Official data Source: US Census Bureau international trade data
Track this productWater filtering or purifying machinery and apparatus
In short
- The US imported $1.88B of this product over the 12 months to August 2026, down 0.6% on the year before.
- Canada is the largest supplier, with 17.7% of US imports; Mexico is next, with 13.0%.
- China has the lowest price, but landed at a US port with freight and duty Mexico is cheaper: $13.74 each against $14.56 each.
- Duty paid averaged 9.3% of the value of imports in August 2026, down 1.7 points on a year earlier.
- Singapore is gaining share: 3.4% over the last 12 months, up from 1.1%.
- 4 Federal Register notices named this product's tariff codes in the last 12 months.
US imports, Aug 2026
$170.1M
↑ +36% vs Aug 2025
Last 12 months
$1.88B
↓ −0.6% vs the 12 months before
Average duty paid
9.3%
↓ −1.7 pts vs Aug 2025
Top supplier
Canada
17.7% of US imports
US imports by month
The last 13 months, so the same month a year ago is on the left. August 2026 is highlighted. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.
Show the numbers
| Month | US imports |
|---|---|
| August 2025 | $125.3M |
| September 2025 | $143.8M |
| October 2025 | $146.7M |
| November 2025 | $142.4M |
| December 2025 | $158.3M |
| January 2026 | $155.6M |
| February 2026 | $135.6M |
| March 2026 | $160.3M |
| April 2026 | $166.0M |
| May 2026 | $166.6M |
| June 2026 | $175.5M |
| July 2026 | $160.2M |
| August 2026 | $170.1M |
What changed
- US imports were $170.1M in August 2026, up 6.2% from July 2026 and up 36% from August 2025.
- Over the 12 months to August 2026 they totalled $1.88B, down 0.6% on the 12 months before.
- Biggest moves in market share since July 2026: Germany up from 4.4% to 7.8%, Vietnam down from 3.7% to 1.4%.
- Average price from Mexico fell 16% since July 2026, to $12.87 each.
- Duty paid on imports from Vietnam rose from 8.1% to 11.6% of their value since July 2026.
- Duty paid on imports from Korea, South rose from 9.1% to 12.4% of their value since July 2026.
US trade by year
US imports were $1.88B in the 12 months to Aug 2026, up 76% on the 12 months to Aug 2017. US exports were $1.26B, up 19%. In January 2022 the HS 2022 revision moved some goods between this code and 8524.11, 8524.12, 8524.19 and 10 more, so part of a change across the dashed line can be the revision. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.
Show the numbers
| Period | US imports |
|---|---|
| 12 months to Aug 2017 | $1.07B |
| 12 months to Aug 2018 | $1.23B |
| 12 months to Aug 2019 | $1.28B |
| 12 months to Aug 2020 | $1.44B |
| 12 months to Aug 2021 | $1.55B |
| 12 months to Aug 2022 | $1.79B |
| 12 months to Aug 2023 | $1.99B |
| 12 months to Aug 2024 | $2.05B |
| 12 months to Aug 2025 | $1.89B |
| 12 months to Aug 2026 | $1.88B |
- Canada
- Mexico
- China
- Korea, South
- All countries
Show the numbers
| Period | Canada | Mexico | China | Korea, South |
|---|---|---|---|---|
| 12 months to Aug 2017 | 19.0% | 14.6% | 29.1% | 4.5% |
| 12 months to Aug 2018 | 19.1% | 13.1% | 28.5% | 6.9% |
| 12 months to Aug 2019 | 22.9% | 13.2% | 19.7% | 7.9% |
| 12 months to Aug 2020 | 26.5% | 14.0% | 18.8% | 6.7% |
| 12 months to Aug 2021 | 20.3% | 14.1% | 18.3% | 8.4% |
