I don&#x27;t know the article, but there are many sources for the individual claims, e.g.:<p>* Denver is at 5,130–5,690 ft (1,564–1,731 m) [0]<p>* The boiling point of water at this altitude is between 201 and 203 °F; at sea level it is 212 °F [1]<p>* &quot;Your brewer should maintain a water temperature between 195 to 205 degrees Fahrenheit for optimal extraction.  Colder water will result in flat, under-extracted coffee, while water that is too hot will also cause a loss of quality in the taste of the coffee.&quot; [2]<p>[0]: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Denver" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Denver</a><p>[1]: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;High-altitude_cooking#Boiling_point_of_pure_water_at_elevated_altitudes" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;High-altitude_cooking#Boiling_...</a><p>[2]: <a href="http:&#x2F;&#x2F;www.ncausa.org&#x2F;About-Coffee&#x2F;How-to-Brew-Coffee" rel="nofollow">http:&#x2F;&#x2F;www.ncausa.org&#x2F;About-Coffee&#x2F;How-to-Brew-Coffee</a>