Best Water For Your Keurig Coffee Maker

Quick Answer

• Filtered water is generally the best choice for your Keurig coffee maker.
• Tap water can contain minerals that build up and affect taste and machine performance.
• Distilled or demineralized water can strip flavor from your coffee and may not be ideal for all machines.
• Using the right water can improve coffee taste and extend the lifespan of your Keurig.
• Regularly descaling your Keurig is still important, regardless of the water you use.

Key Terms and Definitions

• Filtered Water: Water that has passed through a filter to remove impurities like sediment, chlorine, and some minerals.
• Tap Water: Water directly from your municipal water supply.
• Mineral Buildup (Scale): Deposits left behind by hard water, primarily calcium and magnesium, which can clog internal components.
• Descaling: The process of removing mineral buildup from your coffee maker’s internal parts using a descaling solution or vinegar.
• Distilled Water: Water that has been boiled into vapor and then condensed back into liquid, removing most minerals and impurities.
• Demineralized Water: Water that has had its mineral ions removed, often through ion exchange or distillation.
• TDS (Total Dissolved Solids): A measure of the combined content of all inorganic and organic substances contained in a liquid.
• Acidity: A flavor component in coffee that contributes to its brightness and tanginess.
• Bitterness: A flavor component in coffee that can be desirable in moderation but unpleasant when excessive.
• Odor: The smell of water, which can significantly impact the aroma and taste of brewed coffee.

How It Works: Keurig Brewing and Water

• Your Keurig coffee maker heats water to an optimal brewing temperature, typically between 190°F and 200°F.
• The heated water is then forced under pressure through a K-Cup pod filled with coffee grounds.
• This process extracts the soluble compounds from the coffee grounds, creating your beverage.
• The water reservoir holds the water that will be heated and used for brewing.
• Internal heating elements and pumps are responsible for moving and heating the water.
• Mineral content in the water can leave deposits on these internal components over time.
• These deposits, known as scale, can impede water flow and reduce heating efficiency.
• Scale buildup can also alter the taste of your coffee by affecting extraction.
• The type of water used directly influences the purity and mineral content that interacts with your coffee grounds and the machine’s components.

What Affects the Result: Water and Your Keurig

• Mineral Content: Tap water, especially “hard” water, contains dissolved minerals like calcium and magnesium. These minerals can lead to scale buildup in your Keurig, affecting its performance and the taste of your coffee.
• Chlorine: Many municipal water supplies add chlorine for disinfection. Chlorine can impart an unpleasant chemical taste and odor to your coffee, masking the coffee’s natural flavors.
• pH Level: The pH of your water can influence coffee extraction. Water that is too acidic or too alkaline might not extract the optimal flavor compounds from the coffee grounds.
• Filtration: Using filtered water removes many impurities, including chlorine and some minerals, leading to a cleaner taste and potentially reducing scale buildup.
• Distilled/Demineralized Water: While these waters are pure, they lack the minerals that can contribute to coffee’s body and flavor profile. They can also potentially lead to corrosion in some brewing systems over time.
• Water Temperature: While your Keurig controls this, the presence of scale can affect its ability to reach and maintain the ideal brewing temperature (typically 190-200°F), impacting extraction.
• Coffee Freshness: The freshness of the coffee grounds in your K-Cup is crucial. Even with perfect water, stale coffee will not produce a great cup.
• Grind Size (for non-K-Cup brewing): If you use a reusable K-Cup filter, the grind size of your coffee matters. A grind that’s too fine can clog the filter, and one that’s too coarse can lead to under-extraction.
• Coffee-to-Water Ratio: For reusable filters, the amount of coffee grounds you use relative to the water will affect the strength and flavor.
• Brewing Time: The duration the water is in contact with the coffee grounds is a key extraction factor. Keurig machines are designed for a specific brew time.
• Water Odor: Any unpleasant odors in your water, such as from sulfur or stagnant sources, will transfer directly to your coffee.
• Water Hardness: Hard water has a high mineral content, leading to more significant scale buildup and potentially a duller coffee flavor.

