Harbor Isle Lake Archive • St. Pete, FL
Cardno now Stantec Inc. Water Quality Data (April 2022 - July 2023)
The City of St. Petersburg contracted Cardno now Stantec Inc. to perform monthly water quality sampling for seven months starting in April 2022. The water sampling parameters to be collected, as outlined in the contract, do not include any nutrient level measurements. There are no bottom water samples being collected, which is a critical measurement area to understanding the bottom water environment and sediment-water interface. Again, there is less data and relevant data being taken compared to 2020-2021, intentionally, despite, the fact there's been no resolve to toxic blue-green algae or stabilization to dissolved oxygen levels (a major indicator of lake health) in Harbor Isle Lake. The collected water samples are analyzed by the following subcontractors of Cardno now Stantec:
Benchmark EnviroAnalytical Inc. - Their reports contain Chlorophyll A, Pheophytin, Color Apparent, Total Suspended Solids, Color pH measurements for the 3 Harbor Isle Lake Surface Water Sample Locations
GreenWater Laboratories - Their reports contain qualitative algal identification and Microcystin (cyanobacteria toxin) levels for the 3 Harbor Isle Lake Surface Water Sample Locations. Cardno city contract stated there would be 2 samples analyzed, one during dry season and one during wet season. When a secondary contract was created for continued sampling in Harbor Isle Lake, (after September 2022) 1 lake sample would be chosen to include the algal identification and toxin screening, if Cardno Stantec staff deemed it was necessary to perform. This conditional requirement is negligent considering the continued toxic nature of Harbor Isle lake. The company's lack of work experience in blue green algae monitoring does not make them a reliable source to assess what is considered a toxic risk or not.
All data can be viewed in a new window by clicking the icon to the left of the associated file.
2023
January 2023 Cardno now Stantec - Field Sampling Results
January 2023 Benchmark Enviro - Water Quality Parameters Report
January 2023 GreenWater Labs - Algal Identification (Microcystis Aeruginosa) Results
January 2023 GreenWater Labs - Cyanobacteria Toxin Microcystin Results
February 2023 Stantec - Field Sampling Results
February 2023 Benchmark Enviro - Water Quality Parameters Report
February 2023 GreenWater Labs - Algal Identification (Microcystis Aeruginosa) Results
February 2023 GreenWater Labs - Cyanobacteria Toxin Microcystin Results
March 2023 Stantec - Field Sampling Results
March 2023 Benchmark Enviro - Water Quality Parameters Report
March 2023 GreenWater Labs - Algal Identification (Microcystis Aeruginosa) Results
March 2023 GreenWater Labs - Cyanobacteria Toxin Microcystin Results
April 2023 Stantec - Field Sampling Results
April 2023 Benchmark Enviro - Water Quality Parameters Report
April 2023 GreenWater Labs - Algal Identification (Microcystis Aeruginosa) Results
April 2023 GreenWater Labs - Cyanobacteria Toxin Microcystin & Add. Cyanotoxin Results
May 2023 Stantec - Field Sampling Results
May 2023 Benchmark Enviro - Water Quality Parameters Report
May 2023 GreenWater Labs - Algal Identification (Microcystis Aeruginosa) Results
May 2023 GreenWater Labs - Cyanobacteria Toxin Microcystin Results
June 2023 Stantec - Field Sampling Results
June 2023 Benchmark Enviro - Water Quality Parameters Report
June 2023 GreenWater Labs - Algal Identification (Microcystis Aeruginosa) Results
June 2023 GreenWater Labs - Cyanobacteria Toxin Microcystin Results
July 2023 Stantec - Field Sampling Results
July 2023 Benchmark Enviro - Water Quality Parameters Report
July 2023 GreenWater Labs - Algal Identification (Microcystis Aeruginosa) Results
July 2023 GreenWater Labs - Cyanobacteria Toxin Microcystin Results
Water Quality Sampling and Cyanobacteria Toxin Testing Halted After July 2023
Toxic Cyanobacteria Present and Microcystin Toxin measured in lake water in July 2023
No Explanation or Update Provided by City of St. Petersburg to Harbor Isle Property Owners
City went against contractor Stantec's recommendation to continue monthly water quality sampling and algae and toxin analysis. Review the Final version of the "Adaptive Management Plan" under the City Contracted Reports page or directly at this link (PDF page 16/19)
2022
Cardno Sampling Schedule - Created August 2022 for extended sampling to July 2023, added nutrient analysis to surface samples, but still no bottom water samples
April 2022 Cardno - Harbor Isle Lake Sampling Location Map
April 2022 Cardno - Field Sampling Results (Dissolved Oxygen Probe Data)
April 2022 Benchmark Enviro - Water Quality Parameters Report
April 2022 GreenWater Labs - Algal Identification (Microcystis Aeruginosa) Results
April 2022 GreenWater Labs - Cyanobacteria Toxin Microcystin Results (Dry Season)
May 2022 Cardno - Field Sampling Results
May 2022 Benchmark Enviro - Water Quality Parameters Report
June 2022 Cardno - Field Sampling Results
June 2022 Benchmark Enviro - Water Quality Parameters Report
July 2022 Cardno - Field Sampling Results
July 2022 Benchmark Enviro - Water Quality Parameters Report
August 2022 Cardno - Field Sampling Results
August 2022 Benchmark Enviro - Water Quality Parameters Report
September 2022 Cardno - Field Sampling Results**
September 2022 Benchmark Enviro - Water Quality Parameters Report
September 2022 GreenWater Labs - Algal Identification (Microcystis Aeruginosa) Results
September 2022 GreenWater Labs - Cyanobacteria Toxin Microcystin Results (Wet Season)
Cardno ran additional toxin testing on Sept 2022 sample - 10/7/2022 results
October 2022 Cardno - Field Sampling Results
October 2022 Benchmark Enviro - Water Quality Parameters Report
October 2022 GreenWater Labs - Algal Identification (Microcystis Aeruginosa) Results
October 2022 GreenWater Labs - Cyanobacteria Toxin Microcystin Results
November 2022 Cardno - Field Sampling Results
November 2022 Benchmark Enviro - Water Quality Parameters Report
November 2022 GreenWater Labs - Algal Identification (Microcystis Aeruginosa) Results
November 2022 GreenWater Labs - Cyanobacteria Toxin Microcystin Results
December 2022 Cardno - Field Sampling Results
December 2022 Benchmark Enviro - Water Quality Parameters Report
December 2022 GreenWater Labs - Algal Identification (Microcystis Aeruginosa) Results
December 2022 GreenWater Labs - Cyanobacteria Toxin Microcystin Results
** The September 2022 Field Sampling File was not provided in a prior records request from the City of Saint Petersburg Clerk's Office. However, this missing 9/7 field data is logged in the October 2022 Field Sampling files and thereafter.