
Photo: Martin Riese/Facebook

Photo: Martin Riese/Facebook
The work of a water sommelier is very similar that of a wine sommelier. They also chill the water to a certain temperature – in this case 59 degrees Fahrenheit is perfect – and offer clients a selection of different waters, while presenting them with all kinds of interesting information about them. Apart from its place of origin, he always focuses on the TDS (Total Dissolved Solids) level of the water. This is basically the mineral content, which can reach from very low (10 – 40) to very high (around 7000). The higher the TDS level of the water, the stronger its taste. For example, VOSS is a Norwegian mineral water made from glacier water, which is very pure. It has a TDS level of only 40, about the same as most purified waters, so it’s very hard to identify its flavor profile until you’ve had a higher TDS water to compare it with. On the other hand, Iskilde, a mineral water from an artesian spring in a conservation area in Denmark, has a TDS level of 400, and has an earthy taste to it, when compared to VOSS. Having passed through 150 feet of alternating layers of quartz sand and clay, as well as an underground air-bubble full of 8,000-year-old oxygen, Iskilde has a very unique blend of minerals.
Photo: Martin Riese/Facebook
ROI, a special spring water from the Rogaška Spa and Health center in Slovenia, is on the extreme side of the TDS spectrum. It has a TDS level of 7,400, which Martin calls “insane”. He only has 10 bottle of it in his restaurant and uses it exclusively for tastings. It has the highest magnesium content of any natural water in the world, and has long been used as medication. In fact, the company that bottles it explicitly states that ROI is a health product and not intended to simply quench thirst. It has a strong, off-putting metallic taste, but it’s great after an alcohol-fueled night on the town. Its high mineral content quickly replenishes the nutrients lost while drinking, alleviating the symptoms of hangover. These are just 3 of the 44 different natural waters that Martin Riese has on his water menu at Ray’s & Stark’s restaurant, and he can’t wait to tell you all about them while you take a sip. So if you’re interested in sampling some of the best still and sparkling waters on Earth and learning which one best compliments your favorite dishes, now you know who to ask.
And just in case you’re wondering about his experience in the water department, Martin says that he has so far tried over 4,000 different spring waters from all over the world. He drinks water professionally since 2005.
Sources: Business Insider, Quartz, Martin Riese