10 Best SGS Certified Filter: Pure Water & Air Solutions

Looking for the best SGS certified filter? We’ve got you covered with a curated list of top picks to help you find the perfect match for clean, safe water and pure air.

SGS-certified filters are your trusted choice for clean, safe water and pure air. These products meet strict standards, ensuring top performance and peace of mind. Whether you need water filters or air purifiers, SGS certification guarantees quality and safety.

Filters keep your home healthy. They remove harmful substances and improve taste. Easy to use and long-lasting, they save you time and money.

Discover the best SGS-certified filters for your needs. From kitchen faucets to air purifiers, find the perfect match for a healthier home. Let’s explore the top picks together!

List of Top 10 SGS Certified Filter

Image Title Best For Price
Resiners 2 Pack Replacement Filter for Purair Air Purifier, 2-in-1 Resin Air Purifier Replacement Filter, H13 True HEPA Replacement Filter, SGS Certified, Epoxy Resin Tools Resin Accessories Supplies Resiners 2 Pack Replacement Filter for Purair Air Purifier, 2-in-1 Resin Air Purifier Replacement Filter, H13 True HEPA Replacement Filter, SGS Certified, Epoxy Resin Tools Resin Accessories Supplies

This product is perfect for epoxy resin artists who want a cleaner and safer workspace. It’s also great for anyone using a Resiners Purair Air Purifier and needs cost-effective, reliable filters.

Alkanatur Filter Replacement for Pitcher (Pack of 3) - Removes Fluorides, Chlorine, Heavy Metals - Filters 400 liters of Tap Water - Replace After 3 Months - CE, ROHS, SGS Certified Water Filter Alkanatur Filter Replacement for Pitcher (Pack of 3) – Removes Fluorides, Chlorine, Heavy Metals – Filters 400 liters of Tap Water – Replace After 3 Months – CE, ROHS, SGS Certified Water Filter

This Alkanatur Filter Replacement is perfect for anyone who wants clean, healthy water. It’s great for families or busy individuals who care about removing harmful stuff like chlorine and heavy metals from their tap water.

NatureFlow Water Filter Pitcher 3.5L, 5-Pack Filters, BPA-Free & SGS Certified, Removes 36 Harmful Substances Including Lead & Chlorine, Improves Taste and Softens Tap Water NatureFlow Water Filter Pitcher 3.5L, 5-Pack Filters, BPA-Free & SGS Certified, Removes 36 Harmful Substances Including Lead & Chlorine, Improves Taste and Softens Tap Water

Families who drink tap water and want it cleaner, safer, and better-tasting without plastic bottles. This pitcher removes lead, chlorine, and odors, using food-grade, BPA-free materials you can trust daily. Save money, skip the store runs, and enjoy fresh water—filter included lasts 3 months. Perfect for health-focused homes that value simplicity and results.

Alkanatur Filter Replacement for Pitcher (Pack of 3) - Removes Fluorides, Chlorine, Heavy Metals - Filters 400 liters of Tap Water - Replace After 3 Months - CE, ROHS, SGS Certified Water Filter Alkanatur Filter Replacement for Pitcher (Pack of 3) – Removes Fluorides, Chlorine, Heavy Metals – Filters 400 liters of Tap Water – Replace After 3 Months – CE, ROHS, SGS Certified Water Filter

This Alkanatur Filter Replacement is perfect for anyone who wants clean, healthy water. It’s great for families, health-conscious individuals, or anyone using a pitcher filter.

iSpring FC15-PB Certified Water Filter Replacement – Removes up to 99% Lead, Reduces Chlorine, THMs, VOCs, Pesticides, and More, SGS-tested iSpring FC15-PB Certified Water Filter Replacement – Removes up to 99% Lead, Reduces Chlorine, THMs, VOCs, Pesticides, and More, SGS-tested

The iSpring FC15-PB Water Filter Replacement is perfect for anyone who wants safer, better-tasting water. It’s ideal for families, health-conscious individuals, or anyone looking to remove lead, chlorine, and other harmful contaminants from their tap water.

