NSF/ANSI Standard 58
Reverse Osmosis Systems
NSF-58 certifies reverse osmosis (RO) systems, the most comprehensive water filtration technology. RO systems remove 95-99% of dissolved solids, heavy metals, and a wide range of contaminants through a semi-permeable membrane filtration process.
Key Contaminants Removed
Ideal For
- ✓Maximum contaminant removal
- ✓Heavy metal reduction
- ✓Dissolved solids removal
- ✓Highest water purity
Certification Focus: Reverse osmosis drinking water treatment
NSF-58 Certified Filters (10)
Affiliate Disclosure: We earn affiliate commissions from purchases made through our links at no extra cost to you. This supports our testing and keeps our content free. Learn More
iSpring Water Systems LLC
RCC7
NSF Certified:
Daily Production
21.04 gpd
Removes 1 contaminants:
Total Dissolved Solids
iSpring Water Systems LLC
RCC7-BLK
NSF Certified:
Daily Production
25.41 gpd
Removes 9 contaminants:
Asbestos, Barium, Cadmium, Chromium (Total), Copper +4 more
iSpring Water Systems LLC
RCC7AK-BLK
NSF Certified:
Daily Production
25.41 gpd
Removes 9 contaminants:
Asbestos, Barium, Cadmium, Chromium (Total), Copper +4 more
iSpring Water Systems LLC
RCC7AK-UVBLK
NSF Certified:
Daily Production
25.41 gpd
Removes 9 contaminants:
Asbestos, Barium, Cadmium, Chromium (Total), Copper +4 more
iSpring Water Systems LLC
RO500-BN
NSF Certified:
Daily Production
500 gpd
Removes 1 contaminants:
Total Dissolved Solids
iSpring Water Systems LLC
RO500AK-BN
NSF Certified:
Daily Production
500 gpd
Removes 1 contaminants:
Total Dissolved Solids
iSpring Water Systems LLC
RCC7AK-UV
NSF Certified:
Daily Production
21.04 gpd
Removes 1 contaminants:
Total Dissolved Solids
Pentair Residential Filtration, LLC
Pentair GRO-2550
NSF Certified:
Daily Production
10.09 gpd
Removes 2 contaminants:
Cryptosporidium, Total Dissolved Solids
Solventum Purification Inc.
3MRO401
NSF Certified:
Daily Production
11.48 gpd
Removes 15 contaminants:
Arsenic, Barium, Cadmium, Chromium (Total), Chromium (VI) +10 more
Solventum Purification Inc.
3MRO301
NSF Certified:
Daily Production
11.48 gpd
Removes 15 contaminants:
Arsenic, Barium, Cadmium, Chromium (Total), Chromium (VI) +10 more
About NSF-58 Certification
All filters listed on this page have been independently tested and certified by NSF International or WQA to meet the requirements of NSF/ANSI Standard 58. This certification ensures that these filters have been rigorously tested for their ability to reduce specific contaminants as claimed by manufacturers.
We recommend choosing filters based on your specific water quality concerns. You can check your local water quality report or test results to identify which contaminants are present in your water supply, then select filters certified to remove those specific contaminants.