Collected from Trois Rivieres. Certified ValuesAlkalinity,GranTit’n(asCaCO3).5.02mg/L Nitrate + Nitrite (as N) . 0.070 mg/L Ammonia (as N). 0.030 mg/L K. 0.51 mg/L Ca . 2.52 mg/L Silica (as Si) . 1.98 mg/LCl . 1.74 mg/L Na. 2.21 mg/L Colour(Hazenunits).36