Copyright © 1997 The Seattle Times Company
Thursday, July 3, 1997
(A supplement to The Seattle Times Special Report ‘Fear in the Fields’)
Heavy metals tested in fertilizers by the Washington Department of Agriculture. Fertilizer samples were collected in 1993 and 1994. Lab tests were performed April 30, 1997, by Columbia Analytical Services, Kelso, Wash. Source: WSDA May 16 memo to The Seattle Times.
| Cadmium (ppm) | Lead (ppm) | Arsenic (ppm) | Zinc (ppm) | Cd/Zn ratio < 100:1 recommended |
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| U.S. limit for heavy metals in fertilizer | no limit | no limit | no limit | no limit | na | |
| Canadian limit for heavy metals* | 20 | 500 | 75 | 1850 | na | Guaranteed nutrients (NPK) (%) | Fertilizer registered by: |
| 10.9-18.2-25.5 | Cenex Supply, Quincy | 56 | 300 | 2 | 3640 | 65 |
| 14-15-21 | Pacifex, Moses Lake | 34 | 346 | 0 | 3730 | 110 |
| 18-8-0 | Simplot Soilbuilders, Yakima | 25 | 0 | 2 | 366 | 15 |
| 31-10-0 | Wolfkill Feed & Fertilizer, Othello | 20 | 0 | 0 | 972 | 49 |
| 5-23-23-6, w/sulfur 6 | Wolfkill Feed & Fertilizer, Royal City | 15 | 0 | 4 | 6800 | 453 |
| 16-20-0-14, w/sulfur 14 | Saddle Mountain Supply Co., Royal City | 13 | 24 | 0 | 5430 | 418 |
| 4/15/34 | Crop Production Services, Quincy | 6 | 313 | 9 | 6270 | 1045 |
| 5-21-21-16, w/sulfur 15.9 | Wolfkill Feed & Fertilizer, Othello | 4 | 0 | 10 | 6000 | 1500 |
| 23-11-13 | Quincy Farm Chemical | 3 | 0 | 10 | 2990 | 997 |
| 15-40-0 | Pacifex, Pasco, | 1 | 0 | 0 | 67 | 67 |
| 37-0-0 | Wolfkill Feed & Fertilizer, Othello | 0 | 0 | 0 | 12 | na |
| 27-0-14 | Full Circle Inc., Ephrata | 0 | 0 | 0 | 12 | na |
| 39-0-0-6, w/sulfur 6 | Full Circle, Inc., Quincy | 0 | 0 | 0 | 4 | na |
| 37-0-0-7, w/sulfur 7 | Full Circle, Inc., Quincy | 0 | 0 | 0 | 4 | na |
| 28-9-9 | Crop Production, Othello | 0 | 0 | 10 | 3530 | na |
| 28-0-7 | Saddle Mountain Supply Co., Royal City | 0 | 0 | 0 | 150 | na |
| Nitro Cal 21-0-0, w/ calcium 11, sulfur 9 | Cominco Fertilizer, Spokane | 0 | 0 | 0 | 16 | na |
| 27-0-8 | Pacifex, Pasco, | 0 | 0 | 0 | 24 | na |
| 34-0-0 | Nexus Ag Chemical, Inc., Quincy. | 0 | 0 | 0 | 2 | na |
* In
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