Not All Compost is Created Equal.

If you are thinking about making compost, specifying compost, or purchasing compost, you need to know its exact composition. A&L Great Lakes is one of only a select few laboratories in the U.S. that has been STA (Seal of Testing Assurance) certified. Protect your yield and your investment with our certified compost testing and analysis.

Compost Test Packages

ID Description
C1 Solids, Nitrogen, Phosphorus, Potassium $45.00
C2 C1 plus Sulfur, Calcium, Magnesium, Sodium, Iron, Aluminum, Manganese, Copper, Zinc $65.00
C3 C1 plus Organic Matter and Carbon, and C:N Ratio $55.00
C4 C1 plus Ammonium-Nitrogen $55.00
C5 C2 plus Ammonium-Nitrogen $75.00
C6 C2 plus Organic Matter and Carbon, C:N Ratio, pH, Soluble Salts $90.00
C10 Required for United States Composting Council (USCC) Seal of Testing Assurance (STA) Participants includes Solids, Total Nitrogen, Phosphorus, Potassium, Calcium, Magnesium, pH, Soluble Salts, Organic Matter, Fecal Coliform (MPN Class A), Aggregate Size Distribution, Germination, Respiration, Foreign Material and 503 Heavy Metals $375.00
C10w/o Alternative analysis package for United States Composting Council (USCC) Seal of Testing Assurance (STA) Participants includes Solids, Total Nitrogen, Phosphorus, Potassium, Calcium, Magnesium, pH, Soluble Salts, Organic Matter, Aggregate Size Distribution, Germination, Foreign Material and Respiration.

(Can be requested on composts not containing animal manures or biosolids.)
$225.00
C:N Package Solids, C:N Ratio, Total Nitrogen, Organic Matter and Carbon The above packages include Total Nitrogen by Dumas Method. Total Kjeldahl Nitrogen analysis may be substituted. Please contact the laboratory. $38.00
503 Metals Pkg Arsenic, Cadmium, Chromium, Copper, Lead, Mercury, Molybdenum, Nickel, Selenium and Zinc $160.00

Compost Tea Test Packages

ID Description
CT8 Analysis of compost tea solution (provided by client): pH , Nitrate-Nitrogen, Phosphorus, Potassium, Calcium, Magnesium, Sodium, Conductivity $30.00
CT8A Same as CT8 plus Zinc, Manganese, Iron, Copper, Boron, Sulfur $40.00
Compost Tea Preparation A&L Great Lakes technicians will follow your instructions on preparation of your compost tea. Variations include tea extraction ratios, extracting solutions, extraction time, aeration, etc. Inquire

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