Marcus Chen
Water Quality Analyst
Marcus spent eight years in municipal water treatment before turning to consumer product journalism. He combines hands-on experience with EPA compliance and NSF testing protocols to evaluate home water filters against real-world contaminant data — not just marketing claims.
B.S. Environmental Engineering, UC Davis. Former water treatment plant operator (T3 certified). 3+ years writing water quality product reviews.
Areas of Expertise
Articles
Best Reverse Osmosis Systems for Home (2026)
We ranked the best reverse osmosis system options for home against NSF/ANSI 58 certifications, GPD output, and waste ratios. Tankless, tank, and countertop picks.
May 30, 2026
Best Under-Sink Water Filters (2026)
We compared the best under sink water filter systems against NSF/ANSI 53 and 58 certifications: carbon-block, ultrafiltration, and reverse osmosis picks that fit real cabinets.
June 2, 2026
Best Water Filters for PFAS Removal (2026)
We compared the best water filters for PFAS removal against NSF certifications and EPA limits. Reverse osmosis and certified carbon pitchers that actually remove forever chemicals.
May 28, 2026
Best Whole House Water Filters (2026)
We compared the best whole house water filter systems on flow rate, capacity, and certified chlorine reduction. Point-of-entry picks that protect every tap in your home.
June 11, 2026