Environmental Chemistry Laboratory

At GLEC we have the experienced staff, equipment, and resources necessary to conduct environmental chemistry evaluations, either in support of other programs or as stand-alone projects. GLEC has completed hundreds of integrated surveys of large and small water bodies involving the collection and chemical analysis of water, effluent, sediment, and biological tissue samples for inorganic constituents. GLEC’s stringent Quality Assurance/Quality Control (QA/QC) pro cedures comply with the National Environmental Laboratory Accreditation Program (NELAP). All laboratory practices follow written Standard Great Lakes Environmental Center Operating Procedures. A list of commonly requested parameters and their associated reporting limits are listed below; other parameters are available.


Inorganic/Nutrient Chemistry Analysis Examples
Alkalinity 20 mg/L
Biochemical Oxygen Demand 0.2 mg/L
Chloride (CL-) 2 mg/L
Chlorophyll a 0.0007 mg/L
Color 2 CU
Conductivity 1 uhos/cm
Grain Size Analysis NA
Hardness 5 mg/L
Ammonia (NH3-N)
Kjeldahl, Total (TKN)
Nitrate/Nitrite (NO3/NO2-N)
Nitrate (NO3-N)
Nitrite (NO2-N)
Total Nitrogen

0.2 mg/L
0.4 mg/L
0.005 mg/L
0.005 mg/L
0.005 mg/L
0.3 mg/L
Periphyton (Ashfree Dry Weight ) 0.0005 g
Total (TP)
Low Level (TP)
Soluble Reactive (SRP)
Low Level SRP
Dissolved Organic (DOP )

0.003 mg/L
0.001 mg/L
0.003 mg/L
0.001 mg/L
0.003 mg/L
Total Suspended (TSS)
Total Dissolved (TDS)

0.5 mg/L
5 mg/L
Suspended Sediment Concentration (S SC) 1 mg/L
Laboratory Services



Robin Silva-Wilkinson

Principal Research Scientist
Phone: 231-941-2230


GLEC operates one of only a few U.S. laboratories accredited for whole sediment toxicity testing. GLEC also maintains NELAP accreditation for chlorophyll and nutrient chemistry testing.

Great Lakes Environmental Center

739 Hastings Street
Traverse City, MI   49686

Phone: (231) 941-2230
Fax: (231) 941-2240