| #P001 | chemical | health | guideline | Toluene | drinking water | MAC | 0.06 mg/L | The MAC for toluene in drinking water has been determined to be 0.06 mg/L (60 µg/L), based on several neurological endpoints reported in human occupational studies. | | high |
| #P002 | chemical | health | guideline | Toluene | drinking water | MAC | 60 µg/L | The MAC for toluene in drinking water has been determined to be 0.06 mg/L (60 µg/L), based on several neurological endpoints reported in human occupational studies. | | high |
| #P003 | chemical | aesthetic | guidance | Toluene (odour threshold) | drinking water | unknown | 0.024 mg/L | The lowest reported odour threshold for toluene is 0.024 mg/L (24 µg/L); this is close to the MAC, indicating that toluene may not be detected by smell at the MAC. | | medium |
| #P004 | chemical | aesthetic | guidance | Toluene (odour threshold) | drinking water | unknown | 24 µg/L | The lowest reported odour threshold for toluene is 0.024 mg/L (24 µg/L); this is close to the MAC, indicating that toluene may not be detected by smell at the MAC. | | medium |
| #P005 | chemical | health | guideline | Ethylbenzene | drinking water | MAC | 0.14 mg/L | A MAC of 0.14 mg/L (140 µg/L) for ethylbenzene in drinking water has been determined based on kidney effects and body weight reduction in rats and on liver and pituitary gland effects in mice; this MAC is protective of both cancer and non-cancer endpoints. | | high |
| #P006 | chemical | health | guideline | Ethylbenzene | drinking water | MAC | 140 µg/L | A MAC of 0.14 mg/L (140 µg/L) for ethylbenzene in drinking water has been determined based on kidney effects and body weight reduction in rats and on liver and pituitary gland effects in mice; this MAC is protective of both cancer and non-cancer endpoints. | | high |
| #P007 | chemical | aesthetic | guidance | Ethylbenzene (odour threshold) | drinking water | unknown | 0.0016 mg/L | The lowest reported odour threshold for ethylbenzene is 0.0016 mg/L (1.6 µg/L); this is much lower than the MAC, indicating that drinking water containing ethylbenzene will become unpalatable at a concentration much lower than that which may cause adverse health impacts. | | medium |
| #P008 | chemical | aesthetic | guidance | Ethylbenzene (odour threshold) | drinking water | unknown | 1.6 µg/L | The lowest reported odour threshold for ethylbenzene is 0.0016 mg/L (1.6 µg/L); this is much lower than the MAC, indicating that drinking water containing ethylbenzene will become unpalatable at a concentration much lower than that which may cause adverse health impacts. | | medium |
| #P009 | chemical | health | guideline | Xylenes | drinking water | MAC | 0.09 mg/L | A MAC of 0.09 mg/L (90 µg/L) for xylenes in drinking water has been determined based on neuromuscular effects in rats. | | high |
| #P010 | chemical | health | guideline | Xylenes | drinking water | MAC | 90 µg/L | A MAC of 0.09 mg/L (90 µg/L) for xylenes in drinking water has been determined based on neuromuscular effects in rats. | | high |
| #P011 | chemical | aesthetic | guidance | Xylenes (odour threshold) | drinking water | unknown | 0.02 mg/L | The lowest reported odour threshold for xylenes is 0.02 mg/L (20 µg/L); this is close to the MAC, indicating that xylenes may not be detected by smell at the MAC. | | medium |
| #P012 | chemical | aesthetic | guidance | Xylenes (odour threshold) | drinking water | unknown | 20 µg/L | The lowest reported odour threshold for xylenes is 0.02 mg/L (20 µg/L); this is close to the MAC, indicating that xylenes may not be detected by smell at the MAC. | | medium |