Waterdrop · Under-sink filter
Waterdrop 10UA: what it removes and what it costs
Model: 10UA (WD-10UA)
The Waterdrop 10UA is certified (NSF/ANSI 42) to reduce chlorine. Waterdrop also claims mercury from lab tests that are not certification. For 2 people drinking and cooking with it, replacement filters cost about $31 a year.
1
certified reductions we track
0.3¢
filters per gallon at rated life
Price checked 2026-10-23. We may earn a commission.
What the Waterdrop 10UA 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") |
| Mercury | Brand test only | unnamed third-party lab (brand claim): "Heavy metals / mercury / sediment" |
Not verified, either way (no certification or brand claim): PFAS, Lead, Chloramine, Fluoride, Arsenic, Nitrate, Chromium 6, 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 | $31 | $31 | 30¢ |
| 2 people | 204 | $31 | $31 | 15¢ |
| 4 people | 409 | $31 | $31 | 7.6¢ |
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 0.3¢ a gallon (the figure at the top of this page).
Replacement filters
| Filter | Rated life (gallons) | Rated life (months) | Price |
|---|---|---|---|
| WD-RF10 replacement | 11,000 Source noteIAPMO listing also 11,000 gal; some retailer/regional pages say 8,000 gal waterdropfilter.com | 12 Source note | $30.99 Source noteOne-time price; autoship $29.44 waterdropfilter.com |
Specs
- Type
- Under-sink filter
- Price
- $59
Source note
List $58.99; sale $39.99 with code seen 2026-10-23 waterdropfilter.com
- Installation
- DIY (under-sink or inline fittings)
- Flow rate
- 0.75 gal/min
Source note
Brand spec table 0.75 GPM (matches IAPMO listing); brand FAQ also says tested full flow 2.0 gpm at 60 psi waterdropfilter.com
- Needs power
- No
Compare the Waterdrop 10UA
Common questions
What does the Waterdrop 10UA remove?
The Waterdrop 10UA is certified (NSF/ANSI 42) to reduce chlorine. Waterdrop also claims mercury from lab tests that are not certification. For 2 people drinking and cooking with it, replacement filters cost about $31 a year.
Does the Waterdrop 10UA remove PFAS?
It has no certifier listing or brand claim for PFAS reduction.
How much does the Waterdrop 10UA cost to run?
About $31 a year for 2 people ($31 for 1, $31 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.