| 12 months to Aug 2022 | 20.3% | 13.3% | 17.3% | 8.3% |
| 12 months to Aug 2023 | 17.3% | 10.5% | 12.0% | 6.4% |
| 12 months to Aug 2024 | 21.0% | 12.3% | 13.0% | 9.7% |
| 12 months to Aug 2025 | 20.7% | 14.7% | 12.8% | 7.4% |
| 12 months to Aug 2026 | 18.8% | 13.2% | 11.7% | 8.6% |
Show the numbers
| Period | Canada | Mexico | China | Korea, South | All countries |
|---|---|---|---|---|---|
| 12 months to Aug 2017 | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% |
| 12 months to Aug 2018 | 0.0% | 0.0% | 1.2% | 0.0% | 0.3% |
| 12 months to Aug 2019 | 0.0% | 0.0% | 8.1% | 0.0% | 1.6% |
| 12 months to Aug 2020 | 0.0% | 0.0% | 6.3% | 0.0% | 1.2% |
| 12 months to Aug 2021 | 0.0% | 0.0% | 20.2% | 0.0% | 3.7% |
| 12 months to Aug 2022 | 0.0% | 0.0% | 21.5% | 0.0% | 3.7% |
| 12 months to Aug 2023 | 0.0% | 0.0% | 18.0% | 0.0% | 2.2% |
| 12 months to Aug 2024 | 0.0% | 0.0% | 19.4% | 0.0% | 2.5% |
| 12 months to Aug 2025 | 0.6% | 0.9% | 32.1% | 3.2% | 6.0% |
| 12 months to Aug 2026 | 0.7% | 1.1% | 33.6% | 11.2% | 10.6% |
| Period | US imports | Duty paid | US exports |
|---|---|---|---|
| 12 months to Aug 2026 | $1.88B−0.6% | 10.6%+4.6 pts | $1.26B−3.8% |
| 12 months to Aug 2025 | $1.89B−7.7% | 6.0%+3.5 pts | $1.31B+1.6% |
| 12 months to Aug 2024 | $2.05B+3.2% | 2.5%+0.4 pts | $1.29B+1.7% |
| 12 months to Aug 2023 | $1.99B+11% | 2.2%−1.5 pts | $1.27B+4.3% |
| 12 months to Aug 2022HS 2022 revision | $1.79B+16% | 3.7%0.0 pts | $1.21B+8.9% |
| 12 months to Aug 2021 | $1.55B+7.7% | 3.7%+2.5 pts | $1.11B+9.3% |
| 12 months to Aug 2020 | $1.44B+12% | 1.2%−0.4 pts | $1.02B−7.6% |
| 12 months to Aug 2019 | $1.28B+4.2% | 1.6%+1.3 pts | $1.10B+5.6% |
| 12 months to Aug 2018 | $1.23B+15% | 0.3%+0.3 pts | $1.05B−0.8% |
| 12 months to Aug 2017 | $1.07B | 0.0% | $1.05B |
Who supplies the US
August 2026. Small figures under each value are the change from August 2025. Landed cost by origin, below, adds freight and duty to the price.
| Country | US imports | Share | Average price | Duty paid | Last 13 months |
|---|---|---|---|---|---|
| Canada | $30.0M | 17.7%−6.1 pts | $33.21 each−74% | 0.4%−0.1 pts | |
| Mexico | $22.1M | 13.0%−0.4 pts | $12.87 each+1.7% | 0.6%−1.0 pts | |
| China | $19.3M | 11.3%+1.1 pts | $10.97 each+33% | 29.5%−22.3 pts | |
| Korea, South | $13.7M | 8.0%+0.4 pts | $18.05 each+19% | 12.4%+6.5 pts | |
| Germany | $13.3M | 7.8%+1.8 pts | $70.97 each+404% | 8.7%−2.5 pts | |
| France | $11.7M | 6.9%+4.5 pts | $343.77 each−20% | 10.0%−3.1 pts | |
| Israel | $9.0M | 5.3%+3.5 pts | $214.21 each−42% | 12.5%−1.1 pts | |
| Singapore | $7.9M | 4.6%+4.1 pts | $216.55 each−3.2% | 6.9%−3.1 pts | |
| Other countries (40) | $43.1M | 25.3%−8.5 pts | $15.63 each−19% | 10.0%−0.7 pts | |
| All countries | $170.1M | 100.0% | $20.76 each+7.3% | 9.3%−1.7 pts |
The 3 largest suppliers had 43.8% of US imports over the last 12 months.
Landed cost by origin
What importers paid to land this product at a US port from each main supplier, June–August 2026: the price, freight and insurance to the first US port, and duty, per unit. Suppliers with 3% or more of these imports, cheapest landed first. Small figures under landed cost are the change from the same months a year earlier.
