Where is the Legionella bacterium found?

Where is the Legionella bacterium found? Legionella organisms can be found in many types of water systems. However, the bacteria reproduce to high numbers in warm, stagnant water (90°-105° F), such as that found in certain plumbing systems and hot water tanks, cooling towers and evaporative condensers of large air-conditioning systems, and whirlpool spas. Cases …

What is Hardness of Water?

Hardness – hardness is defined as the sum of the calcium (Ca) and magnesium (Mg) concentrations, both expressed as calcium carbonate in milligrams per liter (mg/L). Often water treatment technicians express hardness with units of grains per gallon. 1grain (gr) per gallon (gal) = 17.1 mg/L = 17.1 ppm. Conversely, 1 mg/L = 0.0585 gr/gal. …

Well Water Testing

Overview The U.S. Environmental Protection Agency’s (EPA) rules that protect public drinking water systems do not apply to individual water systems, such as privately owned wells. Therefore, as an individual water system owner, it is up to you to make sure that your water is safe to drink. What to test for in your well? …

National Primary Drinking Water Regulations – Public Water Systems

National Primary Drinking Water Regulations (NPDWRs or primary standards) are legally enforceable standards that apply to public water systems. Primary standards protect public health by limiting the levels of contaminants in drinking water. List of Contaminants & their MCLs – Maximum Content Level Contaminant MCLG1 (mg/L)2 MCL or TT1 (mg/L)2 Potential Health Effects from Ingestion …

Interpretation of Coliform Lab Results

There are a variety of bacteria, parasites and viruses that cause health problems when humans ingest them in drinking water. Testing water for each of these germs is difficult and expensive. Instead, water quality and public health workers measure coliform levels. The presence of coliforms in drinking water suggests there may be disease-causing agents in …

Method for Collecting Drinking Water Samples For Bacteriological Analysis

This method is for collecting potable (drinking) water samples. Only samples collected in bottles prepared by American Environmental Laboratories and collected in accordance with these instructions will be accepted for analysis. DO NOT OPEN BOTTLES UNTIL ALL INSTRUCTIONS HAVE BEEN READ! The sample should be taken from a smooth-nosed cold-water tap if possible. Avoid collecting …

Well Water Testing

For FHA mortgage insurance, the following procedures are required prior to accepting a house with an individual well: Well water must be tested in accordance with the latest local and State drinking water regulation for private wells. This includes all microbiological and chemical test parameters in the regulation. If there are no local or adequate …