dose requirements for 4 log inactivation. | high | |
| #P013 | microbiological | operational | guidance | Legionella Action Level (Cooling Towers) | other | requirement | > 1000 to > 1,000,000 CFU/L | Range of recommendations from various agencies for action levels. | Cooling towers. | high |
| #P014 | microbiological | health | guidance | Legionella Action Level (Potable Water Systems) | drinking water | requirement | > 1000 to > 10,000 CFU/L | Range of recommendations from various agencies for potable systems. | Potable water systems in buildings. | high |
| #P015 | operational | treatment | guidance | Free chlorine residual for health-care facilities | drinking water | requirement | 0.3 to 0.5 mg/L | Recommended targets for Legionella control in health-care and aged care facility water systems. | Plumbing systems in health-care/aged care facilities. | high |
| #P016 | operational | treatment | guidance | Monochloramine residual for health-care facilities | drinking water | requirement | 1.5 mg/L | Recommended target for Legionella control in building water systems. | Health-care facility plumbing systems. | high |
| #P017 | operational | treatment | guidance | Free chlorine residual for Pseudomonas control | drinking water | OG | > 0.3 mg/L | Useful for control of Pseudomonas spp. in bulk water. | Bulk water in distribution systems. | high |
| #P018 | microbiological | treatment | guideline | UV dose for 4-log Adenovirus inactivation | drinking water | treatment_goal | 51 to 261 mJ/cm2 | Relative UV dose requirements for virus inactivation. | Drinking water treatment. | high |
| #P019 | microbiological | treatment | guideline | UV dose for 4-log Naegleria fowleri cysts inactivation | drinking water | treatment_goal | 121 mJ/cm2 | Relative UV dose requirements for cysts. | Drinking water treatment. | high |
| #P020 | microbiological | treatment | guideline | Free chlorine CT for 3-log Mycobacterium avium inactivation | drinking water | treatment_goal | 51 to 1552 mg*min/L | Inactivation requirements (5-25°C, pH 6-9). | Drinking water treatment. | high |
| #P021 | operational | operational | guideline | Aeromonas monitoring target limit (Netherlands) | drinking water | OG | < 1000 CFU/100 mL | Target limit specified in Dutch drinking water legislation based on treatment achievability. | Netherlands jurisdiction operational parameter. | high |
| #P022 | design | treatment | recommended | Thermal shock temperature for Legionella remediation | other | OG | 70 °C | Stringent thermal shock used as an extreme remediation measure in building systems. | Applied for a duration of 30 minutes. | high |
| #P023 | operational | treatment | guidance | CT for 2 log inactivation of biofilm-associated Legionella (Free chlorine) | drinking water | requirement | 8.86 mg·min/L | CT values determined for Legionella pneumophila strain Philadelphia-1 serogroup 1 associated with biofilm on PVC. | pH = 8, temperature = 21 °C. | high |
| #P024 | operational | treatment | guidance | CT for 2 log inactivation of biofilm-associated Legionella (Monochloramine) | drinking water | requirement | 17.16 mg·min/L | CT values determined for Legionella pneumophila associated with biofilm on PVC. | pH = 8, temperature = 21 °C. | high |
| #P025 | design | treatment | recommended | Typical design CT for 4 log virus inactivation | drinking water | requirement | 12 to 15 mg·min/L | Typical design CTs required to achieve 4 log virus inactivation using free chlorine. | Free chlorine treatment. | high |
| #P026 | design | treatment | recommended | Typical design CT for 0.5 log Giardia inactivation | drinking water | requirement | 35 to 65 mg·min/L | Typical design CTs required to achieve 0.5 log Giardia inactivation using free chlorine. | Free chlorine treatment. | high |
| #P027 | operational | treatment | guidance | Superheat and flush temperature for Mycobacterium control | other | requirement | > 50 to 70 °C | Supplemental control measure in health care facilities involving hot water disinfection. | Healthcare facility plumbing systems. | high |
| #P028 | microbiological | treatment | guideline | Free chlorine CT for Acanthamoeba species cysts | drinking water | treatment_goal | 1300 mg·min/L | CT values required for 2 log reduction using free chlorine (5-25°C, pH 6-9). | Free chlorine treatment. | high |
| #P029 | microbiological | treatment | guideline | UV dose for 4 log Acanthamoeba spp. cysts inactivation | drinking water | treatment_goal | 167 mJ/cm2 | UV dose requirements for 4 log reduction. | UV disinfection. | high |
| #P030 | microbiological | treatment | guidance | Aeromonas species 2-log CT (Free chlorine) | drinking water | treatment_goal | 0.2 to 1.4 mg·min/L | Relative CT values for 2 log inactivation at 5-25°C, pH 6-9. | Free chlorine treatment. | high |
| #P031 | microbiological | treatment | guidance | Pseudomonas species 2-log CT (Free chlorine) | drinking water | treatment_goal | 0.0073 to 4.3 mg·min/L | Relative CT values for 2 log inactivation at 5-25°C, pH 6-9. | Free chlorine treatment. | high |
| #P032 | microbiological | treatment | guidance | Enteric pathogens (E. coli, Campylobacter, Helicobacter, Salmonella, Yersinia) 2-log CT (Free chlorine) | drinking water | treatment_goal | 0.034 to 5.1 mg·min/L | Relative CT values for 2 log inactivation at 5-25°C, pH 6-9. | Free chlorine treatment. | high |