- Price
- Freight and insurance
- Duty
| Country | Price | Freight and insurance | Duty | Landed cost | Make-up |
|---|---|---|---|---|---|
| Mexico | $13.61 each | $0.05 each0.4% of price | $0.08 each0.6% of price | $13.74 each+10.0% | |
| China | $10.59 each | $0.85 each8.1% of price | $3.11 each29.4% of price | $14.56 each+9.6% | |
| Korea, South | $17.88 each | $0.78 each4.4% of price | $1.87 each10.5% of price | $20.53 each+44% | |
| Canada | $34.01 each | $0.82 each2.4% of price | $0.18 each0.5% of price | $35.01 each−74% | |
| Germany | $48.82 each | $1.56 each3.2% of price | $4.48 each9.2% of price | $54.85 each+142% | |
| Singapore | $92.53 each | $2.04 each2.2% of price | $6.48 each7.0% of price | $101.05 each+397% | |
| Israel | $268.72 each | $11.81 each4.4% of price | $28.83 each10.7% of price | $309.35 each+55% | |
| France | $408.58 each | $5.58 each1.4% of price | $40.78 each10.0% of price | $454.95 each+3.3% | |
| All countries | $19.82 each | $0.71 each3.6% of price | $1.83 each9.3% of price | $22.36 each+5.7% |
Landed at a US port, Mexico was cheapest, at $13.74 each: 5.6% below China.
China had the lowest price before freight and duty, $10.59 each, but they added 37.4% to it.
Landed cost from Singapore rose 397% on a year earlier, to $101.05 each, mostly on price: $17.88 each then, $92.53 each now.
How the market is shifting
Singapore gained the most share: 3.4% of US imports over the last 12 months, up from 1.1% in the 12 months before. Canada lost the most: 18.8%, down from 20.7%. The charts show September 2024 to August 2026 for the 4 largest suppliers over the last 12 months. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.
- Canada
- Mexico
- China
- Korea, South
- All countries
Show the numbers
| Month | Canada | Mexico | China | Korea, South |
|---|---|---|---|---|
| September 2024 | 20.8% | 14.8% | 10.3% | 8.1% |
| October 2024 | 22.4% | 17.6% | 9.3% | 9.1% |
| November 2024 | 20.7% | 15.8% | 11.1% | 4.6% |
| December 2024 | 21.7% | 14.3% | 13.2% | 4.9% |
| January 2025 | 18.7% | 14.1% | 18.3% | 5.3% |
| February 2025 | 19.5% | 15.8% | 15.5% | 6.6% |
| March 2025 | 25.6% | 10.9% | 17.7% | 7.6% |
| April 2025 | 17.1% | 15.4% | 16.2% | 7.2% |
| May 2025 | 20.1% | 15.9% | 11.1% | 8.9% |
| June 2025 | 22.0% | 14.7% | 6.8% | 9.5% |
| July 2025 | 15.4% | 14.3% | 12.3% | 10.0% |
| August 2025 | 23.7% | 13.4% | 10.2% | 7.6% |
| September 2025 | 23.0% | 14.1% | 8.1% | 6.4% |
| October 2025 | 22.3% | 19.4% | 9.5% | 9.2% |
| November 2025 | 27.5% | 13.3% | 7.0% | 6.8% |
| December 2025 | 21.7% | 11.7% | 9.2% | 5.7% |
| January 2026 | 17.7% | 12.7% | 11.5% | 10.3% |
| February 2026 | 17.4% | 14.1% | 11.6% | 7.4% |
| March 2026 | 16.2% | 12.5% | 13.0% | 8.8% |
| April 2026 | 14.0% | 12.7% | 14.6% | 10.3% |
| May 2026 | 17.1% | 11.0% | 18.0% | 8.7% |
| June 2026 | 16.5% | 12.7% | 11.6% | 10.1% |
| July 2026 | 16.9% | 12.7% | 13.5% | 10.4% |
| August 2026 | 17.7% | 13.0% | 11.3% | 8.0% |
Show the numbers
| Month | Canada | Mexico | China | Korea, South | All countries |
|---|---|---|---|---|---|
| September 2024 | 0.0% | 0.0% | 20.9% | 0.0% | 2.2% |
| October 2024 | 0.0% | 0.0% | 19.7% | 0.0% | 1.8% |
| November 2024 | 0.0% | 0.0% | 21.0% | 0.0% | 2.3% |
| December 2024 | 0.0% | 0.0% | 21.1% | 0.0% | 2.8% |
| January 2025 | 0.0% | 0.0% | 21.0% | 0.0% | 3.8% |
