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Wastewater Laboratory

The Wastewater Laboratory is a comprehensive environmental testing facility certified by the State of Florida Department of Health.

The Laboratory is certified in the following categories:

  • Nutrients
  • Demands
  • Metals
  • Minerals
  • Organics
  • Physical Constituents
  • Microbiology

  • About the Wastewater Laboratory

    The Laboratory participates in the US EPA Discharge Monitoring Quality Assurance (QA) Program, and The State of Florida Water Pollution Evaluation Program. The State of Florida Department of Health approves the Comprehensive QA Plan of the Laboratory.

    The Laboratory receives and logs approximately 6000 samples and performs approximately 35,000 analytical tests on these samples annually. Samples come from the following sources: Glendale Wastewater Facility, Northside Wastewater Facility, Wetland, Industrial Pretreatment, and Public Works Lakes, among others. We are presently providing analytical services for the Lake Hollingsworth Restoration Project, the Lakeland Linder Regional Airport Wetlands Project, and we have recently completed the Wetlands Flow Study Project.

    The Laboratory uses state of the art analytical equipment to test for metals and nutrients. A fully equipped microbiology laboratory tests for coliforms and other bacteria in the City’s wastewater system and lakes. We use traditional wet-chemistry procedures to analyze other parameters such as Chemical and Biological Oxygen Demands, solids, cyanide, phenols, and recoverable petroleum hydrocarbons.

    Through stringent Quality Control/Quality Assurance, it is our goal to produce the most accurate and reliable data possible to protect our water and environment.

  • Methods of detection for Metals and Nutrients


    Using Flame or Graphite Furnace Atomic Absorption Spectroscopy, the Laboratory analyzes samples for a variety of heavy metals. These include Arsenic, Antimony, Cadmium, Calcium, Chromium, Copper, Iron, Lead, Magnesium, Molybdenum, Nickel, Potassium, Selenium, Silver, and Zinc.

    Method and Detection Limits

    Method Detection Limits (as of July 1, 1999)

    Parameter MDL Units
    Silver 0.04 ug/l
    Aluminum 23 ug/l
    Arsenic 0.7 ug/l
    Calcium 0.2 ug/l
    Cadmium 0.04 ug/l
    Chromium 0.2 ug/l
    Copper 2 ug/l
    Iron 15 ug/l
    Potassium 0.12 ug/l
    Lithium 2 ug/l
    Magnesium 0.06 ug/l
    Molybdenum 0.05 ug/l
    Sodium 0.2 ug/l
    Nickel 2.1 ug/l
    Lead 0.9 ug/l
    Tin 0.7 ug/l
    Selenium 1.1 ug/l
    Zinc 4 ug/l
    Alkalinity 2 mg/l
    Ammonia 0.1 mg/l
    Nitrate 0.02 mg/l
    TKN 0.2 mg/l
    Ortho-Phosphate 0.02 mg/l
    Total-Phosphate 0.14 mg/l


    Using a continuous flow injection Autoanalyzer, the Laboratory analyzes samples for various nutrients. These include ammonia, nitrate, nitrite, phosphorous, and Total Kjeldahl nitrogen.

  • Laboratory Certification Information

    Certification Information is in the process of being updated.   The information will be found here when available.

  • Contact the Wastewater Laboratory

    Paul Tilus, Chemist

    Phone: (863) 834-8277
    Fax: (863) 834-6271