The Woder Blog

Filters fall into two groups. By technology, you’ve got sediment, carbon, KDF, resin softening, RO, UV, ceramic and specialty media. By system, there are pitchers, faucet mounts, countertop units, under-sink and inline filters, fridge cartridges and whole-home setups. You can compare real examples in our water filtration systems catalog. Key takeaways: Technology decides what a […]

A filter cleans in one or more of four ways. It blocks particles, traps chemicals on a porous surface like carbon, swaps unwanted ions for harmless ones, or forces flow through a membrane. Most home units combine two or more of these. See them in action in our water filtration systems catalog. Key takeaways: Carbon […]

In most of the US, yes. Public systems are tested regularly and usually meet EPA standards. The real risks come from lead in older pipes, PFAS, private wells, and boil notices after main breaks. A certified filter at the kitchen tap, like our lead removal under-sink filters, adds protection where it counts. Key takeaways: Most […]

No single option is best for every well. Match the equipment to your lab results: a sediment filter for grit, an iron filter for stains, a softener for scale, UV for bacteria, and a certified drinking filter at the kitchen sink. Browse our under-sink sediment filters for that last step. Key takeaways: Your lab report […]

A complete setup for a private well usually includes a yearly lab test, a sediment stage, iron and sulfur treatment, a softener for hardness, carbon for chemicals and taste, UV for bacteria, and a drinking filter at the kitchen sink. You only need the stages your test calls for. For that last stage, see our […]

Test your tap first, list what you want to reduce, pick a format that fits your kitchen, then confirm independent certification and long-term cartridge cost. For most families, an under-sink system hits the best balance of performance and price. Compare our under-sink water filter systems or try the Filter Wizard on our site. Key takeaways: […]

This pocket tester estimates how much dissolved material, mostly minerals and salts, is in a glass. It’s handy for comparing sources and spotting changes, but it can’t detect lead, PFAS or bacteria. For safety, rely on a lab test and a certified filter, like the ones in our water filtration systems catalog. Key takeaways: Most […]

The right whole-home system is the one that matches your test results. Carbon handles chlorine, catalytic carbon handles chloramine, sediment cartridges catch grit, and wells usually need several stages. Expect roughly $1,000 to $4,000 installed. For drinking and cooking, lots of homes also add a certified unit at the kitchen sink, like our under-sink water […]

The Elite pitcher filter lasts three times longer than PUR PLUS cartridges and carries PFAS certification that PUR pitcher filters lack, making it the stronger choice for most households. PUR PLUS costs less upfront and claims to reduce more than 70 contaminants. The right pick depends on your water quality, refill habits, and whether PFAS […]

ZeroWater pitchers deliver verified 99.6% TDS reduction and strong PFAS and chromium-6 removal, making them one of the most thorough pitcher filters tested in this zero water filter review. The tradeoffs are real: filters exhaust quickly in high-TDS households, spent cartridges can produce a fishy smell, and a microplastics lawsuit has raised questions. Whether those […]