regAssist Monitor — Parameters

Req ID	Category	Intent	Legal Status	Name	Subdomain(s)	Limit Type	Limit Value	Context	Conditions	Confidence
#P001	microbiological	operational	mandatory	Total coliforms	drinking water	MAC	0 per 100 mL	in water leaving a treatment plant and in non-disinfected groundwater leaving the well	none detectable per 100 mL	high
#P002	microbiological	treatment	recommended	Enteric viruses	drinking water	treatment_goal	>= 4 log	removal and/or inactivation of enteric viruses	treatment technologies should be in place to achieve a minimum 4 log (99.99%) removal and/or inactivation	high
#P003	microbiological	treatment	recommended	Enteric protozoa	drinking water	treatment_goal	>= 3 log	removal and/or inactivation of enteric protozoa	minimum 3 log (99.9%) removal and/or inactivation	high
#P004	operational	operational	recommended	Sample collection volume	drinking water	requirement	>= 100 mL	A minimum volume of 100 mL of water should be examined to obtain a reliable estimate of the number of organisms	using MTF or MF, or P-A result at expected low levels	high
#P005	operational	operational	recommended	Sampling frequency (Up to 5000 population)	drinking water	requirement	4 samples per month	Recommended sampling frequency for population served up to 5000	The water samples should be taken at regular intervals throughout the month	high
#P006	design	treatment	guidance	UV Dose (NSF/ANSI Standard 55 Class A)	drinking water	requirement	>= 40 mJ/cm2	UV systems certified to NSF/ANSI Standard 55 Class A	designed to deliver a UV dose at least equivalent to 40 mJ/cm2 in order to inactivate microorganisms	high
#P007	microbiological	treatment	guidance	Bacteria and bacterial spores reduction (Distillation)	drinking water	treatment_goal	>= 6 log	NSF standard 62 for Drinking Water Distillation Systems	distillation system must provide a minimum 6 log reduction	high
#P008	operational	operational	recommended	Sampling frequency (5,000 to 90,000 population)	drinking water	requirement	1 per 1000 persons per month	Recommended minimum sampling frequency based on population served	Samples should be taken at regular intervals throughout the month	high
#P009	operational	operational	recommended	Sampling frequency (90,000+ population)	drinking water	requirement	90 + (1 per 10 000 persons) samples per month	Recommended minimum sampling frequency for large populations	Samples should be taken at regular intervals throughout the month	high
#P010	chemical	operational	guidance	Chlorine residual for HPC control	drinking water	OG	0.2 mg/L	Maintenance of disinfectant residual to control heterotrophic plate count (HPC)	applicable to most water supplies to keep HPC below 500 CFU/mL	high
#P011	operational	operational	mandatory	Sample transport temperature	drinking water	requirement	5 ± 3 °C	Transportation of bacteriological samples to the laboratory	transported in a cooler with ice or cooling packs; protected from direct contact to prevent freezing	high
#P012	operational	operational	recommended	Sample holding time	drinking water	requirement	<= 24 hours	Interval between collection and beginning of examination	8 hours is preferred; up to 48 hours may be acceptable in remote areas	high
#P013	microbiological	operational	recommended	Distribution system total coliform detection threshold	drinking water	requirement	<= 10 % of samples	Investigation trigger for coliform detections in municipal-scale distribution systems	detections in more than 10% of samples in a given period should be investigated	high
#P014	operational	treatment	recommended	Disinfectant residual monitoring frequency (treatment plant)	drinking water	requirement	1 daily	Water leaving a treatment plant	As part of the verification process in a source-to-tap multi-barrier approach	high
#P015	operational	treatment	recommended	Turbidity monitoring frequency (treatment plant)	drinking water	requirement	1 daily	Water leaving a treatment plant	As part of the verification process in a source-to-tap multi-barrier approach	high
#P016	microbiological	operational	recommended	Total coliform monitoring frequency (treatment plant)	drinking water	requirement	>= 1 weekly	Water leaving a treatment plant	As part of the verification process in a source-to-tap multi-barrier approach	high
#P017	microbiological	operational	guidance	HPC interference threshold (Membrane Filter)	drinking water	requirement	> 500 CFU/mL	Recovery of total coliforms using the MF technique	Greatest reduction in recovery occurs when heterotrophic plate count exceeds this level	high
