How to choose water

Water. It’s not just water anymore, is it? The options have exploded, and so has the price tag on some of them. You’re trying to stay hydrated, maybe avoid tap chemicals, or just get something that tastes good, and suddenly you’re staring down an aisle of bewildering choices. This isn’t about luxury; it’s about making an informed decision for a household staple. We’ve been tracking water unit pricing across retailers for years, noting the quiet creep on everything from purified jugs to sparkling cans. Let’s cut through the marketing and get to what matters.

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Understanding Your Options: Tap, Filtered, Bottled

Before you even think about buying, let’s establish the baseline: your tap water.

Tap Water: The Unsung Hero (or Hidden Problem)

For many, tap water is the most economical and environmentally friendly choice. However, quality varies wildly. The EPA sets national standards, but local infrastructure, agricultural runoff, and industrial pollutants can all affect what comes out of your faucet.

Our Methodology: We don’t just take municipal reports at face value. We recommend checking your local water utility’s annual quality report, often available online. Better yet, invest in a home testing kit. Simple, inexpensive kits can test for common contaminants like chlorine, lead, pesticides, and hardness. We’ve found that kits like the Watersafe WS425B Drinking Water Test Kit provide a good balance of comprehensiveness and ease of use for general household concerns. If you have specific concerns, or are on well water, more advanced lab testing might be warranted, but that’s beyond the scope of a routine purchase decision.

Cost Analysis: Assuming your tap water is potable, the cost is pennies per gallon. The main “cost” here is peace of mind, which brings us to filtering.

Filtering: The Practical Compromise

If your tap water has an off-taste, a slight odor, or you’ve identified contaminants you want to reduce, filtering is usually the most cost-effective solution. There are several categories:

• Pitcher Filters: These are the entry point for most households. They’re convenient, portable, and relatively inexpensive upfront. Brands like Brita and PUR dominate this space.
  • Pros: Easy to use, no installation, good for small volumes.
  • Cons: Slow filtration, limited capacity, filter replacement costs add up.
  • RefillWatch Insight: We track filter replacement costs religiously. A Brita Longlast filter, for example, might cost you around $15-20 and last for six months. Over a year, that’s $30-40. Compared to buying bottled water, this is still a massive saving, but it’s a recurring cost many forget to factor in.
• Faucet-Mounted Filters: These attach directly to your tap, offering filtered water on demand.
  • Pros: Instant filtered water, no refilling pitchers.
  • Cons: Can be bulky, may reduce water pressure, not universal fit, filter replacement still a factor.
• Under-Sink Filters: These are plumbed directly into your cold water line, delivering filtered water through a dedicated faucet or your existing one.
  • Pros: High capacity, excellent filtration, out of sight.
  • Cons: Installation required, higher upfront cost, filter changes can be more involved.
  • RefillWatch Insight: For households that consume a lot of filtered water, an under-sink system like the APEC Water Systems ROES-50 often offers the best long-term value per gallon. While the initial outlay is higher, the per-gallon cost, when factoring in filter changes over several years, consistently beats bottled water and often even pitcher filters for high-volume users.
• Whole-House Filters: These filter all water entering your home.
  • Pros: Filtered water at every tap, showers, and appliances.
  • Cons: Significant upfront cost, professional installation recommended, larger filter replacements.

Complaint Volume: For pitcher and faucet filters, the most common complaints revolve around filter lifespan not matching claims, slow filtration, and difficulty with installation (for faucet models). Under-sink systems tend to have fewer complaints per 10,000 units sold, primarily technical issues related to leaks or pressure reduction.

Bottled Water: Convenience at a Premium

This is where things get truly opaque. Bottled water isn’t just one product; it’s a spectrum.

• Purified Water: Often tap water that has undergone reverse osmosis, distillation, or deionization to remove impurities. It’s then typically re-mineralized for taste. Brands like Aquafina and Dasani fall into this category.
  • RefillWatch Insight: You are often paying a premium for what is essentially filtered tap water, packaged for convenience. Our unit pricing logs consistently show purified bottled water costing 500-1000% more than filtered tap water from a home system.
• Spring Water: Water collected from an underground formation from which water flows naturally to the Earth’s surface. It must be collected at the spring or through a bore hole tapping the underground formation. Brands like Evian and Poland Spring are examples.
  • RefillWatch Insight: The “natural minerals” claim is often used to justify higher prices. While some spring waters do have a distinct mineral profile that some prefer, these minerals aren’t necessarily superior to those found in tap water or added back into purified water. We’ve seen significant price creep on spring water, especially in smaller bottle formats.
• Mineral Water: Similar to spring water, but with a minimum level of dissolved solids (minerals) that are consistent at the source. It cannot have minerals added or removed. Pellegrino and Perrier are well-known mineral waters.
  • RefillWatch Insight: This is generally the most expensive category of still water. The taste is highly dependent on the specific mineral composition. This is more of a gourmet choice than a routine hydration strategy for budget-conscious consumers.
• Alkaline Water: Water with a pH level higher than standard tap water, often achieved through ionization or by adding alkaline minerals. Brands like Essentia and Smartwater (which is vapor-distilled, then re-mineralized) market heavily on this.
  • RefillWatch Insight: The health claims around alkaline water are largely unsubstantiated by scientific consensus. From a purely cost perspective, it is one of the most expensive types of bottled water on the market. We’ve observed aggressive pricing strategies and frequent “shrinkflation” in this category, with bottle sizes subtly decreasing while prices hold or rise.
• Sparkling Water/Seltzer: Carbonated water, sometimes with added natural flavors. Can be purified, spring, or mineral water. Brands like LaCroix, Bubly, and Topo Chico.
  • RefillWatch Insight: This is a category where unit pricing varies wildly based on packaging (cans vs. bottles) and brand. Buying in bulk (e.g., a 24-pack of 12oz cans vs. individual bottles) always yields significant savings. For the truly budget-minded, a home carbonator like a SodaStream Terra combined with filtered tap water is by far the cheapest way to get sparkling water. Our 90-day household reorder log for CO2 cylinders shows a cost per liter that is a fraction of even discounted sparkling water cans.

