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Document ID ca-gcdwqgtd-2016-01-12-13 Title Guidelines for Canadian Drinking Water Quality: Guideline Technical Document – Ammonia URL https://www.canada.ca/en/health-canada/services/publications/healthy-living/guidelines-canadian-drinking-water-quality-guideline-technical-document-ammonia/page-15-guidelines-canadian-drinking-water-quality-guideline-technical-document-ammonia.html Jurisdiction /ca Subdomain(s) Drinking water, Analytical methods Language en Status completed Analyzed at 2026-03-17 15:30:44.741803+00:00 Relevance Lists approved analytical methods for ammonia monitoring in drinking water.

14 Qualitative 13 Quantitative 0 Definitions

Q Qualitative Requirements (14)

Req ID	Category	Intent	Legal Status	Name	Subdomain(s)	Context	Conditions	Confidence
#Q001	monitoring	operational	recommended	Use EDTA for Ca2+ and Mn2+ interferences	drinking water	Ca2+, Mn2+ / use EDTA	When using Colorimetry U.S. EPA 350.1 for ammonia-nitrogen determination and Ca2+ or Mn2+ interferences are present.	high
#Q002	monitoring	operational	recommended	Filter sample for elevated turbidity and colour	drinking water	Elevated turbidity and colour / filter sample	When using Colorimetry U.S. EPA 350.1 and elevated turbidity and colour are present.	high
#Q003	monitoring	operational	recommended	Complex with citrate for high Ca2+ and Mn2+	drinking water	High Ca2+, Mn2+ / complex with citrate	When using Colorimetry U.S. EPA 350.1 and high Ca2+ or Mn2+ interferences are present.	high
#Q004	monitoring	operational	recommended	Distil or filter water for turbidity	drinking water	Turbidity / distil or filter water	When using Colorimetry U.S. EPA 350.1 and turbidity is present.	high
#Q005	monitoring	operational	recommended	Filter sample for high turbidity or colour	drinking water	High turbidity or colour / filter sample	When using Colorimetry SM 4500-NH3 G (automated phenate method) and high turbidity or colour are present.	high
#Q006	monitoring	operational	recommended	Add EDTA and sodium tartrate for high Ca2+ and Mn2+	drinking water	High Ca2+, Mn2+ / add EDTA and sodium tartrate	When using Colorimetry SM 4500-NH3 G (automated phenate method) and high Ca2+ or Mn2+ interferences are present.	high
#Q007	monitoring	operational	guidance	Avoid high variability in sample pH	drinking water	Avoid high variability in pH of samples: intensity of colour measured is pH dependent	When conducting ammonia-nitrogen determination using Colorimetry SM 4500-NH3 G (automated phenate method).	high
#Q008	monitoring	operational	recommended	Filter sample for large and fibrous particles	drinking water	Large and fibrous particles / filter sample	When using Colorimetry SM 4500-NH3 H (automated flow injection) and large or fibrous particles are present.	high
#Q009	monitoring	operational	recommended	Distil water for aromatics and amines	drinking water	Aromatics, amines / distil water	When using Colorimetry U.S. EPA 350.2 (nesslerization) and aromatics or amines are present.	high
#Q010	monitoring	operational	recommended	Boil off volatile alkaline compounds at low pH	drinking water	Volatile alkaline compounds / boil off at low pH	When using Colorimetry U.S. EPA 350.2 (nesslerization) and volatile alkaline compounds are present.	high
#Q011	monitoring	operational	recommended	Use dechlorinating agent for Residual Cl2	drinking water	Residual Cl2 / use dechlorinating agent	When residual Cl2 is present. Applies to: Colorimetry U.S. EPA 350.1, Colorimetry U.S. EPA 350.2 (nesslerization), Titrimetry U.S. EPA 350.2, and Titrimetry SM 4500-NH3 C.	high
#Q012	monitoring	operational	mandatory	Sample distillation requirement for Titrimetry	drinking water	Sample distillation is required	When conducting ammonia-nitrogen determination using Titrimetry methods.	high
#Q013	prohibition	operational	mandatory	Prohibition of HgCl2 sample preservation	drinking water	Elevated concentration of dissolved ions, Hg / do not preserve sample with HgCl2	When using Potentiometry ammonia ion-selective electrode methods and an elevated concentration of dissolved ions or Hg is present.	high
#Q014	monitoring	operational	guidance	Use distillation to remove interferences for flow injection analysis	drinking water	Some interferences may be removed by distillation	When using SM 4500-NH3 H (automated flow injection) and interferences are present.	high

