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Document ID ca-gcdwqgtd-2015-04-15-9 Title Guidelines for Canadian Drinking Water Quality: Guideline Technical Document – Toluene, Ethylbenzene and the Xylenes URL https://www.canada.ca/en/health-canada/services/publications/healthy-living/guidelines-canadian-drinking-water-quality-toluene-ethylbenzene-xylenes/guidelines-canadian-drinking-water-quality-guideline-technical-document-toluene-ethylbenzene-xylenes-page-11.html Jurisdiction /ca Subdomain(s) Drinking water, Water quality standards Language en Status completed Analyzed at 2026-03-18 14:12:37.274516+00:00 Relevance Defines Maximum Acceptable Concentrations (MACs) for toluene and ethylbenzene.

Q Qualitative Requirements (0)

No qualitative requirements.

P Quantitative Requirements (13)

Req ID Category Intent Legal Status Name Subdomain(s) Limit Type Limit Value Context Conditions Confidence
#P001chemicalhealthmandatoryToluenedrinking waterMAC0.06 mg/LThe maximum acceptable concentration for toluene is 0.06 milligrams per litre.Calculated by multiplying 0.0097 mg/kg bw per day by 70 kg then by 0.2, divided by 2.13 L-eq/dayhigh
#P002chemicalhealthguidelineEthylbenzenedrinking waterrequirement3 mg/LThe health based value for ethylbenzene is 3 milligrams per litre based upon the cancer risk assessment.high
#P003chemicalhealthmandatoryEthylbenzenedrinking waterMAC0.14 mg/LAs the non-cancer risk assessment resulted in a more conservative HBV for ethylbenzene, the MAC of 0.14 mg/L is deemed to be protective of both cancer and non-cancer health effects.high
#P004chemicalhealthmandatoryXylenesdrinking waterMAC0.09 mg/LThe maximum acceptable concentration for xylenes is 0.09 milligrams per litre.Calculated by multiplying 0.013 mg/kg bw per day by 70 kg then by 0.2, divided by 2.14 L-eq/dayhigh
#P005chemicalhealthmandatoryToluenedrinking waterMAC1.0 mg/LThe U.S. EPA has established a maximum contaminant level (MCL) for toluene in drinking water of 1.0 mg/L (1000 µg/L)U.S. EPA limithigh
#P006chemicalhealthguidelineToluenedrinking waterrequirement0.7 mg/LThe WHO (2004) established a drinking water guideline for toluene of 0.7 mg/L (700 µg/L).WHO limithigh
#P007chemicalhealthguidanceToluenedrinking waterrequirement0.15 mg/LThe California EPA (OEHHA, 1999) developed a non-mandatory public health goal (PHG) of 0.15 mg/L (150 µg/L) for toluene in drinking waterCalifornia EPA limithigh
#P008chemicalhealthmandatoryEthylbenzenedrinking waterMAC0.7 mg/LThe U.S. EPA has established an MCL for ethylbenzene in drinking water of 0.7 mg/L (700 µg/L)U.S. EPA limithigh
#P009chemicalhealthguidelineEthylbenzenedrinking waterrequirement0.3 mg/LThe WHO (2003a) drinking water guideline for ethylbenzene of 0.3 mg/L (300 µg/L)WHO limithigh
#P010chemicalhealthguidanceEthylbenzenedrinking waterrequirement0.3 mg/LThe California EPA (OEHHA, 1997a) established a non-mandatory PHG of 0.3 mg/L (300 µg/L) for ethylbenzene in drinking waterCalifornia EPA limithigh
#P011chemicalhealthmandatoryTotal xylenesdrinking waterMAC10.0 mg/LThe U.S. EPA (1987) established a maximum contaminant level (MCL) for total xylenes in drinking water of 10.0 mg/LU.S. EPA limithigh
#P012chemicalhealthguidelineXylenesdrinking waterrequirement0.5 mg/LThe WHO (2003b) drinking water guideline for xylenes of 0.5 mg/L (500 µg/L)WHO limithigh
#P013chemicalhealthguidanceXylene isomersdrinking waterrequirement1.8 mg/LThe California EPA (OEHHA, 1997b) developed a non-mandatory PHG of 1.8 mg/L for individual xylene isomers or the sum of xylene isomers in drinking waterCalifornia EPA limithigh

D Definitions (0)

No definitions.