| February 2025 | 0.0% | 0.0% | 21.6% | 0.0% | 3.4% |
| March 2025 | 1.4% | 3.0% | 23.0% | 0.0% | 4.7% |
| April 2025 | 1.4% | 1.8% | 45.6% | 1.6% | 9.3% |
| May 2025 | 1.5% | 1.7% | 66.8% | 9.6% | 12.5% |
| June 2025 | 0.9% | 1.5% | 52.2% | 10.0% | 9.4% |
| July 2025 | 1.1% | 2.3% | 51.8% | 7.8% | 12.3% |
| August 2025 | 0.5% | 1.6% | 51.8% | 5.9% | 11.0% |
| September 2025 | 0.3% | 1.2% | 50.2% | 14.3% | 12.2% |
| October 2025 | 1.4% | 1.4% | 45.3% | 15.0% | 12.2% |
| November 2025 | 2.5% | 1.5% | 42.7% | 13.3% | 11.6% |
| December 2025 | 0.6% | 1.4% | 39.4% | 6.9% | 11.7% |
| January 2026 | 0.4% | 3.0% | 41.1% | 13.2% | 12.3% |
| February 2026 | 0.4% | 1.9% | 37.1% | 12.9% | 11.7% |
| March 2026 | 0.4% | 0.6% | 27.1% | 8.3% | 8.9% |
| April 2026 | 0.1% | 0.6% | 26.6% | 10.0% | 9.5% |
| May 2026 | 0.2% | 0.6% | 28.1% | 10.0% | 10.5% |
| June 2026 | 0.5% | 0.6% | 29.0% | 10.0% | 9.2% |
| July 2026 | 0.8% | 0.5% | 29.6% | 9.1% | 9.2% |
| August 2026 | 0.4% | 0.6% | 29.5% | 12.4% | 9.3% |
Tariff actions touching this product
When the duty paid on this product changed and stayed changed, for its main suppliers and all countries, newest first, with the Federal Register notices that named the product in the 3 months before. Rates are medians of the 4 months either side, less any usual seasonal swing. A change shows what happened to duty paid, not why; read each notice for what it did.
- February–March 2026 · Duty paid: China 42.0% → 27.5%, Israel 15.0% → 10.0%.
- September 2025 · Duty paid: China 51.9% → 44.1%.
- Implementing Certain Tariff-Related Elements of the U.S.-EU Framework on an Agreement on Reciprocal, Fair, and Balanced Trade
- Implementing Certain Tariff-Related Elements of the United States-Japan Agreement
- Imports of Automobiles, Automobile Parts, Civil Aircraft and Civil Aircraft Parts From the United Kingdom Under Executive Order 14309
- April–June 2025 · Duty paid: China 21.5% → 51.9%, Israel 0.5% → 11.8%, all countries 4.2% → 11.7%.
- April 2021 · Duty paid: China 18.8% → 24.8%.
- November 2020 · Duty paid: China 11.7% → 18.7%.
- June 2020 · Duty paid: China 4.0% → 11.1%.
- August 2018 · Duty paid: China 0.1% → 10.4%.
Federal Register notices from the last 12 months that list this product's tariff codes. A notice can add a duty, exclude products from one or only mention them, so read each for what it changes. Search the Federal Register for 8421.21
- Notice of Action: Brazil's Acts, Policies, and Practices Related to Digital Trade and Electronic Payment Services; Unfair, Preferential Tariffs; Anti-Corruption Enforcement; Intellectual Property Protection; Ethanol Market Access; and Illegal Deforestation
- Notice of Determination and Request for Comments Concerning Action Pursuant to Section 301: Brazil's Acts, Policies, and Practices Related to Digital Trade and Electronic Payment Services; Unfair, Preferential Tariffs; Anti-Corruption Enforcement; Intellectual Property Protection; Ethanol Market Access; and Illegal Deforestation
- Implementing Certain Tariff-Related Elements of the Framework for a United States-Switzerland-Liechtenstein Agreement on Fair, Balanced, and Reciprocal Trade
- Implementing Certain Tariff-Related Elements of the U.S.-Korea Strategic Trade and Investment Deal
Where it enters the US
Main ports of entry over the 12 months to August 2026: US imports and share.