P Quantitative Requirements (13)

Req ID	Category	Intent	Legal Status	Name	Subdomain(s)	Limit Type	Limit Value	Context	Conditions	Confidence
#P001	chemical	operational	unknown	Ammonia-nitrogen	drinking water	unknown	0.02-2.0 mg/L as N	Range of application for analytical method	Methodology: Colorimetry, Method ID: U.S. EPA 350.1	high
#P002	chemical	operational	unknown	Ammonia-nitrogen	drinking water	unknown	0.01 mg/L as N	Detection level for analytical method	Methodology: Colorimetry, Method ID: U.S. EPA 350.1	high
#P003	chemical	operational	unknown	Ammonia-nitrogen	drinking water	unknown	< 0.6 mg/L as N	Range of application for analytical method	Methodology: Colorimetry, Method ID: SM 4500-NH3 F (phenate method)	high
#P004	chemical	operational	unknown	Ammonia-nitrogen	drinking water	unknown	0.02-2.0 mg/L as N	Range of application for analytical method	Methodology: Colorimetry, Method ID: SM 4500-NH3 G (automated phenate method)	high
#P005	chemical	operational	unknown	Ammonia-nitrogen	drinking water	unknown	0.002 mg/L as N	Detection level for analytical method	Methodology: Colorimetry, Method ID: SM 4500-NH3 H (automated flow injection)	high
#P006	chemical	operational	unknown	Ammonia-nitrogen	drinking water	unknown	0.05-1.0 mg/L as N	Range of application for analytical method	Methodology: Colorimetry, Method ID: U.S. EPA 350.2 (nesslerization)	high
#P007	chemical	operational	unknown	Ammonia-nitrogen	drinking water	unknown	0.05 mg/L as N	Detection level for analytical method	Methodology: Colorimetry, Method ID: U.S. EPA 350.2 (nesslerization)	high
#P008	chemical	operational	unknown	Ammonia-nitrogen	drinking water	unknown	1.0-25 mg/L as N	Range of application for analytical method	Methodology: Titrimetry, Method ID: U.S. EPA 350.2	high
#P009	chemical	operational	unknown	Ammonia-nitrogen	drinking water	unknown	1.0 mg/L as N	Detection level for analytical method	Methodology: Titrimetry, Method ID: U.S. EPA 350.2	high
#P010	chemical	operational	unknown	Ammonia-nitrogen	drinking water	unknown	5.0-100 mg/L as N	Range of application for analytical method	Methodology: Titrimetry, Method ID: SM 4500-NH3 C	high
#P011	chemical	operational	unknown	Ammonia-nitrogen	drinking water	unknown	0.03-1400 mg/L as N	Range of application for analytical method	Methodology: Potentiometry: ammonia ion-selective electrode, Method ID: U.S. EPA 350.3 / SM 4500-NH3 D	high
#P012	chemical	operational	unknown	Ammonia-nitrogen	drinking water	unknown	0.03 mg/L as N	Detection level for analytical method	Methodology: Potentiometry: ammonia ion-selective electrode, Method ID: U.S. EPA 350.3 / SM 4500-NH3 D	high
#P013	chemical	operational	unknown	Ammonia-nitrogen	drinking water	unknown	> 0.8 mg/L as N	Range of application for analytical method	Methodology: Potentiometry: ammonia ion-selective electrode, Method ID: SM 4500-NH3 E (using known addition)	high

D Definitions (0)

No definitions.