NatureFlow Water Filter Pitcher 3.5L, 1-Pack Filters, BPA-Free & SGS Certified, Removes 36 Harmful Substances Including Lead & Chlorine, Improves Taste and Softens Tap Water NatureFlow Water Filter Pitcher 3.5L, 1-Pack Filters, BPA-Free & SGS Certified, Removes 36 Harmful Substances Including Lead & Chlorine, Improves Taste and Softens Tap Water

This NatureFlow Water Filter Pitcher is perfect for families who want clean, great-tasting water without harmful substances. It’s also ideal for anyone looking to save money and reduce plastic waste.

NOVETE Under Sink Water Filter, Upgraded 30K Gallons, NSF/ANSI 42 & 372 Certified, Reduces 99.5% Chlorine, Lead, PFOA/PFOS, Bad Taste, Direct Connect to Kitchen Faucet, USA Tech, UWF1A-PC-1, Black NOVETE Under Sink Water Filter, Upgraded 30K Gallons, NSF/ANSI 42 & 372 Certified, Reduces 99.5% Chlorine, Lead, PFOA/PFOS, Bad Taste, Direct Connect to Kitchen Faucet, USA Tech, UWF1A-PC-1, Black

This NOVETE Under Sink Water Filter is perfect for anyone who wants clean, safe, and great-tasting water at home. It’s easy to set up and works well in kitchens, bathrooms, offices, or RVs.

RUR30-B Replacement Filter Cartridge for UR30 Series Under Sink Water Filter, Reduces Lead, Chlorine, Bad Taste & Odor, NSF/ANSI 372& 42 Certified, 16K Gallons High Capacity RUR30-B Replacement Filter Cartridge for UR30 Series Under Sink Water Filter, Reduces Lead, Chlorine, Bad Taste & Odor, NSF/ANSI 372& 42 Certified, 16K Gallons High Capacity

This RUR30-B Replacement Filter Cartridge is perfect for anyone who wants clean, safe water from their under-sink filter. It’s easy to install and lasts a long time, so you can enjoy pure water without hassle.

Waterdrop BFC1 Skincare Filter, Bathroom Sink Filter Water Faucet for Skin, Countertop Water Filter, SGS Certified, Reduce 99% Chlorine, Nanoscale Deep Clean, Hydrate Deeply Waterdrop BFC1 Skincare Filter, Bathroom Sink Filter Water Faucet for Skin, Countertop Water Filter, SGS Certified, Reduce 99% Chlorine, Nanoscale Deep Clean, Hydrate Deeply

This product is perfect for anyone who wants cleaner, healthier skin. It’s great for those with sensitive or dry skin looking for a gentle, effective solution.

Stokk RUC50-W Replacement Filter Cartridge for UC50 Series Under Sink Water Filter, Reduces Lead, Chlorine, Bad Taste & Odor, NSF/ANSI 372& 42& 53 Certified, 26K Gallons High Capacity Stokk RUC50-W Replacement Filter Cartridge for UC50 Series Under Sink Water Filter, Reduces Lead, Chlorine, Bad Taste & Odor, NSF/ANSI 372& 42& 53 Certified, 26K Gallons High Capacity

This Stokk RUC50-W Replacement Filter Cartridge is perfect for anyone who wants cleaner, better-tasting water right from their tap. If you’re looking for a long-lasting, easy-to-install filter that removes harmful contaminants while keeping essential minerals, this is your ideal solution.

Detailed Reviews

Discover the top 10 SGS Certified Filters, handpicked for quality and performance. Each product is expert-reviewed and backed by real customer feedback, ensuring you get the best value for your needs. Whether you’re looking for clean water, pure air, or healthy skin, this guide has you covered—simple, clear, and ready to help you choose the perfect filter.

1. Resiners 2 Pack Replacement Filter for Purair Air Purifier, 2-in-1 Resin Air Purifier Replacement Filter, H13 True HEPA Replacement Filter, SGS Certified, Epoxy Resin Tools Resin Accessories Supplies

Resiners 2 Pack Replacement Filter for Purair Air Purifier, 2-in-1 Resin Air Purifier Replacement Filter, H13 True HEPA Replacement Filter, SGS Certified, Epoxy Resin Tools Resin Accessories Supplies

The Resiners 2 Pack Replacement Filter is designed for the Purair Air Purifier. It keeps your air clean all year. Replace it every 6-8 months for best results.

This filter removes 83.59% of harmful VOCs from epoxy resin fumes. It’s SGS-certified and tested in high-VOC environments. Enjoy a cleaner, safer workspace for your resin art.

