Espoma Soil Acidifier

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Espoma Soil Acidifier
Heavy metals (ppm)
OregonArsenic: 2 ppm
 Cadmium:< 1 ppm
 Mercury: 0.2 ppm
 Nickel:< 5 ppm
 Lead:< 5 ppm
WashingtonArsenic: 1.1 ppm
 Cadmium:< 1 ppm
 Cobalt:< 5 ppm
 Mercury:< 0.4 ppm
 Molybdenum:< 5 ppm
 Nickel:< 5 ppm
 Lead:< 5 ppm
 Selenium:< 1 ppm
 Zinc: 11 ppm
Sources: ODA[1], WSDA[2]
retrieved 4 May 2017
Advertising disclosure

Espoma Soil Acidifier is a sulfur product from The Espoma Company. Sulfur is used to lower the pH of soils. Heavy metal analyses of the product reported to Oregon and Washington State can be found in the info box on this page. These analyses show the quantities of heavy metals, in parts per million (ppm), of arsenic (As), cadmium (Cd), cobalt (Co), lead (Pb), mercury (Hg), molybdenum (Mo), nickel (Ni), selenium (Se) and zinc (Zn) present in a sample of the product. Oregon does not report concentrations of cobalt, molybdenum, selenium or zinc.

The fertilizer heavy metals analyses information for Espoma Soil Acidifier is from the Oregon Department of Agriculture and the Washington State Department of Agriculture. The information on WikiFootprints was last obtained from the agency websites on 4 May 2017. WikiFootprints is not an official source of this information and may not represent the most recent analysis of the product. Official data can be obtained from the Oregon Department of Agriculture Fertilizer Program and the Washington State Department of Agriculture Fertilizer Product Database.[1][2]


Sulfur, fertilizers, and other products used to increase soil fertility can contain significant amounts of heavy metals, such as arsenic, cadmium, lead, mercury, and nickel. Sulfur products are often used on a regular basis, so there can be a cumulative effect on heavy metal concentrations in the soil. Several state departments of agriculture regulate the concentrations of heavy metals, in agricultural products, to protect human health and natural resources from toxicity.

The Oregon Department of Agriculture sets required lower limits of detection for each heavy metal concentration measured. At the minimum laboratories must be able to detect concentrations of 10.0 ppm arsenic, 5.0 ppm cadmium, 5.0 ppm lead, 0.20 ppm mercury, and 5.0 ppm nickel.[3] The concentrations of arsenic, cadmium, lead, mercury and nickel, reported to Oregon, are at or below the maximum lower limit of detection.[1]

See also

  • Sulfur - comparison of heavy metal concentrations in garden and agricultural sulfur products


  1. 1.0 1.1 1.2 Detail information Registered Fertilizer, Ag Mineral, Ag Amendment, and Lime Products. Oregon Department of Agriculture. Web.
  2. 2.0 2.1 Fertilizer Product Database. Washington State Department of Agriculture. Web.
  3. How Do I Register a Fertilizer Product in Oregon?. Oregon Department of Agriculture. Web. 6 May 2017