Limestone Filter Media Stone from Mexico
Graded crushed limestone (3-6 inch) used as filter media in water treatment plants. Classified HTS 2517.10.00.20 as crushed limestone for concrete or similar aggregate uses. Meets legal definition excluding pebbles while fitting common construction applications.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Water absorption and acid solubility tests required; specify filtration end-use; quarantine periods for invasive species in quarry runoff