The 2-stage filtration system captures large particles and tiny pollutants. It’s easy to replace with clear instructions. Resiners guarantees your satisfaction with 24/7 support.

Pros Cons
  • Saves money with cost-effective filters for year-round clean air.
  • Removes 83.59% of VOCs, protecting your health during resin work.
  • H13 HEPA filter captures 99.97% of tiny particles, ensuring clean air.
  • Easy replacement with reminders and clear instructions included.
  • Filter replacement needed every 6-8 months, adding to long-term costs.
  • Specific compatibility limits use to Resiners Purair Air Purifier only.
  • No smart integration for automated filter replacement tracking.

Perfect For:

This product is perfect for epoxy resin artists who want a cleaner and safer workspace. It’s also great for anyone using a Resiners Purair Air Purifier and needs cost-effective, reliable filters.

Ready to Purchase?

2. Alkanatur Filter Replacement for Pitcher (Pack of 3) – Removes Fluorides, Chlorine, Heavy Metals – Filters 400 liters of Tap Water – Replace After 3 Months – CE, ROHS, SGS Certified Water Filter

Alkanatur Filter Replacement for Pitcher (Pack of 3) - Removes Fluorides, Chlorine, Heavy Metals - Filters 400 liters of Tap Water - Replace After 3 Months - CE, ROHS, SGS Certified Water Filter

Pure, healthy water starts with the Alkanatur Filter Replacement. Each pack of 3 filters uses activated coconut charcoal to alkalize tap water without adding sodium. It’s certified to remove chlorine, fluorides, and heavy metals, ensuring clean, safe drinking water.

One filter lasts 3 months and cleans 400 liters of water. It’s free from harmful chemicals like BPA and BHPF. Easy to replace, simple to use, and great for daily health.

Pros Cons
  • Removes harmful stuff like chlorine and heavy metals.
  • Filters 400 liters of tap water per filter.
  • Alkalizes water with coconut charcoal, no sodium added.
  • Certified safe, BPA-free, and endocrine disruptor-free.
  • Filters last only 3 months, requiring frequent replacements.
  • No instant filtration, takes time to process water.
  • Pack of 3, may not suit all household sizes.

Perfect For:

This Alkanatur Filter Replacement is perfect for anyone who wants clean, healthy water. It’s great for families or busy individuals who care about removing harmful stuff like chlorine and heavy metals from their tap water.

Ready to Purchase?

3. NatureFlow Water Filter Pitcher 3.5L, 5-Pack Filters, BPA-Free & SGS Certified, Removes 36 Harmful Substances Including Lead & Chlorine, Improves Taste and Softens Tap Water

NatureFlow Water Filter Pitcher 3.5L, 5-Pack Filters, BPA-Free & SGS Certified, Removes 36 Harmful Substances Including Lead & Chlorine, Improves Taste and Softens Tap Water

Stop buying bottled water. The NatureFlow Water Filter Pitcher uses advanced 4-layer filtration to remove 36 harmful substances—including lead, chlorine, and bad tastes—so your tap water comes out clean, fresh, and safe. SGS certified and made from 100% BPA-free, food-grade materials, it’s built for everyday health.

Each filter lasts up to 3 months. That’s 63.4 gallons of pure water—no more constant replacements. Five filters included mean 317 total gallons filtered. You’ll skip 2,401 plastic bottles, saving money and cutting waste.

The 3.5L size fits neatly in your fridge. Pour smoothly with the spill-proof spout. And with a 1-year warranty and 30-day easy returns, you’re fully covered. Every sip is guaranteed safe and great-tasting.

Pros Cons
  • Removes 36 harmful substances for cleaner, safer water.
  • Long-lasting filters save money and reduce plastic waste.
  • BPA-free, food-grade materials ensure safe daily use.
  • Compact design fits any space with easy pouring.
  • 1-year warranty offers reliable after-sales support.
  • No TDS reduction, but removes harmful impurities like chlorine and lead.
  • Filters last 3 months, requiring regular replacement for continuous use.
  • 3.5L capacity may not be enough for larger households or high demand.

Perfect For:

Families who drink tap water and want it cleaner, safer, and better-tasting without plastic bottles. This pitcher removes lead, chlorine, and odors, using food-grade, BPA-free materials you can trust daily. Save money, skip the store runs, and enjoy fresh water—filter included lasts 3 months. Perfect for health-focused homes that value simplicity and results.