| #P033 | microbiological | treatment | guidance | Enteric viruses 2-log CT (Free chlorine) | drinking water | treatment_goal | 0.01 to 12 mg·min/L | Relative CT values for 2 log inactivation at 5-25°C, pH 6-9. | Free chlorine treatment. | high |
| #P034 | microbiological | treatment | guidance | Legionella pneumophila 3-4 log CT (Free chlorine) | drinking water | treatment_goal | 0.1 to 0.3 mg·min/L | Relative CT values for 3-4 log inactivation at 5-25°C, pH 6-9. | Free chlorine treatment. | high |
| #P035 | microbiological | treatment | guidance | Naegleria fowleri cysts 4-log CT (Free chlorine) | drinking water | treatment_goal | 31 to 37 mg·min/L | Relative CT values for 4 log inactivation at 5-25°C, pH 6-9. | Free chlorine treatment. | high |
| #P036 | microbiological | treatment | guidance | Giardia cysts 2-log CT (Free chlorine) | drinking water | treatment_goal | 25 to 99 mg·min/L | Relative CT values for 2 log inactivation at 5-25°C, pH 6-9. | Free chlorine treatment. | high |
| #P037 | microbiological | treatment | guidance | Pseudomonas species UV Dose (4-log) | drinking water | treatment_goal | 3.1 mJ/cm2 | Relative UV dose requirements for 4 log inactivation. | UV disinfection. | high |
| #P038 | microbiological | treatment | guidance | Aeromonas species UV Dose (2-log) | drinking water | treatment_goal | 2.5 to 8 mJ/cm2 | Relative UV dose requirements for 2 log inactivation. | UV disinfection. | high |
| #P039 | microbiological | treatment | guidance | Legionella pneumophila UV Dose (4-log) | drinking water | treatment_goal | 11 to 30 mJ/cm2 | Relative UV dose requirements for 4 log inactivation. | UV disinfection. | high |
| #P040 | microbiological | treatment | guidance | Mycobacterium avium UV Dose (4-log) | drinking water | treatment_goal | 12.3 to 64 mJ/cm2 | Relative UV dose requirements for 4 log inactivation. | UV disinfection. | high |
| #P041 | microbiological | treatment | guidance | Enteric Pathogens UV Dose (4-log) | drinking water | treatment_goal | 5 to 51 mJ/cm2 | Relative UV dose requirements for 4 log inactivation of E. coli, Campylobacter, Helicobacter, Salmonella, and Yersinia. | UV disinfection. | high |
| #P042 | operational | treatment | guidance | CT for 3 log inactivation of biofilm-associated Legionella (Free chlorine) | drinking water | requirement | 36.11 mg·min/L | CT values determined for L. pneumophila Philadelphia-1 serogroup 1 on PVC. | pH = 8, temperature = 21 °C. | high |
| #P043 | operational | treatment | guidance | CT for 4 log inactivation of biofilm-associated Legionella (Free chlorine) | drinking water | requirement | 63.67 mg·min/L | CT values determined for L. pneumophila Philadelphia-1 serogroup 1 on PVC. | pH = 8, temperature = 21 °C. | high |
| #P044 | operational | treatment | guidance | CT for 3 log inactivation of biofilm-associated Legionella (Monochloramine) | drinking water | requirement | 62.80 mg·min/L | CT values determined for L. pneumophila Philadelphia-1 serogroup 1 on PVC. | pH = 8, temperature = 21 °C. | high |
| #P045 | operational | treatment | guidance | CT for 4 log inactivation of biofilm-associated Legionella (Monochloramine) | drinking water | requirement | 108.44 mg·min/L | CT values determined for L. pneumophila Philadelphia-1 serogroup 1 on PVC. | pH = 8, temperature = 21 °C. | high |
| #P046 | operational | treatment | recommended | Thermal shock duration | other | OG | 30 minutes | Stringent thermal shock used as an extreme remediation measure in building systems. | Conducted at 70°C. | high |
| #P047 | microbiological | treatment | guidance | Hepatitis A, Coxsackievirus, Poliovirus, Rotavirus UV Dose (4-log) | drinking water | treatment_goal | 16.4 to 61 mJ/cm2 | Relative UV dose requirements for 4 log inactivation. | UV disinfection. | high |
| #P048 | microbiological | treatment | guidance | Specific Mycobacterium strains UV Dose (2-5 log) | drinking water | treatment_goal | 96 to 192 mJ/cm2 | Relative UV dose requirements for inactivation of some strains of Mycobacterium species. | UV disinfection. | high |
| #P049 | chemical | health | guideline | Total microcystins | recreational water | MAC | 10 µg/L | Guideline value for primary contact recreation. Includes dissolved and intracellular variants and all measurable microcystin variants. | Primary contact recreation. | high |
| #P050 | microbiological | health | guideline | Total cyanobacteria cells | recreational water | requirement | 50000 cells/mL | Indicator of potential cyanotoxin presence for primary contact recreation; excludes picocyanobacteria. | Primary contact recreation. | high |
| #P051 | microbiological | health | guideline | Total cyanobacterial biovolume | recreational water | requirement | 4.5 mm3/L | Indicator of potential cyanotoxin presence for primary contact recreation. | Primary contact recreation. | high |
| #P052 | physical | health | guideline | Total chlorophyll a | recreational water | requirement | 33 µg/L | Indicator of potential cyanotoxin presence for primary contact recreation. | Primary contact recreation when cyanobacteria are dominant. | high |
| #P053 | physical | operational | guidance | Secchi depth threshold (vigilance level) | recreational water | requirement | 1-2 m | Transparency threshold suggested as a vigilance level to trigger further investigations. | high | |
| #P054 | chemical | operational | guidance | Total phosphorus concentration (bloom prevention) | recreational water | requirement | <= 20 µg/L | Concentration threshold below which cyanobacteria blooms are unlikely to develop. | Clear water. | high |
No definitions.