Problems We Found With Denver, Colorado Drinking Water
Analies Dyjak, M.A. | Policy Nerd
Updated July 17, 2019 to include current data
For our 2019 report of Denver water quality, we collected water quality test data from Denver Water and the U.S. Environmental Protection Agency. We cross reference the city’s water quality data with toxicity studies in scientific and medical literature. The water filters that we sell at Hydroviv are optimized to filter out contaminants that are found in Denver’s drinking water.
Where Does Denver Source Its Drinking Water?
Denver Water is the water utility provider for the city of Denver, which services 1.4 million residents. Denver’s drinking water is fully supplied from surface water sources. The South Platte River and its tributaries, the Dillon Reservoir, and the other tributaries above the Fraser River are the primary drinking water sources. Denver Water stores water is several mountain reservoirs, which are then sent to one of three treatment plants before being distributed into homes.
Lead in Denver’s Drinking Water
Lead enters tap water through old lead service pipes and lead-containing plumbing. 10% of taps test for lead in Denver, had concentrations over 11 parts per billion which is just under the EPA federal action level of 15 parts per billion. To make matters worse, houses built after 1986 were most likely built with lead plumbing and lead fixtures. EPA and CDC both recognize that there is no safe level of lead, especially for children.
Chromium 6 in Denver’s Drinking Water
Chromium 6 is a highly toxic metal that is not regulated by the EPA. The city of Denver recently detected levels of Chromium 6 above the California Office of Environmental Health Hazard Assessment public health goal of 20 parts per trillion. The levels of chromium 6 average 37.8 parts per trillion in Denver drinking water. The state of California set their own health advisory level because Chromium 6 is not regulated by the federal government. EPA has acknowledged that Chromium 6 is a known human carcinogen through inhalation, but is still determining its cancer potential through ingestion of drinking water. Lung, nasal and sinus cancers are associated with chromium 6 exposure.
Disinfection Byproducts (DBPs) In Denver’s Drinking Water
Disinfection Byproducts are a category of emerging contaminants which means they have been detected in drinking water, but the risk to human health is unknown. DBPs are formed when chlorine-based disinfectants are routinely added to the water supply to kill bacteria. EPA regulates two different types of DBPs: Total Trihalomethanes (TTHMs) and Haloacetic Acids-5 (HAA5). Regulatory agencies have very little knowledge about the adverse health effects of DBPs, and their toxicity. EPA has however acknowledged their link to an increased risk of bladder cancer, as well as kidney, liver, and central nervous system problems.
Chloramine in Denver’s Tap Water
Denver's drinking water is disinfected with Chloramine, which is being more broadly used over chlorine in water treatment facilities. Chloramine is primarily responsible for what customers report as the “bad taste” of tap water, and unlike chlorine this taste will not fade if 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 Denver use special filtration media that is purpose-built to remove chloramine as well.
It’s important to note that only a handful of contaminants are required to be included in annual Consumer Confidence Reports, and that there are hundreds of potentially harmful unregulated contaminants that aren’t accounted for. If you’re interested in learning more about water filters that have been optimized for Denver’s tap water feel free to visit www.hydroviv.com to talk to a Water Nerd on our live chat feature or send us an email at email@example.com.
Problems We Found In Colorado Springs Drinking Water
Analies Dyjak, M.A. | Hydroviv Research Analyst
Updated July 19, 2019 to include current data
Our Water Nerds have updated our assessment of Colorado Springs drinking water to include the most recent available data. We aggregated data from the Colorado Springs Utilities, the U.S. Environmental Protection Agency (EPA), as well as from samples that we collect and analyze. Our team of Water Nerds then cross-references these data with toxicity studies in scientific literature. The water filters that we sell in Colorado Springs are optimized with this data in mind.
Source Of Colorado Springs Drinking Water
Colorado Springs imports mountain stream-water from Aspen, Leadville, and Brekenridge. Almost 75% of Colorado Springs' water originates from mountain streams. Water from these streams is collected and stored in the Homestake, Fryingpan-Arkansas, Twin Lakes, and Blue River systems. Supplementary surface and groundwater are diverted to Colorado Spring Utility for treatment.
Per and Polyfluoralkyl Substances (PFAS) In Colorado Springs Drinking Water
PFAS are a class of chemicals found various non-stick, stain resistent products, as well as fire fighting foam. PFAS are considered to be "emerging contaminants" because they are not currently regulated by EPA, but are known to be toxic and persistent in the environment. In some wells around Colorado Springs, PFAS levels are more than 20x higher than advisory levels. Hydroviv undersink filters remove PFAS. If you'd like to check out third-party data on our removal rates, send us an email at firstname.lastname@example.org.
Lead In Colorado Springs Drinking Water
Lead enters Colorado Springs consumer's tap water through old lead service pipes and lead-containing plumbing. When corrosion control measures fail (such as what happened in Flint, Michigan), lead leaches into the drinking water and can reach toxic levels. According to data from two sampling periods, the 90th percentile for lead in Colorado Springs was 4.7 parts per billion from January to June, and 3.8 parts per billion from July to December. While Colorado Springs is within the 15 part per billion Action Level, EPA, CDC and American Academy of Pediatrics all recognize that there is no such thing as a safe level of lead for children. In addition, Colorado Springs only sampled just over 100 individual taps to obtain these data.
High Levels of Chromium 6 Levels In Colorado Springs Drinking Water
What is Chromium 6? Chromium 6 (also known as the Erin Brockavich chemical is a highly toxic metal that, while monitored, is not regulated by the EPA. In recent year, Colorado Springs has had very high concentrations of chromium 6 in drinking water. Public heath officials agree that chromium 6 levels above 20 parts per trillion, may have a negligible impact on cancer risk.
Disinfection Byproducts (DBPs) In Colorado Springs Drinking Water
DBPs are a category of emerging contaminants that form when chlorine-based disinfectants react with naturally-occurring organic matter. Although these chemicals are not well regulated, the EPA has concluded that they are associated with an increased risk of bladder cancer, as well as kidney, liver, and central nervous system problems.
Still Have Questions About Colorado Spring’s Tap Water?
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 Colorado Springs tap water, but all of our home water filtration systems provide broad protection against other contaminants commonly found in drinking water.
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