Ready to Purchase?

4. Alkanatur Filter Replacement for Pitcher (Pack of 3) – Removes Fluorides, Chlorine, Heavy Metals – Filters 400 liters of Tap Water – Replace After 3 Months – CE, ROHS, SGS Certified Water Filter

Alkanatur Filter Replacement for Pitcher (Pack of 3) - Removes Fluorides, Chlorine, Heavy Metals - Filters 400 liters of Tap Water - Replace After 3 Months - CE, ROHS, SGS Certified Water Filter

Alkanatur Filter Replacement keeps your water clean and healthy. It removes harmful stuff like fluorides, chlorine, and heavy metals. Each pack comes with three filters, so you’re set for a while.

Each filter works for 400 liters of water. It lasts up to 3 months with regular use. The activated coconut charcoal does the job without adding sodium.

These filters are certified and safe. They meet CE, ROHS, and SGS standards. Enjoy clean, alkaline water every day with Alkanatur.

Pros Cons
  • Removes fluorides, chlorine, and heavy metals for cleaner water.
  • Alkalizes water with activated coconut charcoal, no sodium added.
  • Filters up to 400 liters of tap water per filter.
  • Certified by CE, ROHS, and SGS for quality assurance.
  • Filters last only 3 months, requiring frequent replacements.
  • No indication of water flow rate during filtering.
  • Pack of 3 may be too many for small households.

Perfect For:

This Alkanatur Filter Replacement is perfect for anyone who wants clean, healthy water. It’s great for families, health-conscious individuals, or anyone using a pitcher filter.

Ready to Purchase?

5. iSpring FC15-PB Certified Water Filter Replacement – Removes up to 99% Lead, Reduces Chlorine, THMs, VOCs, Pesticides, and More, SGS-tested

iSpring FC15-PB Certified Water Filter Replacement – Removes up to 99% Lead, Reduces Chlorine, THMs, VOCs, Pesticides, and More, SGS-tested

The iSpring FC15-PB Water Filter Replacement is SGS-tested to remove up to 99% of lead, ensuring safer drinking water. It also reduces chlorine, THMs, VOCs, and pesticides, making your water cleaner and healthier.

This filter improves taste and odor, giving you fresher, better-tasting water for drinking and cooking. It fits standard 10” x 2.5” housings and is easy to install, with each filter individually sealed for optimal quality.

Long-lasting performance means it lasts up to 12 months or 7,000 gallons, depending on your water quality. Ideal for daily use, it provides reliable, clean water for your home.

Pros Cons
  • SGS-certified to remove 99% of dangerous lead
  • Cleans chlorine, pesticides, THMs, and VOCs effectively
  • Makes water taste fresh and smell clean instantly
  • Fits any standard 10" housing—no tools, no hassle
  • Lasts up to 12 months or 7,000 gallons reliably
  • Not for all filter sizes, check compatibility first.
  • No indicator for filter lifespan, track usage manually.
  • Higher cost than basic filters, but worth it for safety.

Perfect For:

The iSpring FC15-PB Water Filter Replacement is perfect for anyone who wants safer, better-tasting water. It’s ideal for families, health-conscious individuals, or anyone looking to remove lead, chlorine, and other harmful contaminants from their tap water.

Ready to Purchase?

6. NatureFlow Water Filter Pitcher 3.5L, 1-Pack Filters, BPA-Free & SGS Certified, Removes 36 Harmful Substances Including Lead & Chlorine, Improves Taste and Softens Tap Water

NatureFlow Water Filter Pitcher 3.5L, 1-Pack Filters, BPA-Free & SGS Certified, Removes 36 Harmful Substances Including Lead & Chlorine, Improves Taste and Softens Tap Water

The NatureFlow Water Filter Pitcher gives you clean, great-tasting water every day. Its 4-layer filtration removes 36 harmful substances, like lead and chlorine, while softening tap water.

It’s BPA-free, food-grade, and SGS certified for safety. Each long-lasting filter purifies 63.4 gallons, saving money and reducing plastic waste.

Pros Cons
  • Removes 36 harmful substances for cleaner, safer water.
  • Long-lasting filters save money and reduce plastic waste.
  • BPA-free and food-grade materials ensure safe daily use.
  • Compact design fits easily in fridge or countertop.
  • 1-year warranty offers reliable after-sales support.
  • Doesn’t remove TDS.
  • Limited filter life for heavy use.

