CORRELATIONS BETWEEN CALCIUM, MAGNESIUM AND HARDNESS OF WATER IN THE DRINKING WATERS OF DECATUR COUNTY GEORGIA AND THE INCIDENCE OF CARDIOVASCULAR AND CEREBROVASCULAR DISEASES
Abiodun A. Ojo* and Manju Sharma
*Atlanta Metropolitan College, Division of Science, Mathematics & Health Professions, 1630 Metropolitan Parkway, SW, Atlanta, GA 30310
In this study, we are presenting some link between water hardness, calcium and magnesium levels, cardiovascular diseases and cerebrovascular disease (CVD and CBVD) in Decatur County of Georgia, USA. The drinking water samples from different regions and sources were analyzed by using the ethylenediaaminetetraacetic acid (EDTA) – metal complexation method. In the study we found that the surface water sources (lakes, ponds and river water) contained low concentrations of water hardness ranging from 3.66mg/l to 33.05mg/L and calcium and magnesium ranged from 3.15-30.15mg/L and 0.38- 2.90mg/L respectively. The municipal drinking waters showed hardness; 37.23mg/L to 44.25 mgA-, calcium; and 3.06 mg/L to 4.45mg/L, magnesium. The drinking waters obtained outside the municipal city limits mainly from boreholes (well ground waters) showed geographic variations ranging from 43.69mg/L to 68.06mg/L for hardness of water; and for calcium and magnesium ranging from 37.40 mg/L to 58.05mg/L and 2.00mg/L to 21.77mg/L, respectively. The mortality rate caused by CVD is lower outside the municipal city limits compared to within the Bainbridge city limit. The ratio of high calcium and low magnesium appears to be responsible for an inverse correlation between the calcium and magnesium concentrations to CBVD mortality rate in Decatur County. A positive correlation between the levels of magnesium and CBVD was observed. This study has raised question concerning the involvement of magnesium levels in drinking water with CBVD and its supposed beneficial effects against CVD.