RO is the only residential technology certified to remove PFAS — critical for Huntsville (6.5+ ppt) and Decatur. Here's every system worth considering.
✔ Reviewed by a 18-Year Water Treatment Professional
With PFAS detected at 6.5+ ppt in Huntsville's source water and industrial contamination in Decatur, an NSF/ANSI 58-certified reverse osmosis system has moved from "nice to have" to essential for North Alabama drinking water. A quality under-sink RO system costs $200–$400 and lasts 10+ years with annual filter changes.
Reverse osmosis is the only residential water treatment technology certified to remove PFAS — and with the February 2026 Sierra Club report confirming PFAS at 6.5+ parts per trillion in Huntsville's source water (above the EPA's 4 ppt limit), an RO system has become essential for North Alabama drinking water. These guides cover every aspect of choosing, installing, and maintaining a reverse osmosis system for North Alabama's specific water conditions, including compatibility with our extreme hardness levels and chloramine disinfection.
Top under-sink and whole-home RO systems reviewed for PFAS removal and N. AL water.
Read guide →Why an RO system is now urgent for Huntsville and Decatur homeowners.
Read guide →In Madison (32 GPG), yes. In Decatur (soft water), no. Here's the breakdown.
Read guide →When to use each — and why most N. AL homes benefit from both.
Read guide →