Perfect For:

This NatureFlow Water Filter Pitcher is perfect for families who want clean, great-tasting water without harmful substances. It’s also ideal for anyone looking to save money and reduce plastic waste.

Ready to Purchase?

7. NOVETE Under Sink Water Filter, Upgraded 30K Gallons, NSF/ANSI 42 & 372 Certified, Reduces 99.5% Chlorine, Lead, PFOA/PFOS, Bad Taste, Direct Connect to Kitchen Faucet, USA Tech, UWF1A-PC-1, Black

NOVETE Under Sink Water Filter, Upgraded 30K Gallons, NSF/ANSI 42 & 372 Certified, Reduces 99.5% Chlorine, Lead, PFOA/PFOS, Bad Taste, Direct Connect to Kitchen Faucet, USA Tech, UWF1A-PC-1, Black

The NOVETE Under Sink Water Filter delivers clean, safe water for your home. It reduces 99.5% of chlorine, lead, and other harmful substances. Enjoy great-tasting water straight from your tap.

This filter uses advanced 6-stage filtration to remove impurities. It lasts up to 3 years or 30,000 gallons, saving you money. Easy setup means no drilling is needed for installation.

Track your filter’s lifespan with the NOVETE App. Get automatic reminders to replace it on time. High flow rate ensures quick, clog-free water for daily use.

Pros Cons
  • Certified for pure water, meeting NSF/ANSI standards.
  • 6-stage filtration removes 99.5% chlorine, lead, and PFAS.
  • Long-lasting filter saves money and reduces plastic waste.
  • High flow rate fills a cup in 4 seconds, no clogging.
  • Easy setup with direct faucet connection, no drilling needed.
  • Filter replacement needed every 12 months in poor water quality areas.
  • App dependency for tracking filter lifespan may not suit everyone.
  • Initial setup requires careful hose insertion to avoid leaks.

Perfect For:

This NOVETE Under Sink Water Filter is perfect for anyone who wants clean, safe, and great-tasting water at home. It’s easy to set up and works well in kitchens, bathrooms, offices, or RVs.

Ready to Purchase?

8. RUR30-B Replacement Filter Cartridge for UR30 Series Under Sink Water Filter, Reduces Lead, Chlorine, Bad Taste & Odor, NSF/ANSI 372& 42 Certified, 16K Gallons High Capacity

RUR30-B Replacement Filter Cartridge for UR30 Series Under Sink Water Filter, Reduces Lead, Chlorine, Bad Taste & Odor, NSF/ANSI 372& 42 Certified, 16K Gallons High Capacity

The RUR30-B Replacement Filter Cartridge is perfect for Stokk UR30-B under sink systems. It keeps your water filter working at its best, ensuring clean, safe water every day.

This filter lasts up to 24 months or 16,000 gallons, so you save time and money. It removes harmful stuff like lead, chlorine, and bad tastes, while keeping essential minerals in your water.

Easy to install, made from safe materials, and certified by SGS. Enjoy pure water with no hassle.

Pros Cons
  • Long-lasting filter, 16,000 gallons or 24 months of pure water.
  • Removes lead, chlorine, and bad taste for fresh, clean water.
  • Easy installation, simple turn to replace, no hassle.
  • Certified safe, BPA-free, lead-free, and NSF/ANSI approved.
  • Not universal: Only works with Stokk UR30-B systems, limiting compatibility.
  • Long replacement time: Must wait 24 months for a new filter, even with low use.
  • No quick fix: Requires simple turn replacement, but still needs effort.

Perfect For:

This RUR30-B Replacement Filter Cartridge is perfect for anyone who wants clean, safe water from their under-sink filter. It’s easy to install and lasts a long time, so you can enjoy pure water without hassle.

Ready to Purchase?

9. Waterdrop BFC1 Skincare Filter, Bathroom Sink Filter Water Faucet for Skin, Countertop Water Filter, SGS Certified, Reduce 99% Chlorine, Nanoscale Deep Clean, Hydrate Deeply

Waterdrop BFC1 Skincare Filter, Bathroom Sink Filter Water Faucet for Skin, Countertop Water Filter, SGS Certified, Reduce 99% Chlorine, Nanoscale Deep Clean, Hydrate Deeply

Pure water is key for healthy skin. The Waterdrop BFC1 Skincare Filter removes 99% of chlorine and tiny impurities. It gives you ultra-clean water for a fresh, glowing face.

