Waterdrop · Countertop filter
Waterdrop Countertop faucet filter CTF-01: what it removes and what it costs
Model: Waterdrop WD-CTF-01 countertop faucet-connected filter (stainless housing, diverter on faucet); filter WD-CFF-01
The Waterdrop Countertop faucet filter CTF-01 is certified (NSF/ANSI 42) to reduce chlorine. Waterdrop also claims lead and fluoride from lab tests that are not certification. For 2 people drinking and cooking with it, replacement filters cost about $40 a year.
1
certified reductions we track
0.5¢
filters per gallon at rated life
Price checked 2026-10-23. We may earn a commission.
What the Waterdrop Countertop faucet filter CTF-01 removes
"Certified" means a certifier (NSF, WQA, IAPMO or CSA) lists this exact product for that reduction claim; the listing is linked. "Brand test only" means Waterdrop cites a lab report but no certifier lists the claim. See certified vs. tested.
| Contaminant | Status | Evidence |
|---|---|---|
| Chlorine | Certified | IAPMO R&T listing, NSF/ANSI 42 ("Chlorine, Taste and Odor") |
| Lead | Brand test only | Waterdrop (no lab or report named): "Fluoride, lead, heavy metals, sediment, rust (brand claim)" |
| Fluoride | Brand test only | Waterdrop (no lab or report named): "Fluoride, lead, heavy metals, sediment, rust (brand claim)" |
Not verified, either way (no certification or brand claim): PFAS, Chloramine, Arsenic, Nitrate, Chromium 6, Mercury, Microplastics, Cysts, VOCs, TDS, Bacteria and viruses, Iron, Copper, Uranium, 1,4-dioxane.
What it costs to run
Yearly cost = replacements per year × filter price, for each filter it uses; a filter is replaced at its gallon rating or its month limit, whichever comes first. Water use: drinking and cooking water (0.28 gallons per person a day, EPA's average adult intake).
| Household | Gallons a year | Filters a year | Total a year | Per gallon |
|---|---|---|---|---|
| 1 person | 102 | $40 | $40 | 39¢ |
| 2 people | 204 | $40 | $40 | 20¢ |
| 4 people | 409 | $40 | $40 | 9.8¢ |
Per-gallon costs in the table are for real use, so they also count any filter replaced at its month limit before it reaches its gallon rating. At rated filter life alone, filters cost 0.5¢ a gallon (the figure at the top of this page).
Replacement filters
| Filter | Rated life (gallons) | Rated life (months) | Price |
|---|---|---|---|
| Waterdrop WD-CFF-01 | 8,000 Source noteBrand: 12 months or 8,000 gallons; IAPMO listing capacity 8,000 gal waterdropfilter.com | 12 Source note | $39.99 Source notewaterdropfilter.com 2026-10-23 waterdropfilter.com |
Specs
- Type
- Countertop filter
- Price
- $80
Source note
waterdropfilter.com price 2026-10-23, no compare-at/sale shown; bundle with extra filter $110.99 waterdropfilter.com
- Installation
- DIY (under-sink or inline fittings)
- Flow rate
- 1.6 gal/min
Source note
Brand spec 1.6 gpm at 60 psi; IAPMO R&T listing shows 1 gpm waterdropfilter.com
- Needs power
- No
Compare the Waterdrop Countertop faucet filter CTF-01
Common questions
What does the Waterdrop Countertop faucet filter CTF-01 remove?
The Waterdrop Countertop faucet filter CTF-01 is certified (NSF/ANSI 42) to reduce chlorine. Waterdrop also claims lead and fluoride from lab tests that are not certification. For 2 people drinking and cooking with it, replacement filters cost about $40 a year.
Does the Waterdrop Countertop faucet filter CTF-01 remove PFAS?
It has no certifier listing or brand claim for PFAS reduction.
How much does the Waterdrop Countertop faucet filter CTF-01 cost to run?
About $40 a year for 2 people ($40 for 1, $40 for 4), counting replacement filters, for drinking and cooking water (0.28 gallons per person a day, EPA's average adult intake).
Data checked 2026-10-23. 102 filters tracked.