#P018	microbiological	operational	guidance	HPC interference threshold (Multiple Tube Fermentation)	drinking water	requirement	> 250 CFU/mL	Recovery of total coliforms by MTF	Greatest reduction in recovery occurs when HPC densities exceed this level	high
#P019	chemical	treatment	guidance	Free chlorine CT for 99% virus inactivation	drinking water	treatment_goal	4.0 mg·min/L	Disinfection efficacy for viruses at 5°C	Value for pH 6.0-9.0	high
#P020	design	treatment	guidance	UV dose for 4-log Adenovirus inactivation	drinking water	treatment_goal	167-186 mJ/cm2	UV light dose for inactivation of resistant viruses	To achieve 4-log reduction	high
#P021	operational	operational	recommended	Groundwater sanitary status sampling frequency	drinking water	requirement	>= 10 samples	Assessing groundwater vulnerability to contamination	Sampling needed to determine the sanitary status of a groundwater source	high
#P022	chemical	treatment	guidance	Ozone CT for 99% Giardia lamblia inactivation	drinking water	treatment_goal	1.3 mg·min/L	Disinfection efficacy at 5°C	pH 6-7	high
#P023	chemical	treatment	guidance	Ozone CT for 99% virus inactivation	drinking water	treatment_goal	0.6 mg·min/L	Disinfection efficacy at 5°C	pH 6-7	high
#P024	physical	treatment	guidance	UV dose for 4-log Cryptosporidium inactivation	drinking water	treatment_goal	22 mJ/cm2	UV light disinfection performance	To achieve 4-log reduction	high
#P025	physical	treatment	guidance	UV dose for 4-log Giardia inactivation	drinking water	treatment_goal	22 mJ/cm2	UV light disinfection performance	To achieve 4-log reduction	high
#P026	chemical	treatment	guidance	Free chlorine CT for 99% Giardia lamblia inactivation	drinking water	treatment_goal	65-93 mg·min/L	Disinfection efficacy at 5°C	pH 6-7	high
#P027	chemical	treatment	guidance	Chloramines CT for 99% E. coli inactivation	drinking water	treatment_goal	95-180 mg·min/L	Disinfection efficacy at 5°C	pH 8-9	high
#P028	chemical	treatment	guidance	Chloramines CT for 99% Giardia lamblia inactivation	drinking water	treatment_goal	1470 mg·min/L	Disinfection efficacy at 5°C	pH 8-9	high
#P029	chemical	treatment	guidance	Chloramines CT for 99% virus inactivation	drinking water	treatment_goal	857 mg·min/L	Disinfection efficacy at 5°C	pH 8-9	high
#P030	chemical	treatment	guidance	Chlorine dioxide CT for 99% Giardia lamblia inactivation	drinking water	treatment_goal	17 mg·min/L	Disinfection efficacy at 5°C	pH 6-7; value for pH 6.0-9.0	high
#P031	chemical	treatment	guidance	Chlorine dioxide CT for 99% virus inactivation	drinking water	treatment_goal	5.6 mg·min/L	Disinfection efficacy at 5°C	pH 6-7; value for pH 6.0-9.0	high
#P032	chemical	treatment	guidance	Ozone CT for 99% E. coli inactivation	drinking water	treatment_goal	0.02 mg·min/L	Disinfection efficacy at 5°C	pH 6-7	high
#P033	microbiological	treatment	guidance	UV dose for 4-log E. coli inactivation	drinking water	treatment_goal	5.0-18 mJ/cm2	UV light disinfection performance	To achieve 4-log reduction	high
#P034	microbiological	treatment	guidance	UV dose for 4-log Rotavirus inactivation	drinking water	treatment_goal	36-40 mJ/cm2	UV light disinfection performance	To achieve 4-log reduction	high
#P035	physical	treatment	guidance	Bacterial removal credit (Coagulation/Sedimentation)	drinking water	treatment_goal	1.7 log	Physical removal of coliform bacteria	Range 0.5 to 3.9 log reduction associated with coagulation, flocculation, and sedimentation	high
#P036	physical	treatment	guidance	Bacterial removal credit (Slow sand filtration)	drinking water	treatment_goal	2.4 log	Physical removal of coliform bacteria	Range 1.3 to 3.2 log reduction reported for slow sand filtration	high
#P037	physical	treatment	guidance	Bacterial removal credit (Membrane filtration)	drinking water	treatment_goal	4.0 to > 6.0 log	Physical removal of E. coli	Membrane filtration technologies are capable of removing 4.0 log to greater than 6.0 log of E. coli	high
#P038	chemical	treatment	guidance	Free chlorine CT for 99% E. coli inactivation	drinking water	treatment_goal	0.034-0.05 mg·min/L	Disinfection efficacy at 5°C	pH 6-7	high
#P039	chemical	treatment	guidance	Chlorine dioxide CT for 99% E. coli inactivation	drinking water	treatment_goal	0.4-0.75 mg·min/L	Disinfection efficacy at 5°C	pH 6-7	high

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