In just 2 weeks, see less redness and smaller pores. Enjoy soft, hydrated skin every day for only $0.50.

Pros Cons
  • Reduces 97% chlorine for cleaner, healthier skin.
  • Visible results in 2 weeksglows naturally.
  • Micro-nano bubbles hydrate deeply, no dryness.
  • Affordable upgradejust $0.50 a day.
  • Needs fridge storage for filters to stay fresh.
  • Replacement filters add ongoing costs over time.
  • No freezer storage allowed, only fridge.

Perfect For:

This product is perfect for anyone who wants cleaner, healthier skin. It’s great for those with sensitive or dry skin looking for a gentle, effective solution.

Ready to Purchase?

10. Stokk RUC50-W Replacement Filter Cartridge for UC50 Series Under Sink Water Filter, Reduces Lead, Chlorine, Bad Taste & Odor, NSF/ANSI 372& 42& 53 Certified, 26K Gallons High Capacity

Stokk RUC50-W Replacement Filter Cartridge for UC50 Series Under Sink Water Filter, Reduces Lead, Chlorine, Bad Taste & Odor, NSF/ANSI 372& 42& 53 Certified, 26K Gallons High Capacity

Stop compromising on water quality. The Stokk RUC50-W Replacement Filter delivers pure, clean water by removing lead, chlorine, bad taste, and odor—certified to NSF/ANSI 42 & 53 standards for real results.

It fits perfectly with your Stokk UC50 Series system. Just twist to install. Replace every 24 months or 26,000 gallons—whichever comes first—for lasting performance. Refreshing water made simple.

Choose safety backed by science. Made from natural carbon fiber and 100% BPA- and lead-free materials, this filter protects your water without stripping essential minerals. Scan the QR code to view the official SGS test report—peace of mind in seconds.

Pros Cons
  • Long-lasting filter lasts 24 months or 26,000 gallons.
  • Removes lead, chlorine, and bad taste & odor.
  • Easy installation with a simple turn replacement.
  • Certified by NSF/ANSI for safe, pure water.
  • 24-month replacement needed, may be costly over time.
  • No smart indicator for filter replacement timing.
  • UC50 Series only, not compatible with other systems.

Perfect For:

This Stokk RUC50-W Replacement Filter Cartridge is perfect for anyone who wants cleaner, better-tasting water right from their tap. If you’re looking for a long-lasting, easy-to-install filter that removes harmful contaminants while keeping essential minerals, this is your ideal solution.

Ready to Purchase?

Buying Guide

SGS-certified filters are your trusted choice for clean water and pure air. These products meet strict standards, ensuring top performance and peace of mind.

Choosing the best SGS-certified filter can be easy with the right guide. Here’s what to consider:

  • Type of Filter:
    Decide if you need a water filter or air purifier. Each type is designed for specific needs, like removing harmful substances or improving taste.

  • Certification:
    Look for SGS certification to ensure the filter meets strict quality and safety standards. This guarantees reliable performance.

  • Filtration Capacity:
    Check how much water or air the filter can clean. For example, some filters last 3 months or 400 liters, while others handle 16,000 gallons.

  • Ease of Use:
    Choose filters that are easy to install and replace. Clear instructions and simple designs save time and effort.

  • Longevity:
    Opt for long-lasting filters to save money and reduce replacements. Some last up to 3 years or 30,000 gallons.

  • Health Benefits:
    Filters should remove harmful substances like chlorine, lead, and VOCs. They should also improve taste and soften water for better health.

  • Environmental Impact:
    Pick filters that reduce plastic waste by replacing bottled water. Some filters can save 2,401 plastic bottles.

  • Cost-Effectiveness:
    Compare prices and lifespan to find the best value. Long-lasting filters often cost less in the long run.

  • Brand Reputation:
    Choose brands with good reviews and customer support. Brands like NatureFlow and Alkanatur are known for quality.

  • Additional Features:
    Look for extras like spill-proof spouts, app reminders, or warranties. These add convenience and assurance.

With these factors in mind, you’ll find the perfect SGS-certified filter for a healthier home.