Brent Coulter
8 December 2010
In 2009, Yahoo! News published a story called “Cities with the Best and Worst Tap Water.” The list was released by Environmental Working Group (EWG), which placed Reno fifth for worst tap water. The unsuspected placement of Reno raised concerns for residents in Washoe County and immediately received attention from local news media. Is Reno’s tap water really that bad? Should locals avoid drinking the tap water for concern of their health?
Firstly, what is the Environmental Working Group? Not to be confused with the Environmental Protection Agency—a federal entity—the EWG is a non-profit organization that focuses on public health and environmental issues, such as water contamination. The organization was founded in 1993 with goals to protect children from health problems related to toxic contaminants and to change federal policies in order to better conserve the environment.
The organization published a drinking water quality report late last December. Water quality tests are mandated by the federal government and are therefore considered public information. Subsequently, EWG obtained these tests results from state agencies then compiled a national drinking water database. Reno appears on a list called “EWG’s Top-Rated and Lowest-Rated Water Utilities,” which ranks municipalities based on their quality of tap water. Out of the 100 cities ranked, one meaning the best quality and 100 meaning the worst quality, Reno appears at spot 96. So by word of EWG, out of 100 U.S. cities, Reno has the fifth worst tap water. But why?
According to their website (www.ewg.org) the reason Reno placed so low on the list is because its tap water contains various contaminants. The detected contaminants that EWG says are of primary concern are arsenic and PCE. According to EWG, arsenic levels in Reno’s water are higher than the national average; however, they do not exceed federal standards set by the EPA. Despite this, EWG claims that the amount of arsenic is still considerably unhealthy.
EWG also reports that PCE contaminates Reno’s water. PCE, formally known as Tetrachloroethylene, is a chemical commonly used in dry cleaning. Again, the levels of the contaminant do not exceed federal standards; however, EWG insists there is a health risk.

Chalk Bluff water treatment facility
To better understand the appearance of these contaminants in Reno’s tap water, one need look no further than Chalk Bluff water treatment facility. Chalk Bluff is the name of a water treatment plant located in West Reno that has been operating since 1994. It is a conventional surface water treatment plant, which means it takes water from the Truckee River and sends it through multiple treatment processes before being distributed as tap water. The plant produces drinking water for the majority of the Reno/Spark area.

associate water quality engineer at Chalk Bluff
Will Raymond is an associate water quality engineer at Chalk Bluff. “A lot of my job entails treatment operations as well as laboratory analysis,” said Raymond, who oversees the process of moving water from the river—through the plant—and to the tap. “We’re blessed with a very clean water source in that we don’t have a whole lot of industry and waste water influence upstream,” said Raymond. The Truckee River is essentially water from Lake Tahoe, a lake known for its purity. So if the water treated at Chalk Bluff comes from a virtually unpolluted water source, how is it that Reno ranks fifth on EWG’s list? What about those contaminants? Well, the answer isn’t simple.
Not all of Reno’s tap water comes from the Truckee River. In fact, there are multiple groundwater sites that play an important role in Reno’s water system. Some of these sites serve as backup reservoirs for times when the Truckee River cannot meet water demand. For example: during the winter, when there is low demand, Chalk Bluff sends treated water to underground reservoirs where it remains until needed. Oftentimes this water is used during droughts. In addition to this, naturally occurring groundwater is sometimes taken from wells. Water that is pumped from the wells travels back to Chalk Bluff where it goes through the same treatment process as the water from the Truckee River.

water quality tests are conducted regularly at Chalk Bluff
However, despite the fact that groundwater is treated by Chalk Bluff before it is distributed as tap water, “EWG went ahead and considered that [the groundwater] is the water that goes into the distribution system. Well that’s not the case; it’s a raw water source. That would be essentially the same thing as taking the water that’s in the river and delivering it to the customers,” said Raymond, who added that some wells are hardly used. More simply put: EWG used test results for water that you don’t drink. This is a flaw in EWG’s data compilation among others, believes Raymond, who also said that EWG entered the same data more than once. Chalk Bluff went through great lengths to present EWG with accurate information and “they said they’d be more than happy to correct inaccurate data.”
Let’s say for one second that the levels of arsenic and PCE that
EWG reported were taken from Reno’s tap water: it still wouldn’t be unhealthy. Chalk Bluff is capable of treating water to nondeductible levels of both contaminants; however, it would be too expensive and unnecessary. Chalk Bluff complies by federal EPA guidelines, which take into consideration both cost benefit and health effects. Even if Reno’s drinking water contained the amounts of arsenic and PCE that the EWG reported, the water would still be within federal health guidelines.
In response to the Environmental Working Group’s report, Chalk Bluff held press releases to demonstrate full compliance with EPA health standards. Chalk Bluff followed up several times with the EWG and sent them additional data; however, the EWG ultimately stopped correspondence and never followed through on revisiting the Ranking. Based on EWG’s lack of action, it is unsure whether or not their list is entirely factual. However, based on federal regulations it is a fact that Reno’s tap water is safe to drink. And in the final words of Will Raymond: “When you look at the environment upstream from us, the water provided by the Tahoe basin is very clean and I think we’re very fortunate to have such a clean water source.”
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For more information on Enironmental Working Group, visit www.ewg.org
For more information on Reno’s drinking water, visit www.tmh2o.com