What You Need To Know About Minneapolis Drinking Water
Emma Schultz, M.S. | Scientific Contributor
For our assessment of Minneapolis tap water, we aggregated water quality test data from City of Minneapolis Public Works (the municipality that provides drinking water for the City of Minneapolis), the U.S. Environmental Protection Agency (EPA), as well as from samples that we collect and analyze. We cross reference these data with toxicity studies in the scientific and medical literature, and look at upcoming regulatory changes.
Minneapolis Source Water
Minneapolis tap water is drawn from the Mississippi River. In preparing the water for citywide distribution, Minneapolis treats the water by adding corrosion inhibitors, chloramine, fluoride. The water also undergoes particulate removal, softening, and taste/odor control before entering the distribution system.
Chromium 6 In Minneapolis Drinking Water
Chromium 6 (also known as hexavalent chromium) is a highly toxic metal that not currently regulated by the EPA. Minneapolis tap water concentrations in Minneapolis have recently averaged 310 parts per trillion for chromium 6 over a 3 year period. Put in perspective, these levels are roughly 15 times higher than the levels considered to have a negligible impact on cancer risk.
Disinfection Byproducts (DBPs)
Disinfection byproducts (DBPs) are a category of halogenated emerging contaminants that form when chlorine-based disinfectants combine with naturally-occurring organic matter. Although these chemicals are not yet tightly-regulated, the US EPA reports that high levels are associated with an increased risk of bladder cancer, as well as kidney, liver, and central nervous system problems. While Minneapolis’ tap water is in compliance with EPA regulations, Haloacetic Acid (HAA5) concentrations are on the high end (up to 55.4 ppb in the most recent report), and trihalomethanes (THMs) were as high as 33.3 ppb.
While most cities use chlorine as the primary disinfectant, Minneapolis tap water is disinfected with chloramine, which is produced by mixing chlorine and ammonia. Chloramine is typically responsible for what customers often report as the “bad taste” of tap water, and unlike chlorine, does not dissipate if a container of water is left in the fridge overnight. Most one-size-fits-all water filters use filtration media that doesn’t adequately remove chloramine, but the filters that Hydroviv builds for Minneapolis use special filtration media that are purpose-built to remove chloramine as well.
Lead is a toxic heavy metal that can a major negative impact on the development of infants and children. While the city is currently in compliance with federal regulations, EPA and CDC both acknowledge that there is no safe level of lead. In comparison to the rest of the US, citywide lead concentrations in Minneapolis are relatively low, but roughly 10% of the sampled taps are over 1.6 parts ppb. However, the concentrations measured at an individual tap can be much higher, particularly if your home has plumbing that contains lead pipes, fixtures, or valves.
Still Have Questions?
Hydroviv is a water filtration company that uses water quality data to optimize water filters for each city’s water. The chemicals that we list above are what we consider to be “points of emphasis” so we can build the best water filter for Minneapolis tap water, but all of our water filters provide broad protection against other contaminants commonly found in drinking water (e.g. VOCs, lead, solvents, pesticides, mercury).
If you’re interested in learning more about our water filters that have been optimized for Minneapolis tap water, feel free to visit www.hydroviv.com, reach out by email (firstname.lastname@example.org) or through our live chat. We also frequently post water-related news on Twitter or Facebook.The 5 Biggest Complaints About Reverse Osmosis Water Filters
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- Emma Schultz