The domestic bottled water market is experiencing a structural illusion in which prices vary depending on the "brand label." Water from the same source, when sold as a private label (retailer brand), becomes an ultra-low-priced product, but when it carries a national brand (manufacturer brand), the price increases by about 1.5 to 2 times. Although the ingredients, water source, and quality are the same, consumers have almost no way to distinguish between them. As the bottled water market operates around brands, critics argue that the actual value of the water itself is being obscured by the label.

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According to the Ministry of Environment and each company on the 17th, many OEM manufacturers for Lotte Chilsung Beverage's Isis, such as Lotus, Baekhak Beverage, and Sancheong Beverage, supply water from the same source to multiple brands. The issue is the price. Even if water from the same source is bottled by the same manufacturer, the price rises when it carries a national brand, and drops to less than half when it is sold as a private label.

In fact, the Homeplus Clear Spring Water no-label product supplied by these OEM companies is priced at 40 KRW per 100ml for a 500ml PET bottle, and Lotte Mart Mineral Water ECO is 38 KRW, while Isis ECO, produced from the same source, is 63.5 KRW, showing a clear difference.

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The background for this price gap lies in the multi-source structure of the domestic bottled water industry. According to the Ministry of Environment, there are 60 bottled water manufacturers in Korea, each producing an average of 5.3 products. On average, a single brand uses about 4.5 different water sources, which means that even under the same brand name, "different water" can be bottled depending on the production time, region, or production line. Since the water source is a key factor in determining the mineral composition and hardness of the water, a change in the source inevitably results in subtle differences in composition and taste.

Among major domestic brands, only three-Samdasoo, Baeksansu, and Hweo Ullim Water-maintain a single water source. Samdasoo from Jeju Development Corporation sources its water from Gyorae-ri, Jocheon-eup, Jeju; Baeksansu, sold by Nongshim, is sourced from Ando County, Jilin Province, China; and Hweo Ullim Water from LG Household & Health Care is sourced from Buk-myeon, Ulleung County, North Gyeongsang Province. These brands maintain relatively consistent composition.

Water bottles displayed at a large supermarket in downtown Seoul. Photo by Yonhap News

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There are concerns that this multi-source structure, combined with market oligopoly, significantly amplifies consumer misconceptions. The domestic bottled water market is an oligopoly, with the top three brands-Samdasoo from Jeju Development Corporation (40%), Isis from Lotte Chilsung Beverage (13%), and Baeksansu from Nongshim (8%)-accounting for over 60% of the market. The stronger the brand, the more consumers perceive "brand equals quality assurance," but in reality, due to the use of multiple sources, it is difficult to guarantee uniformity in quality and composition.

In particular, Isis, which holds the second-largest market share, sources water from four different locations-Sancheong in South Gyeongsang Province, Cheongju in North Chungcheong Province, Sunchang in North Jeolla Province, and Cheongdo in North Gyeongsang Province. The manufacturer and water source vary depending on the distribution channel, product size, and whether it is a private or national brand. Given the offline retail environment where dozens of bottled water products are displayed, it is unrealistic to expect consumers to check the fine details on every label. An industry insider said, "Most consumers choose bottled water based only on the brand name or price level. If the fact that the water source is the same is not actively shared, it is difficult for consumers to make a rational decision."

However, a representative from Lotte Chilsung Beverage explained, "For private label bottled water, there are various reasons for cost reduction, such as securing stable sales channels, streamlining logistics processes, reducing inventory burdens, and not incurring separate branding and marketing expenses. This is the same situation for various private label products."

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Industry insiders point out that, since bottled water has become an essential daily commodity, it is necessary to strengthen disclosure regarding ingredient differences within brands and to ensure transparency in the price structure between national and private brands.

An anonymous source said, "Because the mineral composition and characteristics of water differ depending on the source, there is quality variability, but this is not effectively conveyed to consumers. Even if the source is indicated on the label, it is difficult to say that consumers are given a real choice in the purchasing environment, so the brand name excessively substitutes for information about quality."

They added, "Disclosure of ingredient differences should go beyond being noted in fine print on the label and be provided in a format that allows for clear comparison of the physical and chemical characteristics of water by brand and source. In addition, key price-determining factors such as manufacturer, water source, and distribution margin should also be made public in a way that consumers can understand."