Waterdrop · Under-sink reverse osmosis
Waterdrop X16: what it removes and what it costs
The Waterdrop X16 is certified (NSF/ANSI 58 and NSF/ANSI 42) to reduce chlorine and TDS. Waterdrop also claims PFAS, lead, fluoride and arsenic from lab tests that are not certification.
2
certified reductions we track
—
filters per gallon at rated life
Price checked 2026-10-23. We may earn a commission.
What the Waterdrop X16 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") |
| TDS | Certified | IAPMO R&T listing, NSF/ANSI 58 ("TDS") |
| PFAS | Brand test only | SGS (per brand FAQ): "PFAS (PFOA/PFOS)" |
| Lead | Brand test only | SGS (per brand FAQ): "Lead" |
| Fluoride | Brand test only | SGS (per brand FAQ): "Fluoride" |
| Arsenic | Brand test only | Waterdrop (brand claim): "Arsenic" |
| Chromium 6 | Brand test only | Waterdrop (brand claim): "Chromium-VI" |
Not verified, either way (no certification or brand claim): Chloramine, Nitrate, Mercury, Microplastics, Cysts, VOCs, 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, plus the water sent to the drain at an average water and sewer price. 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 | Drain water | Total a year | Per gallon |
|---|---|---|---|---|---|
| 1 person | 102 | — | 34 gal ($1) | — | — |
| 2 people | 204 | — | 68 gal ($1) | — | — |
| 4 people | 409 | — | 136 gal ($3) | — | — |
Rated production is 1600 gallons a day; 2 people need about 0.56 — well within it. Colder water and lower pressure reduce actual output.
Replacement filters
| Filter | Rated life (gallons) | Rated life (months) | Price |
|---|---|---|---|
| WD-F1A (pre-filter) | 1,200 Source noteCapacity from IAPMO NSF/ANSI 42 listing, not brand page myplc.iapmo.org | 12 Source note | — Source noteNot found sold individually; 1-year combo F1A+F2 is $92.97 waterdropfilter.com |
| WD-F2 (post carbon) | 1,500 Source noteCapacity from IAPMO NSF/ANSI 42 listing myplc.iapmo.org | 6 Source note | $30.99 Source note |
| X16-F3 (RO membrane) | 2,900 Source note | 24 Source note | $179.99 Source note |
Specs
- Type
- Under-sink reverse osmosis
- Price
- $1,999
Source note
No sale shown 2026-10-23 waterdropfilter.com
- Installation
- DIY (under-sink or inline fittings)
- Rated production
- 1600 gallons per day
Source note
IAPMO NSF/ANSI 58 listing rates WD-X16 at 1,786 gpd waterdropfilter.com
- Pure to drain
- 3:1
Source note
- Needs power
- Yes
- Remineralization
- Yes
Compare the Waterdrop X16
Common questions
What does the Waterdrop X16 remove?
The Waterdrop X16 is certified (NSF/ANSI 58 and NSF/ANSI 42) to reduce chlorine and TDS. Waterdrop also claims PFAS, lead, fluoride and arsenic from lab tests that are not certification.
Does the Waterdrop X16 remove PFAS?
Waterdrop claims PFAS reduction from lab tests by SGS (per brand FAQ), but there is no certifier listing for it.
Data checked 2026-10-23. 102 filters tracked.