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City of St. Petersburg Water Quality Assurance Program

City of St. Petersburg Water Quality Assurance Program. Water Resources Department June 2, 2016. Our Water is Safe. The city’s water is safe for children, adults and pets. We are in full compliance with all regulations dictated by the EPA, FDEP. What is lead?.

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City of St. Petersburg Water Quality Assurance Program

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  1. City of St. PetersburgWater Quality Assurance Program Water Resources Department June 2, 2016

  2. Our Water is Safe. • The city’s water is safe for children, adults and pets. • We are in full compliance with all regulations dictated by the EPA, FDEP.

  3. What is lead? • Lead is a naturally occurring element– Pb. • Lead is generally not found in significant quantities in source water. • Lead leaches into water through corrosion of: • pipes • solder • washers • fixtures

  4. City Drinking Water Testing Sites • More than 180 sampling sites city-wide. • Approximately 3,500 samples taken per year. • 2,800 permit required tests • 700 quality assurance tests • Approximately 15,000 analyses are performed annually. • 6,500 permit required tests • 7,500 quality assurance tests • Monitor more than 30 chemical and biological parameters.

  5. Corrosion Control at Water Treatment Plant • Control Alkalinity - Hardness • Addition of lime • Maintain at 120 to 140 mg/l • Control Acid/Base - pH • Addition of caustic soda • Ideal pH of 8.2 to 8.3 • Automatic control and monitoring

  6. Distribution SystemWater Quality Monitoring • Initiated monthly lead analysis at 20 sites throughout distribution system • Results for April • 19 sites undetectable - below 1.4 parts per billion (ppb) • One site: 2.31 ppb • April Sample at Washington Terrace Pump Station – undetectable

  7. Criteria Used for Home Selection Lead and Copper Testing Program • Homes that were constructed between January 1982 and December 1988. • Plumbed with copper pipe with lead solder. • No treatment devices – filters, softeners, etc. • Same homes are used each sample year to monitor changes to baseline. • Must have permission of the home owner.

  8. Sampling Protocol – EPA Lead and Copper Rule • Samples are taken every three years, by Water Resources staff. • Sampling done in the summer when the water is the warmest. • Samples taken from the cold water faucet in kitchen or bathroom. • Water must sit in plumbing for at least six hours, cannot flush the line. • Five or more samples of the 50 samples tested (90% percentile) cannot exceed the Action Level of 15 parts per billion (ppb).

  9. Results of Sampling – Last Five Cycles

  10. Water Quality Assurance Testing - 2016

  11. Water Quality Assurance Testing - 2016

  12. Water Quality Assurance Testing - 2016

  13. City of St. PetersburgWater Quality Assurance Program QUESTIONS?

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