Parameter Viewer

Document ID ca-cgdrwutuf-2011-01-11-8 Title Canadian Guidelines for Domestic Reclaimed Water for Use in Toilet and Urinal Flushing URL https://www.canada.ca/en/health-canada/services/publications/healthy-living/canadian-guidelines-domestic-reclaimed-water-use-toilet-urinal-flushing/canadian-guidelines-domestic-reclaimed-water-use-toilet-urinal-flushing-page-10.html Jurisdiction /ca Subdomain(s) Water reuse, Wastewater Language en Status completed Analyzed at 2026-03-19 08:28:01.661277+00:00 Relevance Defines health-based targets and risk assessment for domestic water reuse.

0 Qualitative 7 Quantitative 18 Definitions

Q Qualitative Requirements (0)

No qualitative requirements.

P Quantitative Requirements (7)

Req ID	Category	Intent	Legal Status	Name	Subdomain(s)	Limit Type	Limit Value	Context	Conditions	Confidence
#P001	microbiological	health	guideline	Disability-adjusted life year (DALY) target	drinking water, wastewater, other	treatment_goal	10^-6 DALY	Reference level of risk adopted as an acceptable level of risk from microbiological contaminants in drinking water and used to calculate treatment goals for reclaimed water.	Per year	high
#P002	microbiological	treatment	guideline	C. parvum required log reduction (aerosols)	wastewater, other	treatment_goal	2.6 log	Required log reductions to achieve a health target of 10-6 DALY per year in treated reclaimed water.	Based on aerosols from toilet flushing	high
#P003	microbiological	treatment	guideline	C. parvum required log reduction (cross-connection)	wastewater, other	treatment_goal	4.1 log	Required log reductions to achieve a health target of 10-6 DALY per year in treated reclaimed water.	Based on cross-connection (worst-case assumption of 1 person per 1000 consuming 1 L/day for 365 days)	high
#P004	microbiological	treatment	guideline	Rotavirus required log reduction (aerosols)	wastewater, other	treatment_goal	4.2 log	Required log reductions to achieve a health target of 10-6 DALY per year in treated reclaimed water.	Based on aerosols from toilet flushing	high
#P005	microbiological	treatment	guideline	Rotavirus required log reduction (cross-connection)	wastewater, other	treatment_goal	5.7 log	Required log reductions to achieve a health target of 10-6 DALY per year in treated reclaimed water.	Based on cross-connection (worst-case assumption of 1 person per 1000 consuming 1 L/day for 365 days)	high
#P006	microbiological	treatment	guideline	E. coli O157:H7 required log reduction (aerosols)	wastewater, other	treatment_goal	5.3 log	Required log reductions to achieve a health target of 10-6 DALY per year in treated reclaimed water.	Based on aerosols from toilet flushing	high
#P007	microbiological	treatment	guideline	E. coli O157:H7 required log reduction (cross-connection)	wastewater, other	treatment_goal	6.8 log	Required log reductions to achieve a health target of 10-6 DALY per year in treated reclaimed water.	Based on cross-connection (worst-case assumption of 1 person per 1000 consuming 1 L/day for 365 days)	high

D Definitions (18)

Req ID	Category	Name	Context	Confidence
#D001		WHO	World Health Organization	high
#D002		DALY	disability-adjusted life year	high
#D003		Health-based targets	the "goal-posts" or "benchmarks" that have to be met to ensure the safe use of recycled water.	high
#D004		guideline value	the concentration or measure of a water quality characteristic that, based on present knowledge, does not pose any significant risk to the health of the consumer over a lifetime of consumption.	high
#D005		Performance targets	describe the reduction in risk to be provided by measures such as treatment processes (aimed at reducing hazards) and on-site controls (aimed at reducing both hazards and exposure).	high
#D006		N50	median infective dose	high
#D007		P	probability of infection	high
#D008		dalyd	Doses equivalent to 10−6 DALY	high
#D009		a	parameters describing probability of infection	high
#D010		r	parameters describing probability of infection	high
#D011		d	dose	high
#D012		L	volume, in litres	high
#D013		N	number of times the exposure occurs in one year	high
#D014		Susceptibility fraction	The proportion of the population susceptible to developing disease following infection.	high
#D015		U.S. EPA	U.S. Environmental Protection Agency	high
#D016		deterministic approach	uses single estimates for exposure volumes and number of exposure events (e.g., point estimates), which has the disadvantage of neglecting to address variability and uncertainty	high
#D017		Pinf	Risk of infection (probability of infection per event)	high
#D018		Pill	Risk of illness per event	high