In the case of many of these substances, the critical exposure periods generally appear to be in utero, during early infancy and in some cases, during early childhood and adolescence. [...] While the review of the literature pointed to gaps in scientific evidence that should be addressed, the inclusion of research recommendations regarding this suite of substances was beyond the scope of the current report. [...] If lead levels in drinking water are elevated, the local Medical Officer of Health will assist the facility in determining ways to reduce lead levels and in monitoring the safety of the drinking water (MOE, 2007b). [...] Childproofing for Environmental Health: An Examination of Food Related Exposures 10 households suspected of having lead service lines, bringing greater awareness to the issue of lead in drinking water and to lead service line replacement (both the public and private segments of the line) as the most effective long-term strategy to reduce lead in drinking water. [...] Health Canada states that the re-evaluation program and revisions to the MRLs are applying modern assessment approaches including consideration of exposure risks in sensitive segments of the population, such as infants, children, pregnant women and the elderly; and combined exposure from dietary, residential and drinking water sources.