Be Certain About Your Compost.
If you’re considering making, specifying, or purchasing compost, you need to know its properties. We are one of only a few laboratories in the US that have been STA (Seal of Testing Assurance) certified. Not all composts are the same, and knowing their qualities is key to understanding how to best utilize these resources.
*Samples that require bacterial testing must be received Monday through Thursday. Samples obtained on Friday or before a scheduled holiday closure will be assessed an additional fee.
Compost Test Packages
| ID | Description | |
| C1 | Solids, Nitrogen, Phosphorus, Potassium | $50.00 |
| C2 | C1 plus Sulfur, Calcium, Magnesium, Sodium, Iron, Aluminum, Manganese, Copper, Zinc | $75.00 |
| C3 | C1 plus Organic Matter and Carbon, and C:N Ratio | $62.50 |
| C4 | C1 plus Ammonium-Nitrogen | $62.50 |
| C5 | C2 plus Ammonium-Nitrogen | $85.00 |
| C6 | C2 plus Organic Matter and Carbon, C:N Ratio, pH, Soluble Salts | $100.00 |
| C10w/o | Solids, Total Nitrogen, Phosphorus, Potassium, Calcium, Magnesium, pH, Soluble Salts, Organic Matter, Carbon, C:N Ratio, Aggregate Size Distribution, Germination, Foreign Material (Inerts), and Respiration. | $265.00 |
| 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. | $42.50 |
| 503 Metals Pkg | Arsenic, Cadmium, Chromium, Copper, Lead, Mercury, Molybdenum, Nickel, Selenium and Zinc | Inquire |
US Compost Council - STA Compliant Packages
| ID | Description | |
| C9 | Meets minimum requirements for United States Composting Council (USCC) Seal of Testing Assurance (STA) Participants. Includes Moisture, Total Nitrogen, Phosphorus, Potassium, Calcium, Magnesium, pH, Soluble Salts, Organic Matter, Fecal Coliform (MPN/g), % Passing 3/8” Sieve, Maturity (Germination/Vigor), Stability (Respiration), and 503 Heavy Metals | $365.00 |
| C9SALMON | Meets minimum requirements for United States Composting Council (USCC) Seal of Testing Assurance (STA) Participants. C9 with Salmonella (MPN/4g) in place of Fecal Coliform (MPN/g) | $385.00 |
| C9NC | Meets North Carolina DOT requirements, only available as an add-on to the C9 or C9SALMON package. Includes Total inerts and additional sieves (1/4", 3/4", 1", 3") | $54.00 |
| C9OR | Meets Oregon DOT requirements, only available as an add-on to the C9 or C9SALMON package. Includes total inerts, total carbon, C:N ratio, and additional sieves (1/4", 1/2", 5/8", 3/4", 1", 3") | $76.00 |
| C9TX | Meets Texas DOT requirements, only available as an add-on to the C9 or C9SALMON package. Includes additional sieve (5/8") | $11.00 |
| C9WA | Meets Washington DOT requirements, only available as an add-on to the C9 or C9SALMON package. Includes total inerts, total carbon, C:N ratio, and additional sieves (1/4", 5/8", 3/4", 1", 3") | $72.00 |
| 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, Carbon, C:N Ratio, Fecal Coliform (MPN Class A), Aggregate Size Distribution, Germination, Respiration, Foreign Material (Inerts), and 503 Heavy Metals | $450.00 |
| C10SALMON | Solids, Total Nitrogen, Phosphorus, Potassium, Calcium, Magnesium, pH, Soluble Salts, Organic Matter, Carbon, C:N Ratio, Aggregate Size Distribution, Germination, Foreign Material (Inerts), and Respiration. | $470.00 |
Compost Tea Test Packages
| ID | Description | |
| CT8 | Analysis of compost tea solution (provided by client): pH , Nitrate-Nitrogen, Phosphorus, Potassium, Calcium, Magnesium, Sodium, Conductivity | $35.00 |
| CT8A | Same as CT8 plus Zinc, Manganese, Iron, Copper, Boron, Sulfur | $45.00 |
| 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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A&L Great Lakes Laboratories, Inc. is an independently owned and operated agricultural testing laboratory located in Fort Wayne, Indiana. Our intent is to deliver fast, accurate analyses that you can trust to make your most important decisions.
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