Brondell Circle RC100 Reverse Osmosis System review
Under-sink reverse osmosis. Plumber recommended if you are not comfortable with a drain saddle and a tank. Not a whole-house solution. Listed to WQA/ANSI 42, WQA/ANSI 53, WQA/ANSI 58.
What it removes
| Contaminant | Evidence | Stated reduction | Scope |
|---|---|---|---|
| Chromium (total) | Certified | not stated | hexavalent,trivalent |
| Arsenic | Certified | not stated | arsenic pentavalent |
| Chlorine (residual) | Certified | not stated | taste odor |
| Selenium | Certified | not stated | |
| Barium | Certified | not stated | |
| 1,2-Dibromo-3-chloropropane | Certified | not stated | voc surrogate |
| Fluoride | Certified | not stated | |
| Lead | Certified | not stated | |
| Total Dissolved Solids | Certified | not stated | |
| Benzene | Certified | not stated | voc surrogate |
| Total Trihalomethanes | Certified | not stated | voc surrogate |
| Haloacetic Acids (HAA5) | Certified | not stated | voc surrogate |
| Tetrachloroethylene | Certified | not stated | voc surrogate |
| Trichloroethylene | Certified | not stated | voc surrogate |
| Total Coliform | Certified | not stated | cyst |
| Cadmium | Certified | not stated | |
| Radium 226 + 228 | Certified | not stated | |
| Copper | Certified | not stated |
Certified is an NSF, WQA, or IAPMO listing for that claim.
One drinking-water tap. Not a whole-house solution.
Certifications
- WQA/ANSI 42: Aesthetic Chlorine Reduction (from the manufacturer's page, not yet checked against the certifier's database)
- WQA/ANSI 42: Taste and Odor Reduction (from the manufacturer's page, not yet checked against the certifier's database)
- WQA/ANSI 53: VOC Reduction (from the manufacturer's page, not yet checked against the certifier's database)
- WQA/ANSI 53: VOC Reduction (from the manufacturer's page, not yet checked against the certifier's database)
- WQA/ANSI 53: VOC Reduction (from the manufacturer's page, not yet checked against the certifier's database)
- WQA/ANSI 53: VOC Reduction (from the manufacturer's page, not yet checked against the certifier's database)
- WQA/ANSI 53: VOC Reduction (from the manufacturer's page, not yet checked against the certifier's database)
- WQA/ANSI 53: VOC Reduction (from the manufacturer's page, not yet checked against the certifier's database)
- WQA/ANSI 58: Arsenic (Pentavalent) Reduction (from the manufacturer's page, not yet checked against the certifier's database)
- WQA/ANSI 58: Barium Reduction (from the manufacturer's page, not yet checked against the certifier's database)
- WQA/ANSI 58: Cadmium Reduction (from the manufacturer's page, not yet checked against the certifier's database)
- WQA/ANSI 58: Copper Reduction (from the manufacturer's page, not yet checked against the certifier's database)
- WQA/ANSI 58: Cyst Reduction (from the manufacturer's page, not yet checked against the certifier's database)
- WQA/ANSI 58: Fluoride Reduction (from the manufacturer's page, not yet checked against the certifier's database)
- WQA/ANSI 58: Chromium (Hexavalent) Reduction (from the manufacturer's page, not yet checked against the certifier's database)
- WQA/ANSI 58: Lead Reduction (from the manufacturer's page, not yet checked against the certifier's database)
- WQA/ANSI 58: Radium 226/228 Reduction (from the manufacturer's page, not yet checked against the certifier's database)
- WQA/ANSI 58: Selenium Reduction (from the manufacturer's page, not yet checked against the certifier's database)
- WQA/ANSI 58: TDS Reduction (from the manufacturer's page, not yet checked against the certifier's database)
- WQA/ANSI 58: Chromium (Trivalent) Reduction (from the manufacturer's page, not yet checked against the certifier's database)
Compact 4-stage RO with integrated 1.6 gal (6 L) reservoir in one enclosure, non-electric, patented smart valve; PDS: 40 GPD production (flow_gpm is production rate), 33.5% efficiency rating. Filters: RF-20 sediment/carbon pack every 6 mo ($79.99), RF-40 membrane every 24 mo ($89.99); annual_replacement_cost est. $205. WQA Gold Seal to NSF/ANSI 42, 53, 58 and 372 per manufacturer Performance Data Sheet (percentages below are from that PDS). Pentavalent arsenic only. Fluoride reduction is lower (83.8%) than most RO units. Amazon listing verified but had no direct Amazon offer on 2026-09-14 (third-party 'See All Buying Options' only), so price is manufacturer's $359.99 (list $449.99).