New Yorkers: What is in our drinking water?

According to the NYC DEP, possible contaminants include microbial contaminants, inorganic contaminants, pesticides, herbicides, organic chemical contaminants, and radioactive contaminants. However, both the NY State Department of Health and the EPA have created strict guidelines that limit the amount of contaminants in the water so the amounts are not harmful.
The NYC DEP created a watershed protection program in order to guarantee that both Catskill/Delaware and Croton water plants and systems are protected against possible contamination which includes water plant upgrades, quality control programs, stream management programs, higher standards for UV protection, and improvements with filtration. According to the DEP, the water is nearly all lead-free and water samples confirm this finding.
NYC DEP's Waterborne Disease Risk Assessment Program has found the common bacteria Giardia and Cryptosporidium in some water samples, but there is no evidence that these bacteria have caused any major illnesses for New Yorkers. The City of NY treats the water with chlorine, fluoride, food grade phosphoric acid, and at times sodium hydroxide in order to meet the Sanitary Code of the city. Some possible pollution points include: rain water contamination, surface and groundwater contamination, and household piping.
According to the DEP EPA, many contaminants, such as sediment, metals, oils, and bacteria, are carried by stormwater into sewers, and finally into drinking water supply reservoirs and systems. If the water isn’t going through a treatment plant, alternative methods of treatment are septic tanks, which are often used for homes and small business.