Using filtered water removes many impurities, including chlorine and some minerals, leading to a cleaner taste and potentially reducing scale buildup. Consider investing in a good set of water filter cartridges for your Keurig.

PUREPLUS 5 Micron 10" x 4.5" Whole House Sediment and Carbon Water Filter Replacement Cartridge for GE FXHTC, GXWH40L, GXWH35F, GNWH38S, Culligan RFC-BBSA, WRC25HD, PP10BB-CC, Pentek RFC-BB, 2Pack

• ❄️ Recognized Certification - Food Grade Material Meets European EC1935-2004 Regulations, Australia Water Mark, REACH, BPA FREE Certified. The filter reduces up to 99% of Chlorine, sand, rust, sediment, color. This kind of filter is recommended for tap water filtration. ❄️If your water source is well water, this filter may not achieve the filtering effect you expect. Check out our another product. Search “B01N9024NF” for well water filtration.
• ❄️ Multi-Layer Density Tech - The whole house water filter is designed with density three PP layers and Coconut Shell Activated Carbon Layer to remove most contaminants and deliver great fresh water. The multi-layer density tech can capture impurities targetedly and have 30% longer service life than the other common type.
• ❄️ High Capacity - The filter can filter up to 30000 gallons depending on water quality. Suggest to replace it every 3- 6 months for the average household for optimal performance depending on the use. Let it bring a wonderful cleaner water experience to your loved ones.
• ❄️ Compatible Models - PUREPLUS whole house carbon water filter is premium replacement for any standard 10inch X 4.5inch pre-filtration filter models including GXWH35F, WRC25HD, GXWH40L, GXWH30C, GXWH38F, GNQH38S, GE FXHTC WRC25HD,WHKF-WHPCBB, RFC-BB and RFC-BB, WFHD13001, 4WH-HDGR-F01. The ge whole house water filter is compatible with any standard 10" x 4.5" heavy duty filter housing and most systems with 9.75" x 4.5" filters.
• ❄️ Why PUREPLUS - PUREPLUS has 20 years of expertise and 200 patents in the water filtration industry. Every year it provides filtration solutions to more than 200 million American households, our filters use advanced filtration technology to ensure high quality water. Trust us, make PUREPLUS your solution.

Buy on Amazon

Pros, Cons, and When It Matters

• Filtered Water:
• Pros: Removes chlorine for better taste and odor, reduces mineral buildup, generally safe for most machines.
• Cons: Requires a filter (initial cost and replacement), may still contain some minerals beneficial for flavor.
• When It Matters: For daily use when you want a consistently good-tasting cup and to protect your machine from excessive scale.
• Tap Water:
• Pros: Convenient, readily available, no extra cost.
• Cons: Can contain chlorine, minerals, and other impurities that affect taste and can cause scale buildup.
• When It Matters: If your tap water is known to be very clean and low in minerals, and you don’t mind the potential for more frequent descaling.
• Bottled Spring Water:
• Pros: Typically good taste, controlled mineral content.
• Cons: Costly for daily brewing, plastic waste.
• When It Matters: As a premium option for taste if you find filtered tap water still lacking, or for occasional use.
• Distilled Water:
• Pros: Very pure, no minerals to cause scale.
• Cons: Can lead to flat, lifeless coffee; potential long-term effects on machine components are debated.
• When It Matters: In areas with extremely hard water where scale is a major concern, but use with caution and consider a blend.
• Demineralized Water:
• Pros: No minerals means no scale buildup.
• Cons: Strips coffee of flavor and body, similar concerns to distilled water regarding taste and machine longevity.
• When It Matters: Primarily for industrial or specific water treatment applications, not generally recommended for home coffee brewing.
• Reverse Osmosis (RO) Water:
• Pros: Removes a wide range of impurities and minerals.
• Cons: Can remove beneficial minerals that contribute to coffee flavor; often results in a flat taste.
• When It Matters: If you have an RO system and are looking for pure water, but consider remineralizing for better coffee taste.
• K-Cup Pod Quality:
• Pros: Convenience and variety.
• Cons: Coffee freshness and quality can vary significantly.
• When It Matters: The primary factor for taste if you are using pre-packaged pods.
• Reusable K-Cup Filters:
• Pros: Cost savings, allows use of your own coffee, reduces waste.
• Cons: Requires grinding your own beans, more effort in brewing and cleaning.
• When It Matters: For those who prefer specific coffee beans or want to reduce environmental impact.

