The ability or capacity of the water to resist change in pH; also known as the buffering capacity of the water. The sum of the bicarbonates, carbonates and hydroxides in the water expressed as ppm of calcium carbonate.
The alkalinity of a water a determined by titration with standard acid solution to the methyl orange endpoint (pH approximately 4.5); sometimes abbreviated as "M alkalinity". Total alkalinity includes many alkalinity components, such as hydroxides, carbonates, and bicarbonates.
The ability or capacity of water to resist change in pH; also known as the buffering capacity of water. Measured with a test kit and expressed as ppm.