Complaint Volume: For bottled water, complaints often center on plastic taste, perceived quality issues (e.g., cloudy water), and increasingly, environmental concerns regarding plastic waste. For sparkling water, “flat” cans or bottles are a common grievance.

The Unit Price Is Your North Star

When evaluating water, whether it’s bottles, filters, or CO2 cartridges for a SodaStream, the only metric that truly matters for your wallet is the unit price. This is typically price per ounce or price per gallon.

Our Methodology: We track unit pricing for each consumable across at least three retailers (e.g., Walmart, Target, Amazon, local grocery chains) weekly, with screenshots filed in our pricing log. This allows us to identify true sales versus merely “discounted” items that are still overpriced on a per-unit basis.

Practical Application:

• Bottled Water: A 24-pack of 16.9oz bottles might seem cheap at $5.99, but that’s about $0.014 per ounce. A 2.5-gallon jug of purified water for $3.99 is roughly $0.012 per ounce – already cheaper. And a 5-gallon refillable bottle at a supermarket for $5.00 is $0.0078 per ounce. The larger the format, the lower the unit price almost universally.
• Filters: Don’t just look at the upfront cost of the filter. Divide the filter’s price by the number of gallons it’s rated for. A $20 filter rated for 100 gallons costs $0.20 per gallon. An under-sink filter system might use a $50 filter rated for 1,000 gallons, bringing the cost down to $0.05 per gallon. This is how you identify true value.

Always compare apples to apples (or ounces to ounces, gallons to gallons). Don’t be swayed by “sale” signs unless the unit price is genuinely lower than your baseline. Here’s a deeper dive into unit pricing strategies.

Sustainability & Logistics: Beyond the Price Tag

While RefillWatch prioritizes cost, we understand that for many, environmental impact and logistical convenience are also critical factors.

Plastic Waste: A Growing Concern

The single-use plastic bottle problem is undeniable. Even if you recycle, the energy and resources involved in producing, transporting, and then recycling plastic bottles are substantial.

• The RefillWatch Stance: For routine hydration, relying on filtered tap water and reusable bottles is superior to purchasing bottled water in single-use plastic. This isn’t just about the environment; it’s often the cheapest option in the long run.
• When Bottled is Justified: There are legitimate scenarios for bottled water: emergencies, travel where tap water is unsafe, or specific health needs. For these, consider larger formats (gallon jugs) to reduce plastic per serving, or look for brands using recycled plastic (rPET) if available, though this often comes at a price premium.

Storage and Transport

Don’t underestimate the physical burden and storage requirements of bottled water.

• Bulk Buys: Buying cases of water saves you money per unit, but requires space. Do you have a pantry, garage, or basement area where you can store 24-packs or 5-gallon jugs?
• Heavy Lifting: A case of 24 16.9oz bottles weighs about 25 pounds. A 5-gallon jug weighs over 40 pounds. Factor in the effort of transporting these from the store and into your home. This is where the convenience of a tap filter truly shines.
• Subscription Services: Some services deliver bottled water directly to your home. While convenient, our tracking shows these almost invariably carry a significant price premium over buying in bulk yourself. The subscription reorder rate from our own household logs for these services is low, primarily due to cost and the physical accumulation of empty bottles. For more on evaluating subscription services, see our guide here.

The Bottom Line

For the vast majority of households, the most economical, convenient, and environmentally responsible choice for daily hydration is filtered tap water. Invest in a good quality pitcher filter or, even better, an under-sink system. Calculate the unit price of your filters and track replacement costs.

If you must buy bottled water, prioritize purified water in the largest format you can store and transport, and always compare unit prices across retailers. Avoid expensive “alkaline” or “mineral” waters for routine consumption unless you have a specific, medically-backed reason. For sparkling water, a home carbonator is the undisputed champion of cost and convenience.

Don’t let clever marketing or perceived convenience drain your wallet. Water is a necessity, not a luxury. Choose wisely, and your budget will thank you.