Where US exports go
US exports were $90.0M in August 2026, down 21% from August 2025, and $1.26B over the last 12 months, down 3.8% on the 12 months before. Fastest-growing market with 3% or more of US exports: Saudi Arabia, up 47%.
| Market | Last 12 months | Share | vs 12 months before |
|---|---|---|---|
| Canada | $314.6M | 25.0% | +9.7% |
| Mexico | $132.7M | 10.5% | −4.6% |
| China | $59.1M | 4.7% | −44% |
| Saudi Arabia | $54.0M | 4.3% | +47% |
| United Kingdom | $35.1M | 2.8% | +5.3% |
| Korea, South | $34.9M | 2.8% | +55% |
| Thailand | $33.0M | 2.6% | +182% |
| Taiwan | $32.1M | 2.5% | +6.2% |
| Other countries (176) | $563.0M | 44.7% | −12% |
| All countries | $1.26B | 100.0% | −3.8% |
Markets abroad
Each country's own import figures for this product, from UN Comtrade: the 8 biggest importers outside the US in the latest year each has reported, what they bought from the US, and the change from the year before. Values usually include freight and insurance to the importer's border, so they run a little above US export figures. Countries report a year or more late; 124 have reported 2025 so far.
| Market | Imports | vs year before | From the US | US share |
|---|---|---|---|---|
| Germany | $651.7Min 2025 | +19% | $31.5M | 4.8% |
| Canada | $447.8Min 2025 | +20% | $232.2M | 51.9% |
| France | $436.3Min 2025 | +6.1% | $29.6M | 6.8% |
| Mexico | $401.8Min 2025 | +20% | $114.9M | 28.6% |
| United Kingdom | $387.9Min 2025 | +0.6% | $29.1M | 7.5% |
| Malaysia | $372.1Min 2025 | +10% | $9.5M | 2.5% |
| Italy | $297.9Min 2025 | +16% | $23.1M | 7.8% |
| Spain | $270.4Min 2025 | +13% | $19.2M | 7.1% |
The biggest market outside the US is Germany, which imported $651.7M of this product in 2025, 4.8% of that from the US.
The US supplies 51.9% of imports into Canada and 28.6% into Mexico, but under 10% into Germany, France and the United Kingdom.
Of these, imports into Mexico grew fastest: up 20% from 2024 to 2025.
Related products
Other products under heading 8421: centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof. US trade over the 12 months to August 2026.
| Product | US imports | US exports |
|---|---|---|
| Filtering or purifying machinery and apparatus for gases, not elsewhere specifiedHS 8421.39 | $2.82B | $2.25B |
| Filtering or purifying machinery and apparatus for liquids, not elsewhere specifiedHS 8421.29 | $1.53B | $3.15B |
| Parts for filtering or purifying machinery and apparatus for liquids or gasesHS 8421.99 | $2.28B | $2.31B |
| Catalytic converters or particulate filters for purifying or filtering exhaust gases from internal combustion enginesHS 8421.32 | $3.27B | $1.24B |
| Oil or fuel filters for internal combustion enginesHS 8421.23 | $1.51B | $1.14B |
| Intake air filters for internal combustion enginesHS 8421.31 | $609.3M | $638.8M |
| Centrifuges, including centrifugal dryers (other than clothes dryers), not elsewhere specifiedHS 8421.19 | $282.4M | $160.9M |
| Parts of centrifuges, including centrifugal dryersHS 8421.91 | $209.9M | $108.2M |
About these figures
- Source: US Census Bureau international trade data, not seasonally adjusted, in US dollars. Retrieved November 3, 2026.
- US imports are general imports at customs value, which excludes freight and insurance. Exports are at free-alongside-ship value.
- Average price is customs value divided by quantity (number of items), across all of the product's 10-digit lines.
- Duty paid is the duty Census calculates on each country's imports for consumption, as a share of their value. It moves with tariff changes, exemptions and the mix of goods within the product.
- Landed cost adds Census's import charges (freight, insurance and other costs of bringing the goods to the first US port) and calculated duty to the customs value, per unit, across the product's 10-digit lines. It leaves out antidumping and countervailing duties, customs fees and transport inland. Prices are averages across the goods within the code, so a lower one can mean cheaper goods, not the same goods for less.
- Markets abroad are each country's imports as it reports them to UN Comtrade, in US dollars, usually including freight and insurance. Countries report a year or more late and in their own edition of the HS codes, so one still on an older edition is missing for codes that changed in 2022.
- Tariff notices are from the Federal Register, matched to this product by the HTS numbers in their text.
- Census revises recent months, so figures can change slightly. These are estimates for research and planning, not customs or legal advice.