Common Misconceptions

• “All tap water is bad for Keurigs.” Not necessarily. If your local tap water is soft and tastes good, it might be fine, but it still carries a higher risk of scale than filtered water.
• “Distilled water is the best because it’s pure.” Pure water lacks the minerals that contribute to coffee’s flavor and body, often resulting in a duller cup.
• “You don’t need to descale if you use filtered water.” Filtration reduces scale, but it doesn’t eliminate it entirely. Regular descaling is still recommended by most manufacturers.
• “Bottled water is always better than filtered tap water.” Not always. High-quality filtered tap water can often rival or surpass the taste of many bottled waters.
• “Keurigs are designed to work with any water.” While they are designed to be robust, the quality of water significantly impacts both taste and the longevity of internal components.
• “Any filter will do the job.” Different filters target different contaminants. For coffee, a filter that reduces chlorine and some minerals is ideal.
• “Demineralized water is the same as distilled water.” Both have minerals removed, but the processes differ, and the resulting taste impact on coffee can be similar.
• “Using hot water in the reservoir is faster.” Keurigs are designed to heat cold water efficiently. Using hot water may not save significant time and could potentially affect the heating element.
• “You can use any liquid in a Keurig.” Never. Only water should be used. Other liquids can damage the machine and are not safe for consumption.
• “The K-Cup pod itself is the only thing that affects taste.” Water quality is a major, often overlooked, component that significantly influences the final flavor.

FAQ

• What kind of water does Keurig recommend?

Keurig generally recommends using filtered water. They advise against using distilled or demineralized water as it can affect taste and potentially the machine’s performance over time. Always check your specific model’s manual for their exact recommendations.

• Can I use tap water in my Keurig?

You can, but it’s not always ideal. Tap water can contain minerals and chlorine that affect the taste of your coffee and lead to mineral buildup (scale) inside your machine. If your tap water is very soft and tastes good, it might be acceptable, but filtered is usually better.

• Is filtered water better than bottled water for my Keurig?

Often, yes. Filtered tap water can be more cost-effective and environmentally friendly than bottled water. The quality of filtered water can also be superior to some bottled waters, especially if your tap water is already of good quality before filtering.

• What happens if I use distilled water in my Keurig?

Using distilled water means your coffee will likely taste flat because it lacks the minerals that contribute to flavor and body. Some manufacturers also suggest it could potentially affect the longevity of the machine’s internal components due to the absence of minerals.

• How often should I descale my Keurig?

The frequency depends on your water hardness and how often you use the machine. A general guideline is every 3-6 months. If you notice slower brewing times or your machine sounds different, it’s likely time to descale.

• Does the water filter in my refrigerator work for my Keurig?

Yes, if your refrigerator has a water filter that reduces chlorine and sediment, it’s a good option. This type of filtration is beneficial for both taste and reducing mineral buildup in your Keurig.

• Can I put flavored water or other beverages in my Keurig?

No, absolutely not. Keurig coffee makers are designed to brew with water only. Putting other liquids can damage the machine, clog its components, and is not safe for consumption.

What This Page Does NOT Cover (and Where to Go Next)

• Specific brands or models of water filters.
• Detailed water testing methods for your home.
• Advanced coffee brewing techniques beyond Keurig machines.
• The chemistry of coffee extraction in great detail.
• Troubleshooting specific error codes or mechanical failures of your Keurig.